/Pg 55 0 R /P 267 0 R /Type /StructElem endobj 711 0 obj /Pg 59 0 R /K [ 180 ] /K [ 32 ] /Pg 55 0 R /K [ 296 0 R ] /Type /StructElem 593 0 obj /S /P << 433 0 obj << 187 0 obj /Pg 55 0 R /Type /StructElem /Pg 55 0 R >> >> >> /Type /StructElem /K [ 0 ] 2. /K [ 642 0 R ] /S /Span /Type /StructElem /Pg 55 0 R /Pg 51 0 R /Type /StructElem /S /P /S /TD >> 291 0 obj Therefore, A becomes D and B becomes E, etc. /K [ 618 0 R ] endobj /S /LBody /Type /StructElem /S /Figure /K [ 165 ] /Type /StructElem >> /P 71 0 R /Pg 59 0 R /Type /StructElem /P 530 0 R 358 0 obj /P 342 0 R /Pg 55 0 R 879 0 obj << /S /TD 159 0 obj endobj /P 417 0 R endobj << >> 157 0 obj >> >> /Type /StructElem /Alt () /S /P >> /Type /StructElem /P 71 0 R << /Type /StructElem /P 868 0 R /Pg 55 0 R endobj /K [ 4 ] >> /Type /StructElem endobj /Pg 51 0 R 526 0 obj /P 183 0 R << >> >> << /Pg 51 0 R endobj /K [ 38 ] >> /Type /StructElem /K [ 6 ] /Nums [ 0 73 0 R 1 76 0 R 2 346 0 R 3 722 0 R 4 817 0 R 5 895 0 R ] /Pg 55 0 R Symmetric cryptography relies on shared secret key to ensure message confidentiality, so that the unauthorized attackers cannot retrieve the message. 634 0 obj /QuickPDFF0acabf8d 25 0 R /Pg 3 0 R >> /Pg 3 0 R /S /TD /Type /StructElem /Pg 55 0 R /P 71 0 R /Pg 51 0 R >> /Type /StructElem /S /P endobj 326 0 obj endobj /K [ 17 ] /K [ 61 ] /S /TR >> >> /QuickPDFFe1a5f475 39 0 R >> /P 175 0 R /K [ 67 ] /S /P In the cryptography system, a transposition cipher is a method of encryption by changing the position of plain text into different position. /Type /StructElem /P 380 0 R 878 0 obj /S /P 118 0 obj /Pg 57 0 R /Pg 55 0 R /S /P 714 0 obj >> 462 0 obj /K [ 541 0 R ] endobj << /Pg 59 0 R << /Worksheet /Part 436 0 obj << /Type /StructElem /P 95 0 R /S /LI /P 718 0 R /Pg 51 0 R >> << << /Pg 51 0 R /P 301 0 R 258 0 obj endobj >> endobj << 595 0 obj /Pg 55 0 R << endobj >> /Pg 55 0 R /P 71 0 R /P 598 0 R 264 0 obj endobj << endobj >> << << endobj 633 0 obj 648 0 obj /S /TD endstream /S /Span /K [ 704 0 R ] >> /P 71 0 R endobj 805 0 obj << /Pg 59 0 R >> /QuickPDFFe80602bf 12 0 R /Type /StructElem /Type /StructElem /Type /StructElem 748 0 obj /S /P /S /TD /K [ 11 ] /Pg 51 0 R endobj 183 0 obj >> /K [ 48 ] << endobj >> >> /Type /StructElem /Pg 59 0 R /Pg 51 0 R /S /P endobj /P 168 0 R /Type /StructElem /Pg 51 0 R 524 0 obj 651 0 obj >> >> 130 0 obj /S /TR endobj /P 741 0 R /Type /StructElem /K 71 /Pg 55 0 R endobj /S /LBody /P 362 0 R /P 857 0 R /Pg 63 0 R /K [ 280 0 R ] /S /LBody /P 363 0 R endobj >> /S /TR << /K [ 0 ] endobj >> >> endobj >> /S /P /K [ 266 0 R ] /K [ 36 ] 373 0 obj /P 857 0 R 108 0 obj << 635 0 obj << /Pg 55 0 R /P 185 0 R /P 428 0 R /Pg 59 0 R /K [ 599 0 R 601 0 R 603 0 R ] 894 0 obj /S /P /S /TD /Pg 3 0 R /Pg 51 0 R 665 0 obj 133 0 R 134 0 R 135 0 R 138 0 R 140 0 R ] endobj /Pg 55 0 R endobj endobj /P 530 0 R 461 0 obj /S /LBody << /P 530 0 R /Pg 55 0 R 385 0 obj /S /LI << /Pg 55 0 R >> /Pg 57 0 R /Pg 55 0 R >> /Pg 51 0 R A. Transposition techniques. 333 0 obj /P 71 0 R >> /S /P endobj /K [ 12 ] /Type /StructElem /S /P /K [ 38 ] /Type /StructElem << /Type /StructElem endobj /S /P /K [ 662 0 R ] endobj 592 0 R 598 0 R 604 0 R 610 0 R 616 0 R 622 0 R 628 0 R 634 0 R 640 0 R 646 0 R 652 0 R /Pg 55 0 R endobj /P 494 0 R >> 803 0 obj /Type /StructElem endobj /Pg 55 0 R /Pg 3 0 R /Type /StructElem /Pg 55 0 R /K [ 241 0 R 243 0 R 245 0 R ] >> endobj << 120 0 R 121 0 R 122 0 R 134 0 R 135 0 R 136 0 R 141 0 R 149 0 R 150 0 R 174 0 R 175 0 R >> /K [ 79 ] << /K [ 644 0 R ] endobj endobj /P 586 0 R /P 150 0 R /K [ 229 0 R 231 0 R 233 0 R ] 210 0 obj /Pg 55 0 R endobj << /Pg 55 0 R << endobj << /K [ 139 ] In the first stage Substitution techniques – Mono alphabetic, Caesar cipher, poly alphabetic cipher are used to … >> /K [ 571 0 R ] << /S /TR /Pg 3 0 R This technique is referred to as a transposition cipher. >> /S /Span /K [ 581 0 R 583 0 R 585 0 R ] /P 865 0 R << 121 0 obj >> /Type /StructElem /Type /StructElem /S /L /Pg 51 0 R /P 530 0 R /P 356 0 R >> << /Pg 55 0 R /P 525 0 R /S /P 336 0 obj /Type /StructElem >> << /S /TD Submitted by Himanshu Bhatt, on September 26, 2018 . /P 71 0 R /S /P /S /TD /S /P /Pg 55 0 R endobj /Type /StructElem /K 80 << /K [ 33 ] endobj 212 0 R 214 0 R 215 0 R 218 0 R 220 0 R 221 0 R 224 0 R 226 0 R 227 0 R 230 0 R 232 0 R /S /TD /Type /StructElem endobj 546 0 obj /Type /StructElem The two basic building blocks of all encryption techniques are substitution and transposition. /Type /StructElem /Pg 55 0 R /K [ 169 0 R ] /K 59 >> Substitution and Transposition are two cryptographic techniques. >> 653 0 obj /P 464 0 R /Pg 57 0 R /P 71 0 R endobj /S /LBody 238 0 obj /Pg 55 0 R 835 0 obj >> /Type /StructElem 769 0 R 770 0 R 771 0 R 772 0 R 773 0 R 774 0 R 775 0 R 776 0 R 777 0 R 778 0 R 779 0 R << Transposition Techniques - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. /K [ 217 0 R 219 0 R 221 0 R ] /Pg 55 0 R /Type /StructElem /Type /StructElem endobj /S /P /P 343 0 R endobj /S /TD /S /TD << 768 0 obj 485 0 obj /S /Span /Pg 59 0 R /K [ 67 ] /Type /StructElem endobj /Type /StructElem << /S /TR 268 0 obj /P 264 0 R /P 393 0 R /Pg 57 0 R /Pg 59 0 R /Type /StructElem /K [ 9 ] 624 0 obj 870 0 obj /S /P /K 122 /K [ 218 0 R ] /K [ 106 ] /Pg 55 0 R 592 0 obj /S /P 92 0 obj 759 0 obj /P 549 0 R endobj /Pg 55 0 R /Pg 55 0 R endobj /K [ 77 ] /S /P 551 0 obj /Pg 51 0 R 207 0 obj >> /Type /StructElem 853 0 obj 771 0 obj endobj 221 0 obj /P 71 0 R endobj << /Pg 55 0 R >> >> /P 670 0 R /K [ 39 ] endobj << >> 5 0 obj << /P 297 0 R << /Type /StructElem << /Type /StructElem /S /Span /K [ 7 ] >> /Type /StructElem >> /K [ 25 ] << 147 0 obj /Pg 51 0 R /S /TR endobj /Pg 55 0 R /K [ 27 ] endobj endobj /Type /StructElem >> Substitution Cipher and Transposition Cipher A substitution technique is one in which the letters of plain text are replaced by other letters or number or symbols. endobj /P 622 0 R /S /TD /Pg 51 0 R /P 893 0 R /S /TR /Pg 59 0 R /Type /StructElem endobj /K [ 51 ] /Pg 51 0 R /P 185 0 R /P 718 0 R /S /TD /Pg 57 0 R 165 0 R 167 0 R 169 0 R 171 0 R 173 0 R 174 0 R 178 0 R 179 0 R 180 0 R 184 0 R 188 0 R /P 141 0 R /P 712 0 R /Pg 55 0 R <>/Lang(en-IN)/Pages 3 0 R/StructTreeRoot 4 0 R/Metadata 1 0 R/Type/Catalog>> /Type /StructElem /Pg 51 0 R /S /TR 821 0 R 822 0 R 823 0 R 824 0 R 825 0 R 826 0 R 827 0 R 828 0 R 829 0 R 830 0 R 831 0 R >> endobj << endobj /K [ 49 ] /Pg 57 0 R /Pg 57 0 R endobj << /Type /StructElem endobj << /S /P /K [ 684 0 R ] 176 0 obj /Type /StructElem << endobj /Type /StructElem /P 185 0 R /K [ 399 0 R 401 0 R 403 0 R ] In this paper, we have made an attempt to enhance those techniques and make them more advanced. endobj endobj 549 0 obj /Type /StructElem /P 593 0 R endobj /Pg 55 0 R /S /TR 510 0 obj << << /K 40 /Pg 63 0 R >> 708 0 obj CRYPTOGRAPHY AND NETWORK SECURITY (CSL0502) By:- Saumya Saraswat Assistant Professor, Dept. /QuickPDFFc0419a67 20 0 R /Type /StructElem /P 276 0 R /Pg 55 0 R /P 106 0 R >> >> /K [ 720 0 R 723 0 R 725 0 R ] /S /P >> /K [ 844 0 R ] endobj /K [ 15 ] /Pg 57 0 R /Type /StructElem /P 342 0 R /P 537 0 R /Type /StructElem << >> /Type /StructElem /K [ 90 ] /P 327 0 R /P 342 0 R << 772 0 obj 235 0 obj >> /Type /StructElem >> 84 0 obj << >> << /F7 23 0 R << /Pg 57 0 R /Type /StructElem /S /P /K [ 441 0 R 443 0 R 445 0 R ] >> /K [ 85 ] endobj /K [ 60 ] /Type /StructElem Substitution Ciphers 3. << /Pg 51 0 R << /Type /StructElem /Pg 55 0 R << /P 71 0 R endobj << >> 314 0 obj 817 0 obj /Pg 55 0 R >> /Type /StructElem /Pg 55 0 R /K [ 854 0 R ] /K [ 186 0 R 192 0 R 198 0 R 204 0 R 210 0 R 216 0 R 222 0 R 228 0 R 234 0 R 240 0 R /Pg 3 0 R 116 0 obj /Type /StructElem endobj /P 512 0 R >> /Type /StructElem endobj 680 0 obj /Type /StructElem /Resources << << >> >> /K [ 71 0 R ] Transposition cipher In cryptography, a ... substitution cipher combined with a columnar transposition avoids the weakness of both. 239 0 obj /Type /StructElem 85 0 obj Cryptography is an art and science of converting original message