220 Feistel PPTs View free & download

Feistel Cipher Structure PowerPoint PPT Presentation

Feistel Cipher Structure - Feistel Cipher Structure. Horst Feistel devised the feistel cipher. based on concept of invertible product cipher. partitions input block into two halves

Feistel Cipher Structure. Horst Feistel devised the feistel cipher. based on concept of invertible product cipher. partitions input block into two halves

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Feistel Networks made Public, and Applications. PowerPoint PPT Presentation

Feistel Networks made Public, and Applications. - With general FIL-MACs, need collision-resistant hash functions! CBC-MAC Popular domain extension technique for MACs Secure if FIL-MAC is a PRF [BKR94].

With general FIL-MACs, need collision-resistant hash functions! CBC-MAC Popular domain extension technique for MACs Secure if FIL-MAC is a PRF [BKR94].

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Claude Shannon and Substitution-Permutation Ciphers PowerPoint PPT Presentation

Claude Shannon and Substitution-Permutation Ciphers - S-P networks are based on the two primitive cryptographic operations ... Horst Feistel devised the feistel cipher. based on concept of invertible product cipher ...

S-P networks are based on the two primitive cryptographic operations ... Horst Feistel devised the feistel cipher. based on concept of invertible product cipher ...

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Cryptography Algorithms PowerPoint PPT Presentation

Cryptography Algorithms - Cryptography Algorithms Basics Block cipher, stream cipher Block size, key size Symmetric Algorithm DES (block size, key size) Feistel network Asymmetric Algorithm

Cryptography Algorithms Basics Block cipher, stream cipher Block size, key size Symmetric Algorithm DES (block size, key size) Feistel network Asymmetric Algorithm

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Symmetric Encryption PowerPoint PPT Presentation

Symmetric Encryption - Horst Feistel (IBM) invented the basic. algorithm in 1973. Feistel ciphers use. symmetric block ... Data Encryption Standard - an algorithm selected by the ...

Horst Feistel (IBM) invented the basic. algorithm in 1973. Feistel ciphers use. symmetric block ... Data Encryption Standard - an algorithm selected by the ...

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Design of Efficient Cryptographically Robust Substitution Boxes ---Search for an Efficient Secured Architecture PowerPoint PPT Presentation

Design of Efficient Cryptographically Robust Substitution Boxes ---Search for an Efficient Secured Architecture - ... NSA was secretly involved Design process not open Key length was reduced Subtle changes to Lucifer algorithm DES Numerology DES is a Feistel cipher 64 bit ...

... NSA was secretly involved Design process not open Key length was reduced Subtle changes to Lucifer algorithm DES Numerology DES is a Feistel cipher 64 bit ...

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CSCE 790G: Computer Network Security PowerPoint PPT Presentation

CSCE 790G: Computer Network Security - One of the most widely used types of cryptographic algorithms ... Decryption must unwind steps of data computation. With Feistel design, do encryption steps again ...

One of the most widely used types of cryptographic algorithms ... Decryption must unwind steps of data computation. With Feistel design, do encryption steps again ...

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Ch 3: Block Ciphers and Data Encryption Standard DES PowerPoint PPT Presentation

Ch 3: Block Ciphers and Data Encryption Standard DES - one of the most widely used types of cryptographic algorithms ... Horst Feistel devised the feistel cipher. based on concept of invertible product cipher ...

one of the most widely used types of cryptographic algorithms ... Horst Feistel devised the feistel cipher. based on concept of invertible product cipher ...

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Session 3: Secret key cryptography PowerPoint PPT Presentation

Session 3: Secret key cryptography - Block cipher encryption provides confidentiality by ... LUCIFER (author: Horst Feistel) DES (Data Encryption Standard) MISTY1. KASUMI (used in UMTS) ...

Block cipher encryption provides confidentiality by ... LUCIFER (author: Horst Feistel) DES (Data Encryption Standard) MISTY1. KASUMI (used in UMTS) ...

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Conventional Encryption: Modern Techniques PowerPoint PPT Presentation

Conventional Encryption: Modern Techniques - 2 S-boxes (4 bits in, 2 bits out) Five stages. Initial permutation (IP) ... In 1970's, Horst Feistel (IBM T.J. Watson Research Labs) invented a suitable ...

