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Tryout

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by

David Zwart

on 17 February 2012

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Transcript of Tryout

RSA The cryptographic system of the 21th century Muhabbat Komil David Zwart Modern
Symmetric Asymmetric Public Key Cryptography RSA Diffie-Hellman Cryptography > computers History Modern cryptography Comparison of two cryptosystems Programming cryptography Comparison of two cryptosystems Speed

Hacking speed

Entropy

Integrity End of presentation Any questions? Iterations Transpositions 1,3,4,5,2 "Hello" "Hlloe" DES Data Encryption Standard Fast Middleperson attack Slow Future threats Diffie-Hellman RSA Public Key Private Key "Message" "Code" "Message" Outdated One key: symmetric cryptography First symmetric cryptosystem Slow Future threat(no problem yet) Created by Rivest, Shamir and Adleman Key Key "Message" "Code" "Message" Two keys: assymmetric cryptography Vocabulary Public Key Private Key "Message" "Code" "Message" encryption decryption Encryption Cryptography Cryptology Cryptanalysis Decryption Plaintext Ciphertext Public key Private key Variable speed. Created by Diffie and Hellman Intended for sharing keys. key exchange Message --> split --> numbers "Hello" He-ll-o 14-24-15 Classic The Codes of the Wars Medieval Hieroglyphs History Vigenère cipher key: LEW "and" "lrz" Trench codes
ADFG(V)X-cipher
The Tableau de Concordance
Trithemius cipher
Morse Code

Steganography
Caesar cipher
Programming RSA No identification Mathematical overflow No standard
encryption Hacking Brute Force Attack Breaking order: Public Key
Private Key numbers
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