into non-readable form. /Pg 51 0 R /P 453 0 R /F2 7 0 R /P 185 0 R /Type /StructElem endobj /S /P >> /K [ 456 0 R ] >> >> << /Type /StructElem /Type /StructElem 661 0 obj << Substitution and Transposition are two cryptographic techniques. /Type /StructElem endobj /S /TD /K 143 >> >> << /K [ 17 ] /K [ 3 ] /S /P /Type /StructElem >> >> >> << /K 98 /P 71 0 R >> /Type /StructElem /Pg 57 0 R >> << << endobj << /S /P << /P 71 0 R /Type /StructElem /Endnote /Note /K [ 25 ] /S /TR /P 71 0 R /Type /StructElem << /Type /StructElem /S /L /Type /StructElem /K [ 6 ] 424 0 obj /K [ 18 ] /Pg 59 0 R /K [ 46 ] << /K [ 114 0 R ] << endobj /S /Span << /S /TD >> >> << /Pg 57 0 R /Type /StructElem /Type /StructElem 567 0 obj 278 0 R 280 0 R 281 0 R 284 0 R 286 0 R 287 0 R 290 0 R 292 0 R 293 0 R 296 0 R 298 0 R /Alt () >> << /Pg 55 0 R /Type /StructElem 658 0 R 664 0 R 670 0 R 676 0 R 682 0 R 688 0 R 694 0 R 700 0 R 706 0 R 712 0 R ] /Type /StructElem /Type /StructElem /QuickPDFFf6b60c2f 41 0 R 4 0 obj /Pg 3 0 R /Pg 51 0 R /Type /StructElem /Type /StructElem Comparative Study of Various Substitution and Transposition Encryption Techniques Preeti Poonia Department of Computer Science & Engineering BRCM CET, Bahal, MDU, India Praveen Kantha Department of Computer Science & Engineering BRCM CET, Bahal, MDU, India ABSTRACT With the rapid development in the technology, Encryption is one the most power full approach to achieve data … << /K [ 611 0 R 613 0 R 615 0 R ] /Type /StructElem << /Type /StructElem /Pg 51 0 R . /Pg 63 0 R 667 0 obj /Type /StructElem /K [ 582 0 R ] /K [ 525 0 R 527 0 R 529 0 R ] /K [ 498 0 R ] /Pg 51 0 R Steganography These slides are based on . /Pg 57 0 R /Type /StructElem %���� >> /S /TD 684 0 obj >> >> /S /Span /Type /StructElem /Type /StructElem In this paper, we have developed the old transposition algorithm which includes the key based on plaintext. /S /TR /K [ 31 ] /K [ 78 ] << << /Pg 55 0 R /K [ 314 0 R ] /Pg 55 0 R /Pg 55 0 R /P 441 0 R /Pg 57 0 R >> /S /TR /S /TD /Pg 51 0 R /P 455 0 R /P 199 0 R /P 483 0 R >> endobj /P 71 0 R /P 386 0 R /K [ 14 ] << << /K [ 3 ] /Type /StructElem endobj /S /P endobj /P 479 0 R /Pg 51 0 R /Type /StructElem >> 188 0 obj endobj /K [ 638 0 R ] Caesar cipher is an example of substitution method. /Type /StructElem /S /P /S /P >> endobj 796 0 obj /S /P endobj /S /TR Comparative Study of Various Substitution and Transposition Encryption Techniques @article{Poonia2016ComparativeSO, title={Comparative Study of Various Substitution and Transposition Encryption Techniques}, author={Preeti Poonia and P. Kantha}, journal={International Journal of Computer Applications}, year={2016}, volume={145}, pages={24-27} } endobj /S /TD /P 866 0 R /Pg 3 0 R Keywords:- Substitution Cipher, Transposition Cipher, Encryption, Decryption, Diagonal transposition technique. /P 892 0 R >> /Pg 55 0 R endobj << >> << << /P 71 0 R << << >> << Encryption Substitution and Transposition Techniques” which can provide a good security when compared to techniques. These two methods are the basic building blocks of the encryption techniques and can also be used together, which is called a product cipher. endobj /S /P /S /P 670 0 obj /P 530 0 R 309 0 obj /P 185 0 R endobj /S /P >> >> /P 198 0 R << /S /Span /K [ 647 0 R 649 0 R 651 0 R ] /P 443 0 R >> /S /LBody /P 71 0 R /Pg 57 0 R endobj >> 2 0 obj /P 658 0 R /Pg 55 0 R endobj 397 0 obj /Pg 51 0 R /Pg 55 0 R /P 342 0 R >> /P 712 0 R << >> >> /K 26 224 0 obj endobj << /K [ 448 0 R ] << endobj 179 0 R 180 0 R 181 0 R 185 0 R 342 0 R 530 0 R 718 0 R 750 0 R 751 0 R 752 0 R 753 0 R /P 151 0 R >> endobj /S /Transparency /Type /StructElem 590 0 obj /Type /StructElem /P 146 0 R /Pg 55 0 R << endobj 450 0 obj /P 71 0 R /S /TD /P 635 0 R endobj >> /Type /StructElem /K [ 719 0 R 726 0 R 732 0 R 738 0 R 744 0 R ] << << << /P 71 0 R /Pg 51 0 R /K [ 98 0 R ] /S /TR /Pg 55 0 R << 713 0 obj /Pg 55 0 R >> /P 186 0 R /K 91 534 0 obj >> /Type /StructElem /K [ 866 0 R 868 0 R 870 0 R ] /Type /StructElem /S /TD /Pg 55 0 R /S /P /F11 37 0 R /P 234 0 R /Type /StructElem endobj 299 0 R 302 0 R 304 0 R 305 0 R 308 0 R 310 0 R 311 0 R 314 0 R 316 0 R 317 0 R 320 0 R << /Pg 55 0 R >> >> 434 0 obj /P 706 0 R /Pg 57 0 R /P 71 0 R /S /Span << 669 0 obj /Type /StructElem /P 71 0 R /K [ 867 0 R ] 527 0 obj endobj /P 71 0 R endobj /Type /StructElem /Type /StructElem /Pg 3 0 R << /K [ 877 0 R ] >> 438 0 obj /S /P << /K [ 29 ] endobj << /Pages 2 0 R /Pg 51 0 R /P 185 0 R << /S /P /S /TR endobj /P 470 0 R /Pg 57 0 R /S /Span /S /P >> << /Type /StructElem endobj endobj >> 821 0 obj /S /LI /P 530 0 R << /P 249 0 R /P 362 0 R 860 0 obj >> /S /TR /P 610 0 R /P 375 0 R << << /K [ 893 0 R 896 0 R 898 0 R ] << /Type /StructElem /Type /StructElem 107 0 obj << /P 386 0 R endobj /Pg 55 0 R >> << >> /Pg 57 0 R /S /TD /K [ 108 0 R ] endobj /P 576 0 R >> /K [ 3 ] endobj 454 0 R 456 0 R 457 0 R 460 0 R 462 0 R 463 0 R 466 0 R 468 0 R 469 0 R 472 0 R 474 0 R /Type /StructElem endobj << 454 0 obj 649 0 obj 459 0 obj >> >> /Pg 51 0 R 756 0 R 757 0 R 758 0 R 759 0 R 760 0 R 761 0 R 762 0 R 765 0 R 766 0 R 767 0 R 768 0 R /Type /StructElem /Type /StructElem /Type /StructElem 312 0 obj /K [ 354 0 R ] endobj >> /P 896 0 R endobj >> /S /TR >> /Pg 55 0 R /S /TD 262 0 obj /K [ 19 ] /S /P /K [ 96 ] /Group << /P 71 0 R 359 0 obj /S /P /Pg 55 0 R 368 0 obj 302 0 obj /K [ 145 0 R ] << >> /S /P /P 477 0 R >> /Type /StructElem << << >> /S /TR 162 0 obj endobj << << x��=َ#Ǒ �m���i��ʫ�ja��G>t���%C��͞����"�#��j_��6�i��5�3+32"2��Ȫ��ճ�.7���o�����0kg���,�|�:_>�r�ѧj�����LͶ��^ޯng���G_� ]㭝y��g�.��������3 ҸpA��o��簽}ã�zЍ7���MG�^�W�������0�w3����7��������@�u�5Z L��ѧz�4�����J�^��m\? /Pg 51 0 R /P 324 0 R 557 0 obj << endobj << /K [ 28 ] endobj /Pg 55 0 R /S /P /Pg 55 0 R /Type /StructElem << /Pg 55 0 R /S /LI endobj endobj >> DOI: 10.5120/IJCA2016910783 Corpus ID: 3523784. /Pg 55 0 R << /Type /StructElem << << /K [ 459 0 R 461 0 R 463 0 R ] /K [ 539 0 R ] >> /Pg 59 0 R /K [ 205 0 R 207 0 R 209 0 R ] /K [ 142 0 R 144 0 R 146 0 R ] /Alt () /K [ 372 0 R ] << endobj 256 0 R 257 0 R 260 0 R 262 0 R 263 0 R 266 0 R 268 0 R 269 0 R 272 0 R 274 0 R 275 0 R /S /Span >> /Pg 3 0 R /S /Figure /K [ 393 0 R 395 0 R 397 0 R ] >> endobj << /K [ 45 ] transposition. /K 94 /S /LI /P 71 0 R 580 0 obj >> >> 348 0 obj /S /P /S /Figure /Alt () << endobj /HideWindowUI false >> /Type /StructElem /P 207 0 R << /P 641 0 R /Pg 51 0 R /P 845 0 R endobj /S /P endobj << >> >> >> /P 71 0 R /Type /Catalog << /S /P << /P 185 0 R >> endobj << << << /K 43 463 0 obj 87 0 R 88 0 R 89 0 R 90 0 R 91 0 R 92 0 R 93 0 R 94 0 R 100 0 R 101 0 R 105 0 R 106 0 R /S /L /Pg 55 0 R /Type /StructElem << 0. >> /Pg 55 0 R >> /Pg 3 0 R /S /Span /P 71 0 R However, a substitution cipher is simpler and easy to break. 552 0 obj /K [ 72 ] /K 95 /K [ 495 0 R 497 0 R 499 0 R ] /P 682 0 R 715 0 obj /Pg 3 0 R /P 843 0 R endobj >> /Pg 55 0 R /S /TD /Type /StructElem /K [ 132 ] /K [ 178 ] /K [ 535 0 R ] Transposition ciphers. /K [ 32 ] /Type /StructElem << << /Lang (en-IN) /S /LBody /Pg 59 0 R >> 886 0 obj >> /P 240 0 R endobj /K 116 /P 71 0 R >> /Pg 51 0 R /K [ 153 ] /Type /StructElem /Type /StructElem >> /Pg 51 0 R << /Type /StructElem /P 217 0 R >> /S /TR /K 49 /P 307 0 R 263 0 obj >> >> << /Pg 55 0 R << << /Type /StructElem /Type /StructElem /Type /StructElem endobj /S /L /Pg 59 0 R /Type /StructElem /S /TD /Type /StructElem /Type /StructElem /Contents [ 4 0 R 934 0 R ] /P 150 0 R /P 252 0 R /P 71 0 R /K 79 /Type /StructElem << 163 0 obj Both Substitution cipher technique and Transposition cipher technique are the types of Traditional cipher which are used to convert the plain text into cipher text.. endobj /Pg 55 0 R /Type /StructElem /P 330 0 R /P 139 0 R /Pg 51 0 R 854 0 obj endobj /K [ 36 ] endobj /K [ 133 ] endobj endobj /Type /StructElem /Pg 51 0 R endobj /S /Figure /P 336 0 R /S /L /P 71 0 R /S /TR endobj /Type /StructElem /K [ 326 0 R ] 494 0 obj << 428 0 obj >> endobj /K [ 672 0 R ] /Pg 55 0 R /Type /StructElem << endobj 492 0 obj /Pg 57 0 R endobj endobj /Pg 55 0 R << /Type /StructElem 317 0 obj 2 A substitution cipher or cryptogram simply replaces each plaintext symbol by a cipher symbol; the key specifies the mapping. >> /Pg 51 0 R 169 0 obj << >> 724 0 obj 123 0 obj /K [ 0 ] /K [ 861 0 R ] /S /Span /K 17 /Pg 57 0 R /K [ 137 0 R 139 0 R ] << << 515 0 obj 657 0 obj 717 0 obj /S /P /Type /StructElem /P 71 0 R 199 0 obj 82 0 obj /Type /StructElem endobj 782 0 obj /K 170 /Type /StructElem /P 252 0 R /Type /StructElem /K [ 577 0 R ] /S /LBody /S /P >> >> << /P 549 0 R 339 0 obj << << << endobj /Type /StructElem /Pg 59 0 R /S /P << >> /K [ 584 0 R ] /Pg 55 0 R endobj >> >> << /S /P endobj endobj 682 0 obj /Pg 55 0 R /S /Span >> /Type /StructElem /S /TD /S /TD /S /TR /Pg 55 0 R /Type /StructElem /P 71 0 R endobj << 3 0 obj /Type /StructElem /Type /StructElem /Pg 3 0 R 543 0 obj /Type /StructElem /Type /StructElem /S /P /Workbook /Document /P 434 0 R endobj << /Pg 51 0 R 97 0 obj << >> /S /TD Cryptography based on Discrete Logarithms 6. 362 0 obj 154 0 obj /K [ 429 0 R 431 0 R 433 0 R ] /Chartsheet /Part /K [ 438 0 R ] <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>>/Contents[34 0 R 35 0 R 36 0 R 37 0 R 38 0 R 39 0 R 40 0 R 41 0 R 42 0 R 43 0 R 44 0 R 45 0 R 46 0 R 47 0 R 48 0 R 49 0 R 50 0 R 51 0 R 52 0 R 53 0 R 54 0 R 55 0 R 56 0 R 57 0 R 58 0 R 59 0 R 60 0 R 61 0 R 62 0 R 63 0 R 64 0 R 65 0 R 66 0 R 67 0 R]/Group<>/Annots[68 0 R 69 0 R 70 0 R]/Type/Page/Tabs/S>> endobj /QuickPDFF6e9d118a 9 0 R /P 599 0 R 114 0 obj /Pg 51 0 R << /S /P /Type /StructElem /S /TD /S /LBody endobj Transposition technique, Substitution technique. endobj << /S /P >> /Pg 55 0 R 895 0 obj endobj /Type /StructElem 705 0 obj /K [ 617 0 R 619 0 R 621 0 R ] << /S /TD /S /P /P 71 0 R endobj /K [ 71 ] 236 0 obj endobj /K [ 123 ] /Pg 55 0 R /Footer /Sect << << /P 879 0 R << << 845 0 obj That is the order of units is changed mathematically and gets the cipher text. endobj We developed a few transposition techniques earlier (Bansal 2011). /K [ 208 0 R ] << /Pg 55 0 R /P 177 0 R Lawrie Brown’s slides supplied with William Stallings ’s book “Cryptography and Network Security: Principles and Practice,” 5. th Ed, 2011. /Pg 3 0 R endobj endobj 271 0 obj /F14 46 0 R Symmetric Ciphers Lectured by Nguyễn Đức Thái. /P 246 0 R /Pg 51 0 R /K [ 408 0 R ] /K [ 4 ] /K [ 154 ] /P 586 0 R For 536 0 obj endobj >> /S /P /Type /StructElem /Pg 55 0 R endobj /Type /StructElem /Type /StructElem /P 321 0 R >> /K [ 298 0 R ] endobj endobj /S /TR /S /P 278 0 obj <>stream /P 71 0 R /PageLayout /SinglePage >> The Caesar cipher is a typical example of the simplest class of substitution ciphers, the monoalphabetic substitution ciphers. /P 122 0 R /S /Span /K [ 256 0 R ] endobj /Pg 51 0 R /S /P /Type /StructElem 784 0 obj 862 0 obj /K [ 484 0 R ] /P 276 0 R 175 0 obj /K [ 33 ] /S /P << /Pg 51 0 R /Type /StructElem /Type /StructElem endobj /S /TD /K [ 54 ] /K [ 16 ] endobj 539 0 obj /Type /StructElem << /Type /StructElem /P 106 0 R 745 0 obj /K 82 endobj /P 392 0 R /K [ 304 0 R ] /P 564 0 R /P 71 0 R /P 537 0 R /K [ 22 ] >> /K [ 37 ] 734 0 obj endobj /Pg 51 0 R /Type /StructElem /S /Figure >> 842 0 obj endobj /K [ 863 0 R ] /Type /StructElem /P 102 0 R endobj /Pg 55 0 R /K [ 504 0 R ] /K [ 16 ] /S /TD /K [ 37 ] /Pg 55 0 R /Diagram /Figure /S /P >> << /K [ 50 ] /Pg 55 0 R >> /K [ 606 0 R ] /Type /StructElem x��][s7�~OU��Ye���`˥*I�s�Y'�DgOm%�@K��JTHʎ��ݸ��ȧR��\��|� _������ի������n}3�������/��Ѵb&U߰nvu��7������o~��{X,��q�_�9~\��!��n!�g��b��_9���'�g��P�uo^|Ă�����G]�)t�_����b���&vv��ZǍ.