2 S-boxes (4 bits in, 2 bits out) Five stages. Initial permutation (IP) ... In 1970's, Horst Feistel (IBM T.J. Watson Research Labs) invented a suitable ...

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Conventional Encryption Message Confidentiality PowerPoint PPT Presentation

Conventional Encryption Message Confidentiality - Number of Alternative Keys. Key Size (bits) Henric Johnson. 7. Feistel ... Used between entities for the purpose of distributing session keys. Henric Johnson ...

Number of Alternative Keys. Key Size (bits) Henric Johnson. 7. Feistel ... Used between entities for the purpose of distributing session keys. Henric Johnson ...

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Block Ciphers and Data Encryption Standard DES PowerPoint PPT Presentation

Block Ciphers and Data Encryption Standard DES - They want to encrypt their message so Trudy who also happens to know a lot about ... Horst Feistel, working at IBM Thomas J Watson Research Labs devised a suitable ...

They want to encrypt their message so Trudy who also happens to know a lot about ... Horst Feistel, working at IBM Thomas J Watson Research Labs devised a suitable ...

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AES - Triple DES (112 bits) Two 56-bit keys; Same hardware/software. Encryption. C1 = DESEncrypt(P, k1) ... Most ciphers use a Feistel structure (some of the bits in ...

Triple DES (112 bits) Two 56-bit keys; Same hardware/software. Encryption. C1 = DESEncrypt(P, k1) ... Most ciphers use a Feistel structure (some of the bits in ...

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Cryptography PowerPoint PPT Presentation

Cryptography - Cryptography Block Ciphers and Feistel Functions * About the Speaker Chuck Easttom chuck@chuckeasttom.com www.ChuckEasttom.com Certifications A+,Network+, iNet+ ...

Cryptography Block Ciphers and Feistel Functions * About the Speaker Chuck Easttom chuck@chuckeasttom.com www.ChuckEasttom.com Certifications A+,Network+, iNet+ ...

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Como hacen cifrado de datos para Seguridad informatica en Mexico PowerPoint PPT Presentation

Como hacen cifrado de datos para Seguridad informatica en Mexico - El algoritmo mas común cifrado en México acuerdo con investigadores de seguridad informática en México es DEC. DES esta identificado como un cifrado Feistel que procesa bloques de texto plano de n = 64 bits, produciendo bloques de texto cifrado de 64 bits.

El algoritmo mas común cifrado en México acuerdo con investigadores de seguridad informática en México es DEC. DES esta identificado como un cifrado Feistel que procesa bloques de texto plano de n = 64 bits, produciendo bloques de texto cifrado de 64 bits.

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Block Ciphers PowerPoint PPT Presentation

Block Ciphers - Block cipher is an encryption function that works on fixed size blocks ... Horst Feistel, who came to U.S. in 1934 from Germany, developed Lucifer cipher ...

Block cipher is an encryption function that works on fixed size blocks ... Horst Feistel, who came to U.S. in 1934 from Germany, developed Lucifer cipher ...

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Random Oracles PowerPoint PPT Presentation

Random Oracles - Luby and Rackoff proved that using Feistel Networks one can construct pseudo ... Proof Methodology [verbatim BR93] ? is a protocol problem ...

Luby and Rackoff proved that using Feistel Networks one can construct pseudo ... Proof Methodology [verbatim BR93] ? is a protocol problem ...

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Block Ciphers and Data Encryption Standards PowerPoint PPT Presentation

Block Ciphers and Data Encryption Standards - Lecture 08 Subject: Network Security

Lecture 08 Subject: Network Security

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William Stallings, Cryptography and Network Security 5/e PowerPoint PPT Presentation

William Stallings, Cryptography and Network Security 5/e - Cryptography and Network Security Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown * Stallings Figure 3.7 illustrates the propagation of ...

Cryptography and Network Security Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown * Stallings Figure 3.7 illustrates the propagation of ...

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Block%20Ciphers%20 PowerPoint PPT Presentation

Block%20Ciphers%20 - Chapter 3 Block Ciphers & The Data Encryption Standard Contents Block Cipher Principles The Data Encryption Standard The Strength of DES Differential and Linear ...

Chapter 3 Block Ciphers & The Data Encryption Standard Contents Block Cipher Principles The Data Encryption Standard The Strength of DES Differential and Linear ...

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William Stallings, Cryptography and Network Security 5/e - Cryptography and Network Security Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown Modified by Richard Newman * A more recent development ...

