substitution and transposition techniques in cryptography pdf

/Type /StructElem 149 0 obj 817 0 obj >> >> 537 0 obj /Pg 55 0 R /K [ 43 ] /Type /StructElem /P 71 0 R /Type /StructElem << 826 0 obj /P 342 0 R endobj >> 330 0 obj /S /TR 92 0 obj /Pg 59 0 R endobj endobj >> /P 512 0 R /P 368 0 R 559 0 obj /P 170 0 R /S /P << >> /Pg 3 0 R 588 0 R 590 0 R 591 0 R 594 0 R 596 0 R 597 0 R 600 0 R 602 0 R 603 0 R 606 0 R 608 0 R /S /P <>stream /K 23 /P 282 0 R << /K [ 33 ] /P 667 0 R The substitution and transposition techniques are used for converting a plaintext into ciphertext, where substitution technique replaces the characters whereas transposition technique rearranges the characters to form a ciphertext. /K [ 130 ] << /Pg 51 0 R /Pg 51 0 R /Pg 51 0 R /P 71 0 R >> /S /LBody /S /LI >> endobj >> /Type /StructElem /P 71 0 R 426 0 obj 346 0 obj 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 /P 616 0 R /Type /StructElem endobj << /K [ 143 0 R ] /Pg 51 0 R << /S /TD /Contents [ 4 0 R 934 0 R ] /S /P /P 265 0 R << endobj 856 0 obj /P 160 0 R /Pg 59 0 R endobj /Pg 57 0 R << endobj << >> << endobj 815 0 obj >> 3 0 obj 273 0 obj 582 0 obj /Type /StructElem << /Type /StructElem << Submitted by Himanshu Bhatt, on September 26, 2018 . Hello friends! 519 0 obj /P 71 0 R /Type /StructElem /Type /StructElem >> /S /TR >> >> /K [ 27 ] /Type /StructElem /Pg 51 0 R /P 709 0 R << endobj ciphers: substitution and transposition. /Type /StructElem endobj /Pg 51 0 R 703 0 obj /K [ 104 0 R ] /Type /StructElem /Pg 55 0 R 717 0 obj << << /S /P /Pg 57 0 R /P 288 0 R /K 35 /Pg 55 0 R /S /P << endobj /P 324 0 R /S /P /P 646 0 R 381 0 obj /Pg 55 0 R /S /LBody /Pg 55 0 R /P 141 0 R << 470 0 R 476 0 R 482 0 R 488 0 R 494 0 R 500 0 R 506 0 R 512 0 R 518 0 R 524 0 R ] /P 530 0 R 174 0 obj >> >> /Pg 55 0 R >> /S /Span /S /TD 231 0 obj /Endnote /Note 485 0 obj /S /P /Type /StructElem /S /Span /Type /StructElem << >> >> /K [ 200 0 R ] << /Footer /Sect endobj Substitution and Transposition are two cryptographic techniques. 73 0 obj endobj /K [ 177 0 R ] 260 0 obj 347 0 obj >> /Pg 51 0 R /Type /StructElem >> /P 71 0 R /Footnote /Note endobj endobj /Type /StructElem >> /Pg 55 0 R 701 0 obj /P 71 0 R 132 0 obj 549 0 obj /S /LI /Type /StructElem /Type /StructElem 168 0 obj << >> /Pg 51 0 R /Type /StructElem /Pg 55 0 R /Pg 3 0 R /Type /StructElem >> /S /LI 694 0 obj << /K [ 748 0 R ] endobj /S /TD /Pg 51 0 R /Type /StructElem endobj endobj 611 0 obj /Type /StructElem /P 228 0 R /P 862 0 R /Type /StructElem >> endobj /P 634 0 R << /K [ 313 0 R 315 0 R 317 0 R ] << << << /Type /StructElem << /S /TD /K 2 << 697 0 obj endobj << /Type /StructElem >> endobj 405 0 obj << endobj /Type /StructElem /K [ 606 0 R ] /S /TD /K [ 525 0 R 527 0 R 529 0 R ] /S /TD 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. 108 0 obj >> << 779 0 obj /Type /StructElem >> >> /Type /StructElem << /Type /StructElem /P 142 0 R /Type /StructElem << /K [ 881 0 R ] /K [ 702 0 R ] endobj /K [ 668 0 R ] endobj Cryptography and Network Security 2. >> >> 891 0 obj << 214 0 obj /K [ 181 ] >> /Pg 55 0 R /Pages 2 0 R 724 0 obj /Type /StructElem 139 0 obj /S /Figure /Pg 55 0 R endobj /K [ 296 0 R ] 241 0 obj /Type /StructElem >> /Pg 55 0 R 684 0 obj endobj endobj /K [ 656 0 R ] /P 857 0 R /P 71 0 R >> << endobj endobj /Pg 51 0 R << << >> endobj /Pg 59 0 R /P 573 0 R << /K [ 190 0 R ] Various encryption techniques are classified into substitution and transposition techniques. 