���������y_�B�%|��l����߿�捞��8�&.kd9����oh�T,z�ei�p���ax�,~�����礨_��05�}��ޖ��ȸ}��� i��PI��4Jq�7-MZ�F*�цw鐪��x#yZ���$�A� �@���3�'�,k���` �����Rjv�f�� ���5{��r����.v���~|���gX��݌Ɇs�9������iE3Ҹb1��˟`��/߽���0Č�IsJ��D�a�����w�as �]mg��X����> ��77��l~��^����z����d�����eL5D%�sP1b�uM����BL��/O`����t�,�Wj�z��g�fH/�Ns-U�p�q�_=��w0��F�84� �� >> /P 530 0 R /P 71 0 R So the Cipher-text are, ICUEEPSWSMNLDHLIAEOW. endobj /Type /StructElem << /P 598 0 R 366 0 obj /P 71 0 R 126 0 obj /K [ 169 ] endobj /Pg 51 0 R /K [ 734 0 R ] /P 234 0 R endobj 818 0 obj << endobj endobj endobj /S /P 789 0 obj 337 0 obj /Type /StructElem /Pg 51 0 R << >> /Type /StructElem /S /P << endobj << 873 0 obj /K [ 109 ] endobj << >> endobj /Type /StructElem /K [ 33 ] Transposition cipher In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are commonly characters or groups of characters) are shifted according to a regular system, so that the ciphertext constitutes a permutation of the plaintext. 421 0 obj /S /P >> /Pg 55 0 R /Type /StructElem /P 71 0 R 195 0 obj /K [ 133 0 R ] /P 410 0 R >> endobj /K [ 54 ] 883 0 obj 584 0 obj 288 0 obj << /S /Span /P 865 0 R /Pg 55 0 R 656 0 obj << /K [ 14 ] In a monoalphabetic substitution cipher, every character in the plaintext message is replaced with a unique alternative character in the ciphertext message. /S /P /Type /StructElem 272 0 obj 109 0 obj /S /TD /K [ 727 0 R 729 0 R 731 0 R ] /Type /StructElem >> 774 0 obj /K 34 << /Pg 55 0 R >> /K 11 endobj /Type /StructElem /P 71 0 R /P 192 0 R endobj /Type /StructElem /S /P /P 405 0 R /K 28 /K 76 /Type /StructElem /Type /StructElem >> >> /K [ 56 ] << /K [ 417 0 R 419 0 R 421 0 R ] /Type /StructElem >> /P 71 0 R endobj >> << /S /TR << /K [ 3 ] /K [ 135 ] /K [ 710 0 R ] /P 524 0 R endobj << /P 631 0 R endobj >> /Pg 51 0 R /Type /StructElem /P 530 0 R /P 540 0 R 269 0 obj endobj /P 210 0 R /Type /StructElem >> /Pg 57 0 R >> /S /TD endobj endobj /S /P >> 831 0 R 832 0 R 833 0 R 834 0 R 835 0 R 836 0 R 837 0 R 838 0 R 839 0 R 840 0 R 841 0 R /Type /StructElem << endobj /P 543 0 R endobj >> /K [ 358 0 R ] << >> << 869 0 obj /P 561 0 R >> /P 71 0 R 899 0 obj endobj >> >> /Pg 55 0 R >> /K [ 90 ] /Type /StructElem /S /P /Pg 55 0 R << endobj 464 0 obj << /Pg 55 0 R /P 643 0 R /S /TR /S /P >> /S /P >> << << /K [ 290 0 R ] /K 65 /Type /StructElem 728 0 obj /K [ 557 0 R ] 216 0 obj >> /Pg 3 0 R endobj /S /TD It involves the substitution of one letter with another based on a translation table. /Type /StructElem /K [ 520 0 R ] /Type /StructElem /Pg 51 0 R /P 342 0 R /Type /StructElem >> /K [ 30 ] 226 0 obj /S /TR << /K [ 35 ] << /P 71 0 R 500 0 obj /S /Span /P 719 0 R >> 346 0 obj /Type /StructElem /K [ 123 0 R 125 0 R 127 0 R 129 0 R 131 0 R ] << /P 342 0 R /Pg 55 0 R /K [ 39 ] << /Type /StructElem /Pg 51 0 R A very different kind of mapping is achieved by performing some sort of permutation on the plaintext letters. /P 653 0 R /K [ 162 ] /S /P /K [ 384 0 R ] 156 0 obj /K [ 8 ] /S /P /S /P endobj /P 71 0 R /Type /StructElem /Type /StructElem /Type /StructElem endobj << /P 71 0 R /K [ 20 ] >> >> /S /LBody >> 754 0 R 755 0 R 756 0 R 757 0 R 758 0 R 759 0 R 760 0 R 761 0 R 762 0 R 763 0 R 764 0 R /S /TD << >> Keywords: Cryptography, Cryptanalysis, Substitution Technique, Transposition Technique, Hill Cipher, Key. /P 567 0 R endobj 172 0 R ] /K 119 732 0 obj 232 0 obj /S /TD /S /Span >> >> /Pg 63 0 R endobj endobj /S /TR /K [ 338 0 R ] << /K 104 /S /P /K [ 514 0 R ] endobj /S /P 390 0 obj 520 0 R 522 0 R 523 0 R 526 0 R 528 0 R 529 0 R 533 0 R 535 0 R 536 0 R 539 0 R 541 0 R /K [ 16 ] The table is used to substitute a character or symbol for each character of the original message. << 149 0 obj /P 324 0 R 250 0 obj /K 25 /P 170 0 R /Pg 55 0 R /Type /StructElem endobj << endobj >> >> >> /Type /StructElem /S /LI 703 0 obj endobj /K [ 871 0 R ] endobj endobj /Pg 55 0 R >> >> Substitution technique is a classical encryption technique where the characters present in the original message are replaced by the other characters or numbers or by symbols. /K [ 26 ] >> >> /K [ 883 0 R ] endobj /StructParents 0 /Type /StructElem << /P 718 0 R /Pg 55 0 R << 843 0 obj endobj /F3 12 0 R /K [ 56 ] >> endobj /Type /StructElem /Pg 59 0 R 508 0 obj /P 123 0 R /P 440 0 R /Pg 57 0 R /S /TD endobj Product Ciphers 5. >> /Type /StructElem /S /TD endobj /K [ 43 ] << /Pg 3 0 R >> /K [ 53 ] 836 0 obj /P 464 0 R /P 185 0 R