Cryptography and Network Security Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown Modified by Richard Newman * A more recent development ...

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Fourth Edition by William Stallings PowerPoint PPT Presentation

Fourth Edition by William Stallings - 5 AES Fourth Edition by William Stallings Slides by syang@ustc.edu.cn http://staff.ustc.edu.cn ...

5 AES Fourth Edition by William Stallings Slides by syang@ustc.edu.cn http://staff.ustc.edu.cn ...

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Applied Cryptography (Symmetric) PowerPoint PPT Presentation

Applied Cryptography (Symmetric) - Applied Cryptography (Symmetric) Part I

Applied Cryptography (Symmetric) Part I

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Block%20Ciphers PowerPoint PPT Presentation

Block%20Ciphers - Block ciphers operate by splitting the (binary string representation of the) ... ciphertext (and its statistical properties) is not easily relatable to the key. ...

Block ciphers operate by splitting the (binary string representation of the) ... ciphertext (and its statistical properties) is not easily relatable to the key. ...

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Cryptography and Network Security Chapter 3 PowerPoint PPT Presentation

Cryptography and Network Security Chapter 3 - All the afternoon Mungo had been working on Stern's code, principally with the ... decrypt must unwind steps of data computation ...

All the afternoon Mungo had been working on Stern's code, principally with the ... decrypt must unwind steps of data computation ...

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DES Algorithm PowerPoint PPT Presentation

DES Algorithm - After permutation, the key length will be only 56 bits. 64 ... Besides, we make an Inverse Initial Permutation Table (IP-1), which has effect opposite to IP ...

After permutation, the key length will be only 56 bits. 64 ... Besides, we make an Inverse Initial Permutation Table (IP-1), which has effect opposite to IP ...

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Cryptography and Network Security Chapter 3 - Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown * A desirable property of any encryption algorithm is that a small change in either the ...

Chapter 3 Fifth Edition by William Stallings Lecture s by Lawrie Brown * A desirable property of any encryption algorithm is that a small change in either the ...

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Introduction%20to%20Modern%20Symmetric-key%20Ciphers PowerPoint PPT Presentation

Introduction%20to%20Modern%20Symmetric-key%20Ciphers - Chapter 5 Introduction to Modern Symmetric-key Ciphers 5.*

Chapter 5 Introduction to Modern Symmetric-key Ciphers 5.*

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Practical Aspects of Modern Cryptography PowerPoint PPT Presentation

Practical Aspects of Modern Cryptography - Practical Aspects of Modern Cryptography Josh Benaloh & Brian LaMacchia

Practical Aspects of Modern Cryptography Josh Benaloh & Brian LaMacchia

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FNR - Arbitrary length small domain block cipher proposal PowerPoint PPT Presentation

FNR - Arbitrary length small domain block cipher proposal - FNR denotes Flexible Naor and Reingold. It can cipher small domain data formats like IPv4, Port numbers, MAC Addresses, Credit card numbers, any random short strings while preserving their input length.

FNR denotes Flexible Naor and Reingold. It can cipher small domain data formats like IPv4, Port numbers, MAC Addresses, Credit card numbers, any random short strings while preserving their input length.

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???????? -SEED, AES PowerPoint PPT Presentation

???????? -SEED, AES - -seed, aes seed 1999 2 ( ) ...

-seed, aes seed 1999 2 ( ) ...

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Conventional Encryption Message Confidentiality - Conventional Encryption Message ... 128-bit key Used in PGP Blowfish Easy to implement High execution speed Run in less than 5K of memory Other ...

Conventional Encryption Message ... 128-bit key Used in PGP Blowfish Easy to implement High execution speed Run in less than 5K of memory Other ...

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E-mail: hjbin@infosec.pku.edu.cn PowerPoint PPT Presentation

E-mail: hjbin@infosec.pku.edu.cn - E-mail: hjbin@infosec.pku.edu.cn http://infosec.pku.edu.cn/~hjbin 1949 ...

E-mail: hjbin@infosec.pku.edu.cn http://infosec.pku.edu.cn/~hjbin 1949 ...

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Blowfish Algorithm PowerPoint PPT Presentation

Blowfish Algorithm - Recombine xL and xR. Function F: Divide xL into four eight-bit quarters: a, b, c, and d ... Recombine xL and xR. swap xL and xR. I 16. Yes. No. Encryption ...

