caesar cipher

Sep 19, 2019

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caesar cipher

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Cubic cipher

Cubic cipher. key generation. First, form a Keystring like Playfair E.g. Keyword=COLUMBIA Keystring=COLUMBIADEFGHJKNPQRSTVWXYZ. key generation. Then wrap keystring around a 3X3X3 cube, but leave center empty. 2D and 3D views: z=0 z=1 z=2 COL EFG QRS UMB H J TVW IAD KNP XYZ.

620 views • 25 slides

Playfair Cipher

Playfair Cipher. Group 04: Yiyang Zhongyang Tan Xiao. Introduction. simple transposition offering a relatively waek method of encryption used by many countries during wartime

731 views • 19 slides

Caesar

Caesar . After Gaul. Clodius and Pompeia. Entered Pompeia’s house during secrete rights of the Good Goddess Only women were allowed He was found out and created a scandal Caesar divorces his wife Promotes Clodius to consul so that he could control him. The First Triumvirate.

326 views • 0 slides

Monoalphabetic Cipher

Monoalphabetic Cipher. Rather than just shifting the alphabet Could shuffle (jumble) the letters arbitrarily Each plaintext letter maps to a different random cipher text letter hence key is 26 letters long Plain: abcdefghijklmnopqrstuvwxyz Cipher: DKVQFIBJWPESCXHTMYAUOLRGZN

2k views • 11 slides

Vigenére Cipher

Vigenére Cipher. Kimberly Chiffens & Maria Jannelli. What is it?. Cryptology is the science of securing information Frenchman Blaise de Vigenere created this cipher based on the polyalphabetic substitution based cipher This particular cipher involves a multiple shift method

361 views • 6 slides

Stream Cipher

Stream Cipher. Introduction Pseudorandomness LFSR Design Refer to “Handbook of Applied Cryptography” [Ch 5 & 6]. Stream Cipher. Introduction Originate from one-time pad bit-by-bit Exor with pt and key stream ( c i = m i  z i )

665 views • 33 slides

Cipher Office

The Battle Box is the underground command centre constructed under Fort Canning, Singapore as an emergency, bomb-proof command centre of the British HQ Malaya Command during World War 2. .

356 views • 8 slides

CIPHER Vision

The Collaborative Initiative for Paediatric HIV Education and Research (CIPHER) Linda-Gail Bekker. The implementation of this project was made possible through an unrestricted grant from ViiV Healthcare.

254 views • 10 slides

Vigenére Cipher

Vigenére Cipher. Kimberly Chiffens & Maria Jannelli. Progress Report. Implementation of Vigenere encryption and decryption Applet design Implementation of Friedman attack to find key length Apply cryptanalysis algorithms. Friedman Attack Key Length.

408 views • 12 slides

Vigenère Cipher

Vigenère Cipher. Like Cæsar cipher, but use a phrase Example Message THE BOY HAS THE BALL Key VIG Encipher using Cæsar cipher for each letter: key VIGVIGVIGVIGVIGV plain THEBOYHASTHEBALL cipher OPKWWECIYOPKWIRG. G I V A G I V B H J W E L M Z

2.43k views • 51 slides

Block Cipher

Block of Bits. KEY. Block of Bits. Block Cipher. Today’s most widely used ciphers are in the class of Block Ciphers Define a block of computer bits which represent several characters Encipher the complete block at one time. Algorithm. Modes of Operation.

575 views • 24 slides

Vigenére Cipher

Vigenére Cipher. Kimberly Chiffens & Maria Jannelli. Progress Report. Implementation of Vigenere encryption and decryption Applet design Website design Implementation of Friedman attack which one way to find the key length in cryptanalysis. Future Plans.

321 views • 13 slides

Stream Cipher

682 views • 33 slides

Stream Cipher

Stream Cipher. Topics. One-Time-Pad Random Number Generator Stream Cipher RC4 RC4 and WEP. One-Time Pad. Developed by Gilbert Vernam in 1918, another name: Vernam Cipher The key a truly random sequence of 0 ’ s and 1 ’ s the same length as the message use one time only

610 views • 30 slides

Stream Cipher

Stream Cipher. July 2011. Topics. One-Time-Pad Random Number Generator Stream Cipher RC4 RC4 and WEP. One-Time Pad. Developed by Gilbert Vernam in 1918, another name: Vernam Cipher The key a truly random sequence of 0’s and 1’s the same length as the message use one time only

567 views • 32 slides

Hybrid Cipher

Hybrid Cipher. Key. IV. Key. Hybrid Cipher. Plain. Cipher. Hybrid Cipher. Plain. Text. Text. Text. decryption. encryption. Note : IV used in encryption is not used in decryption. Features. Initialization Vector (IV) necessary only in Encryption Hash Integration

395 views • 7 slides

Caesar

By:Susette Corcino and Keniah McCutchen. Caesar. Caesar was one of the emperors in Rome in 59 B.C. Julius Caesar was murdered because he became too powerful in 44 B.C Gaius Caesar was murdered in 41 AD. Julius Caesar was the most famous of all Romans.(100 BC-44 BC).

381 views • 1 slides

古典密碼： Caesar Cipher

古典密碼： Caesar Cipher. 中興資科詹進科 (jkjan@cs.nchu.edu.tw) 中興資管陳育毅 (chenyuyi@nchu.edu.tw ). Caesar Cipher 課程模組大綱. 對稱式加密 ( Symmetric Encryption ) 凱撒加密法 ( Caesar Cipher) 凱撒加密法 ( Caesar Cipher ) - 以數字表示凱撒加密法 ( Caesar Cipher ) – 加解密公式凱撒加密的破解 – 暴力破解法. 對稱式加密 ( Symmetric Encryption ).

285 views • 9 slides

Hill Cipher

Hill Cipher. Hill Cipher. Takes two or three or more letter combinations to the same size combinations, e.g. “the”  “rqv” Uses simple linear equations An example of a “block” cipher encrypting a block of text at a time Numbered alphabet: a = 0, b = 1, c = 3, etc. (in CAP, use ASCII code).

430 views • 6 slides

Stream Cipher

565 views • 33 slides

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