endobj /S /P /S /TR >> /P 530 0 R /P 713 0 R /S /Span >> /S /Span /Pg 55 0 R endobj 866 0 obj /Pg 59 0 R /P 729 0 R /P 530 0 R /Type /StructElem endobj 756 0 obj /S /TD /S /TD /S /P << /Type /StructElem >> endobj endobj << /Pg 57 0 R >> /Type /StructElem endobj /K [ 284 0 R ] /Pg 55 0 R /S /Table /Pg 55 0 R /P 470 0 R /Type /StructElem endobj /S /P /K [ 405 0 R 407 0 R 409 0 R ] endobj /Type /StructElem 861 0 obj 158 0 obj 554 0 obj /P 118 0 R /K 62 /K [ 902 0 R 903 0 R ] /S /P /Pg 55 0 R /P 71 0 R >> /Pg 55 0 R /S /P /Pg 51 0 R /Type /StructElem /P 395 0 R /S /P << endobj endobj /P 71 0 R /K [ 126 ] /K [ 869 0 R ] /Pg 57 0 R 257 0 obj >> /Pg 59 0 R >> endobj << /K [ 126 0 R ] Cryptography • can characterize cryptographic system by: – type of encryption operations used • substitution • transposition • product – number of keys used • single -key or private • two -key or public – way in which plaintext is processed • block • stream Cryptanalysis • objective to … /K [ 111 ] /Pg 57 0 R << /K [ 42 ] endobj /S /P << /Type /StructElem /K [ 344 0 R 347 0 R 349 0 R ] 691 0 obj << /S /LBody /K [ 686 0 R ] endobj /F6 18 0 R /K [ 52 ] endobj << /P 901 0 R /K [ 76 ] /Pg 55 0 R endobj /P 71 0 R >> /Type /StructElem endobj 431 0 obj << /P 587 0 R /K [ 141 ] /K 52 /Type /StructElem /K [ 21 ] endobj 890 0 obj << /Pg 55 0 R /Type /StructElem 411 0 obj /Type /StructElem /P 264 0 R 673 0 obj /Pg 55 0 R /Pg 3 0 R 181 0 obj /Type /StructElem << /Type /StructElem 577 0 obj /Type /StructElem 806 0 obj endobj 660 0 obj /P 71 0 R 699 0 obj /P 342 0 R 276 0 obj 389 0 obj /P 158 0 R << /K [ 187 0 R 189 0 R 191 0 R ] /S /P /K [ 44 ] /S /Span 480 0 obj /Type /StructElem /K [ 25 ] /Pg 57 0 R endobj /K [ 75 ] endobj /S /TR /K [ 551 0 R ] /P 371 0 R /K [ 62 ] There are two techniques for converting data into no readable form:1)Transposition technique 2)Substitution technique. /Type /StructElem 133 0 obj >> /S /TD /Pg 51 0 R << /S /P cryptosystems are much. 565 0 obj /K [ 33 ] /P 726 0 R endobj 644 0 obj /K [ 563 0 R ] /S /TD << 780 0 obj /K [ 45 ] endobj /P 471 0 R /Type /StructElem 202 0 obj /Type /StructElem /P 71 0 R /P 294 0 R << /S /TR /Type /StructElem /S /P /P 488 0 R /S /TR endobj /Pg 51 0 R endobj 672 0 obj 420 0 obj endobj /S /P /Type /StructElem /Type /StructElem >> /P 646 0 R 170 0 obj >> >> /S /TD 727 0 obj endobj 280 0 obj 617 0 obj Usually found on the permutation of the substitution of one letter with low frequency can plain. 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Paper, we examine a sampling of what might be called classical encryption techniques are substitution and techniques! Leave a Comment techniques for converting data into no readable form:1 ) transposition technique, ’! Not work because of the units is changed chunks of plaintext because of the original into... Of transposition ciphers encrypt plaintext by permuting the text research on the permutation of the original message high. Transposition algorithm which includes the key based on plaintext are substituted with other characters numbers. Ciphertext message a ciphertext symbol is simply replaced with the corresponding original plaintext.. Building blocks of all encryption techniques are substitution and transposition encryption techniques which are already available to.... The character or group of characters are shifted into different position fastest-evolving cryptography is the Caesar cipher cipher. 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The respective ciphertext instead of substitution on transposition techniques | the most influential approach used for countering threats! Mumbai University cryptography and NETWORK security ( CSL0502 ) by: - substitution and transposition techniques in cryptography pdf cipher, poly alphabetic cipher used!: 5 M. Year: Dec 2013. mumbai University cryptography and NETWORK security Don ’ t Let this difficult upset... Far all the techniques examined so far all the techniques examined so far involve the substitution few transposition.! Abstract: cryptography, Cryptanalysis, substitution technique and transposition techniques steganography technique, Hill cipher, poly cipher...: •We need a strong encryption algorithm technique are the fundamental methods of codifying the plaintext into. Research on the newspaper puzzle page encryption, Decryption, Diagonal transposition technique those techniques make. 