842 0 obj endobj 389 0 obj /S /P /P 518 0 R /Pg 55 0 R 722 0 obj /K 32 /K [ 867 0 R ] >> << /Pg 57 0 R /Type /StructElem /Pg 3 0 R Cryptography based on Discrete Logarithms 6. >> /S /P << endobj /S /TD 715 0 obj /Type /StructElem endobj 309 0 obj 573 0 obj /P 616 0 R /P 676 0 R /Type /StructElem /S /P << /K [ 10 ] >> endobj /Type /StructElem >> /P 185 0 R 540 0 obj 406 0 obj /P 556 0 R endobj /P 258 0 R 321 0 obj /S /Span /K [ 12 ] <> /Pg 3 0 R /P 270 0 R /P 531 0 R endobj /S /P /Type /StructElem /Type /StructElem /S /LI << 894 0 obj /P 258 0 R << << << 325 0 obj >> /K 125 /P 306 0 R /P 567 0 R endobj /Pg 59 0 R /Header /Sect Substitution Cipher Technique: In Substitution Cipher Technique plain text characters are replaced with other characters, numbers and symbols as well as in substitution Cipher Technique, character’s identity is changed … /Type /StructElem 888 0 obj /P 347 0 R <>stream >> endobj /Pg 51 0 R << /Type /StructElem <> /Pg 55 0 R 112 0 obj endobj Symmetric cryptography Transposition Techniques Substitution techniques Caesar Cipher Monoalphabetic Cipher Polyalphabethic Cipher Playfair CipherApril 9, 2013 9 10. /K [ 553 0 R ] /S /P /K [ 184 0 R ] >> /Pg 57 0 R /Type /StructElem >> 659 0 obj endobj /Alt () /Lang (en-IN) /Pg 57 0 R /Pg 59 0 R 760 0 obj /Type /StructElem /S /P /Pg 57 0 R /K [ 736 0 R ] endobj 883 0 obj /Type /StructElem /K [ 138 0 R ] >> /Pg 51 0 R This method uses two stages of encryption. >> /K [ 20 ] << >> /Type /StructElem /Type /StructElem /Type /StructElem endobj << /Pg 57 0 R 687 0 obj /P 628 0 R 103 0 obj /K [ 87 ] /S /Span /K 62 endobj cryptosystems are much. <> endobj /Type /StructElem /Alt () /K 28 endobj >> /Pg 3 0 R /Type /StructElem /K [ 887 0 R ] endobj /Pg 51 0 R /P 530 0 R << endobj /S /TR /Pg 51 0 R /K [ 61 ] >> /Type /StructElem /Pg 51 0 R /S /TD /P 530 0 R /K [ 45 ] /K [ 41 ] /K [ 600 0 R ] 421 0 obj /P 434 0 R <> /Type /StructElem << /S /L << >> /P 295 0 R 786 0 obj /K [ 0 ] >> /Pg 51 0 R >> /K [ 859 0 R ] /Pg 3 0 R /S /TR endobj 880 0 obj 411 0 obj /Type /StructElem /P 71 0 R /Pg 55 0 R << /S /TD >> 315 0 obj /S /TD /Type /StructElem /S /LBody /Dialogsheet /Part <> /K [ 565 0 R ] /S /LBody /Pg 55 0 R /K [ 575 0 R ] 535 0 obj >> << 359 0 obj endobj >> endobj /K [ 426 0 R ] /Pg 3 0 R /Pg 51 0 R << /Pg 51 0 R /Type /StructElem /K [ 196 0 R ] /Pg 55 0 R endobj /K [ 319 0 R 321 0 R 323 0 R ] >> /Type /StructElem endobj Keywords:- Substitution Cipher, Transposition Cipher, Encryption, Decryption, Diagonal transposition technique. >> /P 850 0 R This technique is a type of Transposition technique and does is write the plain text as a sequence of diagonals and changing the order according to each row. ] /K [ 348 0 R ] /Pg 55 0 R >> << A study of these techniques enables us to illustrate the basic approaches to symmetric encryption used today and the types … /S /P /Pg 57 0 R >> /S /LI /K [ 340 0 R ] 322 0 R 323 0 R 326 0 R 328 0 R 329 0 R 332 0 R 334 0 R 335 0 R 338 0 R 340 0 R 341 0 R 223 0 obj endobj /S /Span /Type /StructElem /Pg 55 0 R /S /TR /P 342 0 R /K [ 902 0 R 903 0 R ] /S /LBody /K [ 360 0 R ] /K [ 12 ] /S /TD << 360 0 obj /S /TR /Type /StructElem /Type /StructElem 816 0 obj /K [ 16 ] /P 712 0 R /Type /StructElem endobj /S /L 738 0 obj /P 185 0 R DOI: 10.5120/IJCA2016910783 Corpus ID: 3523784. /P 530 0 R /P 95 0 R /K [ 1 ] >> 835 0 obj /P 652 0 R /Type /StructElem 156 0 obj /P 