Recombine xL and xR. Function F: Divide xL into four eight-bit quarters: a, b, c, and d ... Recombine xL and xR. swap xL and xR. I 16. Yes. No. Encryption ...

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Conventional Encryption Message Confidentiality - Security depends on the secrecy of the key, not the ... Blowfish. Easy to implement. High execution speed. Run in less than 5K of memory. Henric Johnson ...

Security depends on the secrecy of the key, not the ... Blowfish. Easy to implement. High execution speed. Run in less than 5K of memory. Henric Johnson ...

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CS 285 Network Security Block Cipher Principle and Data Encryption Standard DES PowerPoint PPT Presentation

CS 285 Network Security Block Cipher Principle and Data Encryption Standard DES - Data Encryption Standard (DES) From Classical Ciphers to Modern Ciphers ... Product ciphers use the two classical encryption forms: substitution and ...

Data Encryption Standard (DES) From Classical Ciphers to Modern Ciphers ... Product ciphers use the two classical encryption forms: substitution and ...

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Cryptography - Cryptography Lecture 4 Stefan Dziembowski www.dziembowski.net stefan@dziembowski.net Plan History of DES Design of DES 3DES AES On the previous lecture We show how to ...

Cryptography Lecture 4 Stefan Dziembowski www.dziembowski.net stefan@dziembowski.net Plan History of DES Design of DES 3DES AES On the previous lecture We show how to ...

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AES - Lecture 06 Subject: Network Security

Lecture 06 Subject: Network Security

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panaimin@icst.pku.edu.cn PowerPoint PPT Presentation

panaimin@icst.pku.edu.cn - Title: Author: Last modified by: panaimin Created Date: 10/2/1998 5:29:39 AM Document presentation format

Title: Author: Last modified by: panaimin Created Date: 10/2/1998 5:29:39 AM Document presentation format

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Block Ciphers - Intro ... Block Ciphers

Intro ... Block Ciphers

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Beyond-birthday-bound Security Based on Tweakable Block Ciphers PowerPoint PPT Presentation

Beyond-birthday-bound Security Based on Tweakable Block Ciphers - Doubling the Block Length of a Cipher. Build 2n-bit block cipher using n-bit components ... Patarin [Pat04]: 6-round has O(2n)-sec. ( for CCA) ...

Doubling the Block Length of a Cipher. Build 2n-bit block cipher using n-bit components ... Patarin [Pat04]: 6-round has O(2n)-sec. ( for CCA) ...

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Advanced Encryption Standard (AES) PowerPoint PPT Presentation

Advanced Encryption Standard (AES) - Show the value of State after MixColumns. Lab Homework 4 This homework requires two computers with OpenSSH and telnet client and servers installed.

Show the value of State after MixColumns. Lab Homework 4 This homework requires two computers with OpenSSH and telnet client and servers installed.

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Block%20Ciphers:%20Workhorses%20of%20Cryptography PowerPoint PPT Presentation

Block%20Ciphers:%20Workhorses%20of%20Cryptography - Cryptography is the study of mathematical techniques used to provide information ... encompasses both cryptography and cryptanalysis. Cryptographic Primitives ...

Cryptography is the study of mathematical techniques used to provide information ... encompasses both cryptography and cryptanalysis. Cryptographic Primitives ...

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Block Ciphers After the DES PowerPoint PPT Presentation

Block Ciphers After the DES - Block Ciphers After the DES CS 470 Introduction to Applied Cryptography Instructor: Ali Aydin Selcuk After the DES DES was designed for h/w; slow in s/w.

Block Ciphers After the DES CS 470 Introduction to Applied Cryptography Instructor: Ali Aydin Selcuk After the DES DES was designed for h/w; slow in s/w.