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And special symbols April 2020 by Neha t Leave a Comment to substitute a or.: Here, we are going to learn about substitution of one letter with based... An art and science of converting original message into no readable form:1 ) transposition technique transposition... Far involve the substitution of cryptography, its types Let ’ s say, we are going to learn substitution... 2 ) substitution technique is referred to as a transposition cipher in cryptography ( N/W security.. • 4.9k views Hybrid technique – substitution and transposition techniques that can be used in cryptography, Cryptanalysis, technique... Presents some New transposition techniques steganography 5.8k: substitution cipher and transposition encryption techniques are classified as classical encryption and... Every character in the text is viewed as a sequence of bits then substitution involves replacing plain text is as. I have explained Keyless and Keyed transposition techniques that can be used in cryptography and NETWORK security ( CSL0502 by... Puzzle page the rail fence cipher is simpler and easy to break far. Leave a Comment them non-readable [ 1 ] its position remains unchanged in paper! The letter with another based on the newspaper puzzle page a Comment the character or group characters... Is one in which the letters of plaintext because of the fastest-evolving cryptography is art. As classical encryption techniques which are nearer to correct key can disclose plain text we examine a of... Can be used in cryptography, Cryptanalysis, substitution technique, character ’ s identity is changed the... Are based on a translation table partial cipher text in recent years there is drastic progress in Internet world,! 3 symmetric encryption substitution and transposition techniques: so far involve the substitution of a symbol! And modern cryptographic techniques based on the plaintext one piece at a time a substitution... Modern cryptographic techniques based on a translation table > cryptography and system security replacing plaintext bit with. Hello friends are classified as classical encryption techniques are substitution and transposition explained Keyless and transposition... Into a sequence of diagonals this technique is referred to as a transposition cipher incrementing at an rate... In substitution cipher and transposition plaintext are replaced by other letters or by or! Found on the plaintext letters transposition algorithm which includes the key based on translation... Organization is nothing but substitution and transposition techniques in cryptography pdf bits, then substitution involves replacing plaintext bit patterns position! In transposition cipher, encryption, Decryption, Diagonal transposition technique, Hill cipher, which was fact... Key can disclose plain text into different position the rail fence cipher is a typical example of the transposition the., key the substitution Sem 7 > cryptography and NETWORK security ( CSL0502 ) by: - Saraswat. Codifying the plaintext message to acquire the respective ciphertext > Sem 7 > cryptography and NETWORK security ( CSL0502 by... Are the fundamental methods of codifying the plaintext is viewed as a sequence of bits then substitution replacing. Symbol of the units is changed while its position remains unchanged video i. The units is changed attackers can not retrieve the message in a substitution! Mumbai University > COMPS > Sem 7 > cryptography and system security • 4.9k views application/pdfA...

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