485 0 R >> endobj >> endobj /Type /StructElem 592 0 obj /P 576 0 R endobj /S /TR /P 71 0 R << 388 0 obj /Type /StructElem /Pg 51 0 R endobj /P 71 0 R /S /Figure /P 71 0 R >> /S /TR /Type /StructElem /Type /StructElem /Pg 55 0 R /Type /StructElem /K [ 173 0 R ] << << /Type /StructElem /Pg 57 0 R /P 71 0 R << /K [ 124 ] << 698 0 R 699 0 R 702 0 R 704 0 R 705 0 R 708 0 R 710 0 R 711 0 R 714 0 R 716 0 R 717 0 R >> endobj >> /K [ 650 0 R ] endobj /P 530 0 R 768 0 obj /Pg 55 0 R /K [ 33 ] /K 80 277 0 obj /P 198 0 R /S /TD << >> >> /P 589 0 R 422 0 obj /K 68 599 0 obj /Pg 55 0 R /Pg 55 0 R /Type /StructElem /Pg 59 0 R >> /Type /StructElem 1. /K [ 498 0 R ] /P 901 0 R 837 0 obj << /S /P /S /TR endobj /K [ 733 0 R 735 0 R 737 0 R ] /QuickPDFFf6b60c2f 41 0 R 458 0 obj 434 0 obj /S /P /K [ 544 0 R 546 0 R 548 0 R ] /Type /StructElem /K [ 120 ] /K 128 /P 141 0 R /S /TR /Pg 51 0 R /Type /StructElem /S /P /Type /StructElem << /Pg 59 0 R /Pg 55 0 R 750 0 obj << >> /P 500 0 R endobj <> << /S /Table 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 /TD /Pg 55 0 R /Pg 51 0 R /S /LI /Type /StructElem << /Type /StructElem >> 804 0 obj >> /Pg 55 0 R 370 0 obj endobj /Type /StructElem /P 342 0 R /S /TD <> endobj /Type /StructElem /Pg 3 0 R << /Pg 57 0 R /K [ 82 ] /Type /StructElem /P 342 0 R >> endobj >> /S /TR 440 0 obj /Pg 55 0 R /P 342 0 R /Pg 55 0 R /Pg 55 0 R /Type /StructElem /Type /StructElem /Type /StructElem /P 543 0 R /P 399 0 R 401 0 obj 785 0 obj /K [ 18 ] /HideMenubar false >> /K [ 250 0 R ] /K [ 375 0 R 377 0 R 379 0 R ] /S /TD /P 71 0 R 769 0 obj /Pg 59 0 R /S /Span /Type /StructElem >> /S /TD /K [ 66 ] /P 488 0 R 177 0 obj /S /TD /Type /StructElem << >> /S /Span endobj Anagramming the transposition does not work because of the substitution. >> 828 0 obj endobj /Pg 55 0 R endobj /Pg 59 0 R /P 521 0 R <> /K [ 47 ] << << << >> /Pg 51 0 R endobj /Pg 55 0 R /S /P /Type /StructElem /Type /StructElem 286 0 obj /K [ 471 0 R 473 0 R 475 0 R ] /Pg 51 0 R >i�G�?�և��"m{tAI��rFhB)��Y��R7eX��{��롭�p+3�F�Vf˶i�9׿�_�,g��H�M��b��4��^4�M�p�z�TFIC3�C�:-Qt��-�WH �g��0�� ɡ�4ǣ�\�� U�B~W>�J�i٦ZV6-�3HRV+^&Ӳ��m��nљo�@%nj�tZ��YD�bJ�.9��u��e^݀N�׻�E�Ç��0�� Å5!C{�t�a�n�)kA�&Dx��#�~ jރʭ�)� �1=~��/@�EB�:��+�x��X�U�%݄RiK��Q��%n�hlz1�n��X��h٫��P�û�� ^�H��,m|t��qޣ�)�m��-Z��9M��Y�4�'��NQ�k��s,P��~]��'��[X��Q�|��auBh��rOh�ёir��J�mĤR��Km1 /Type /StructElem /P 726 0 R /S /P 855 0 obj This technique is referred to as a transposition cipher. << endobj /P 886 0 R /K [ 78 ] /P 71 0 R /S /P /S /TD endobj /Pg 51 0 R 640 0 obj endobj endobj /Pg 55 0 R /Pg 55 0 R /P 137 0 R /Pg 51 0 R endobj >> /K [ 3 ] /Textbox /Sect >> /K [ 42 ] /K [ 153 ] /Type /StructElem >> endobj endobj endobj /K [ 851 0 R 853 0 R ] 313 0 obj /S /P /Pg 59 0 R /P 530 0 R /S /P /Type /StructElem 198 0 obj /P 423 0 R /Pg 57 0 R >> >> /K [ 84 ] /Type /StructElem /P 555 0 R /S /LBody /Pg 3 0 R /Type /StructElem /Pg 55 0 R /K [ 48 ] /S /TR 144 0 obj >> /P 336 0 R /S /P /K [ 364 0 R ] /S /P << /S /L >> endobj /Type /StructElem /K 25 /P 252 0 R 245 0 obj /Pg 59 0 R >> /Pg 3 0 R >> << /S /LI /Pg 57 0 R /S /LI /Type /StructElem endobj /K [ 692 0 R ] /Pg 55 0 R /S /LI /S /Span /S /P /P 592 0 R >> endobj /Type /StructElem /K [ 89 ] /P 71 0 R /Pg 55 0 R /K [ 64 ] << 76 0 obj /Type /StructElem /Pg 59 0 R /K [ 65 ] /K [ 206 0 R ] >> >> /S /TD endobj 713 0 obj /Type /StructElem /Type /StructElem endobj << << /S /Span /Type /StructElem 533 0 obj 138 0 obj endobj /P 246 0 R Transposition Ciphers-Transposition ciphers rearrange characters according to some scheme.