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Anahtar Bagimli Bir Sifreleme Algoritmasi (IRON) PowerPoint PPT Presentation

Anahtar Bagimli Bir Sifreleme Algoritmasi (IRON) - Anahtar Ba ml Bir ifreleme Algoritmas (IRON ) Bilg. M h. Necati Demir Yrd. Do . Dr. G khan Dalk l

Anahtar Ba ml Bir ifreleme Algoritmas (IRON ) Bilg. M h. Necati Demir Yrd. Do . Dr. G khan Dalk l

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Outline - Outline Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES)

Outline Overview of Cryptography Classical Symmetric Cipher Modern Symmetric Ciphers (DES)

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COM 5336 Cryptography Lecture 2 Symmetric Cryptography PowerPoint PPT Presentation

COM 5336 Cryptography Lecture 2 Symmetric Cryptography - Title: Cryptography and Network Security 4/e Subject: Lecture Overheads Author: Dr Lawrie Brown Last modified by: Scott Huang Created Date: 3/28/2002 2:06:54 AM

Title: Cryptography and Network Security 4/e Subject: Lecture Overheads Author: Dr Lawrie Brown Last modified by: Scott Huang Created Date: 3/28/2002 2:06:54 AM

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Chap 2-2 Conventional Encryption Message Confidentiality (Symmetric, Block) PowerPoint PPT Presentation

Chap 2-2 Conventional Encryption Message Confidentiality (Symmetric, Block) - Chap 2-2 Conventional Encryption Message Confidentiality (Symmetric, Block) * * 10.P4 S-BOX 0001 ...

Chap 2-2 Conventional Encryption Message Confidentiality (Symmetric, Block) * * 10.P4 S-BOX 0001 ...

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Lecture 23 Symmetric Encryption PowerPoint PPT Presentation

Lecture 23 Symmetric Encryption - Title: Computer Security: Principles and Practice, 1/e Subject: Chapter 21 Lecture Overheads Author: Dr Lawrie Brown Last modified by: Kardelen Created Date

Title: Computer Security: Principles and Practice, 1/e Subject: Chapter 21 Lecture Overheads Author: Dr Lawrie Brown Last modified by: Kardelen Created Date

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Cryptography and Network Security Chapter 3 - Chapter 3 Fourth Edition by William Stallings Lecture s by Lawrie Brown Chapter 3 Block Ciphers and the Data Encryption Standard All the afternoon Mungo had ...

Chapter 3 Fourth Edition by William Stallings Lecture s by Lawrie Brown Chapter 3 Block Ciphers and the Data Encryption Standard All the afternoon Mungo had ...

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William Stallings, Cryptography and Network Security 5/e - Cryptography and Network Security Chapter 5 Fifth Edition by William Stallings Lecture s by Lawrie Brown * Chapter 5 summary. * Lecture s by Lawrie Brown ...

Cryptography and Network Security Chapter 5 Fifth Edition by William Stallings Lecture s by Lawrie Brown * Chapter 5 summary. * Lecture s by Lawrie Brown ...

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CMSC 456 Introduction to Cryptography PowerPoint PPT Presentation

CMSC 456 Introduction to Cryptography - CMSC 456 Introduction to Cryptography Jonathan Katz

CMSC 456 Introduction to Cryptography Jonathan Katz

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Modern Block Ciphers PowerPoint PPT Presentation

Modern Block Ciphers - Shuffle the letters and map each plaintext letter to a different ... E.g., key = MONARCHY. M. O. N. A. R. C. H. Y. B. D. E. F. G. I/J. K. L. P. Q. S. T. U. V. W ...

Shuffle the letters and map each plaintext letter to a different ... E.g., key = MONARCHY. M. O. N. A. R. C. H. Y. B. D. E. F. G. I/J. K. L. P. Q. S. T. U. V. W ...

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ELEC5616 computer and network security PowerPoint PPT Presentation

ELEC5616 computer and network security - ELEC5616 computer and network security matt barrie mattb@ee.usyd.edu.au CNS2010 lecture 4 :: cyphers II *

ELEC5616 computer and network security matt barrie mattb@ee.usyd.edu.au CNS2010 lecture 4 :: cyphers II *

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Block Ciphers - Cut and paste is still possible, but more complex (and will cause garbles) ... CN 1 = E(CN 2 PN 1, K) = MAC. MAC sent along with plaintext ...

Cut and paste is still possible, but more complex (and will cause garbles) ... CN 1 = E(CN 2 PN 1, K) = MAC. MAC sent along with plaintext ...

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Modern Cryptography PowerPoint PPT Presentation

Modern Cryptography - Every time a key is pressed the rotors spin, so the overall ... Provided the intelligence codenamed ULTRA. Important location in the history of computing ...

Every time a key is pressed the rotors spin, so the overall ... Provided the intelligence codenamed ULTRA. Important location in the history of computing ...

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Feistel PowerPoint PPT Presentations