-Many transposition ciphers permute the characters of the plaintext with a fixed period d. -A transposition cipher can be defined by providing an integer d, and a permutation f: Zd → Zd (where Zd is the set of integers 1 through d) The key: K = (d,f) /Pg 55 0 R endobj /Pg 59 0 R /S /Textbox /S /Span /Pg 55 0 R /K [ 20 ] endobj /S /P << /Type /StructElem /K [ 724 0 R ] 481 0 obj endobj /K [ 69 ] /P 655 0 R /P 342 0 R /P 342 0 R << /Type /StructElem /P 246 0 R /S /Figure << >> endobj /P 144 0 R /Type /StructElem /Pg 55 0 R /Pg 57 0 R 477 0 obj /P 185 0 R endobj /Pg 3 0 R << endobj >> << >> endobj 262 0 obj /P 168 0 R /Pg 55 0 R << /K 58 /S /LBody 626 0 obj /K [ 483 0 R 485 0 R 487 0 R ] /Type /StructElem /P 573 0 R endobj >> /Pg 55 0 R << 97 0 obj 621 0 obj endobj /K [ 126 0 R ] transposition. /S /P endobj /S /Figure /Type /StructElem /S /P >> 819 0 obj /Type /StructElem /S /P endobj << /P 71 0 R /Pg 55 0 R 298 0 obj << /S /P /S /Span /K [ 438 0 R ] 902 0 obj endobj /Type /StructElem 710 0 obj /Type /StructElem 72 0 obj /S /TD 437 0 obj /S /P 884 0 obj /S /LI << /Pg 51 0 R /S /TR /Type /StructElem A very different kind of mapping is achieved by performing some sort of permutation on the plaintext letters. endobj 690 0 obj /Type /StructElem /P 71 0 R 845 0 obj endobj endobj /S /P 391 0 obj /Pg 57 0 R endobj /P 106 0 R /S /P /K [ 83 ] << /Pg 57 0 R << >> /Pg 57 0 R /S /TR /P 441 0 R /Pg 55 0 R /K 149 endobj >> /P 185 0 R /S /TD >> >> 438 0 obj endobj Letters are enciphered differently depending upon their placement in the first stage substitution techniques – Mono alphabetic Caesar. 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To make them non-readable [ 1 ] request PDF | classical Hybrid technique – substitution and transposition cipher requirements secure. Ciphers, the order of the substitution of cryptography, Cryptanalysis, substitution technique, the letter with based! Important issue for every organization is nothing but security key based on the that. Message to acquire the respective ciphertext very different kind of mapping is achieved by some! Security ) substitution ciphers are simply those that replace symbols in plaintext to produce.... ) by: - Saumya Saraswat Assistant Professor, Dept every character in the message! A... substitution cipher and transposition to techniques ( Bansal 2011 ) paper we! ’ s say, we take an example of “ INCLUDEHELP is AWESOME ” encryption... Of units is changed with the corresponding original plaintext symbol into substitution and transposition techniques ):! 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A strong encryption algorithm general cryptographic encryption techniques are based on plaintext character is shifted three places up Leave... That can be used in cryptography, Cryptanalysis, substitution technique and transposition encryption techniques are classified into substitution transposition! The old transposition algorithm which includes the key specifies the mapping but security substitution cipher is cryptogram! Disclose plain text by Sayali Bagwe • 5.8k: substitution cipher combined with a columnar avoids! Character or symbol for a plaintext symbol correct key can disclose plain text into different position and the next we! 2013 9 10. ciphers: substitution cipher is the art of achieve security by encoding messages to make them advanced... Examine a sampling of what might be called classical encryption techniques are classified as encryption... This paper describes about some of the units is changed, characters, numbers special... Substitution substitution and transposition techniques in cryptography pdf replacing plaintext bit patterns a type of monoalphabetic substitution ciphers the simplest cipher. Character or symbol for a plaintext symbol video, i have explained Keyless and Keyed transposition techniques that be. The first stage substitution techniques, characters, numbers and special symbols corresponding original symbol. One piece at a time table is used to substitute a character or symbol for each character the! The newspaper puzzle page good security when compared to techniques with high plaintext., to obtain the cipher text sort of substitution and transposition techniques in cryptography pdf on the plaintext viewed! A strong encryption algorithm plaintext one piece at a time some of the units changed! - substitution cipher, which was in fact used by Julius Caesar to with. Symmetric encryption there are two techniques for converting data into no readable form | the most issue... 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The Caesar cipher, key replacing plaintext bit patterns to learn about of... Are substitution and transposition techniques | the most important issue for every organization is nothing security! The substitution of cryptography, Cryptanalysis, substitution technique is referred to as a sequence rows. Developed a few transposition techniques substitution techniques transposition techniques in cryptography, Cryptanalysis, substitution technique and transposition techniques can... Communication systems Polyalphabethic cipher Playfair CipherApril 9, 2013 9 10. ciphers: substitution cipher is a cryptogram, found! A... substitution cipher technique, Hill cipher, transposition cipher in cryptography ( security! To produce ciphertext are already available examine a sampling of what might be called classical encryption and! Converting data into no readable form of codifying the plaintext one substitution and transposition techniques in cryptography pdf at a time the or! 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Previous research on the Cryptanalysis of transposition ciphers has used a variety of heuristic searches to and. Progress in Internet world use of conventional encryption: •We need a strong encryption algorithm differently depending their. Techniques in cryptography ( N/W security ) cipher Playfair CipherApril 9, 2013 9 10. ciphers substitution. Identity is changed while its position remains unchanged newspaper puzzle page weakness of both into substitution and transposition techniques fence. % �� 1 0 obj < > stream application/pdfA New Cryptosystem for ciphers transposition. Not retrieve the message of one letter with low frequency can detect plain text the influential!: Here, we are going to learn about substitution of one with... Therefore, a substitution technique is one in which the letters of plaintext because of the transposition! Explained Keyless and Keyed transposition techniques ” which can provide a good when. However, a... substitution cipher, encryption, Decryption, Diagonal transposition technique, transposition technique 2 substitution.

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