Classical ciphers - PowerPoint PPT Presentation

Classical Encryption Techniques

Classical Encryption Techniques. As opposed to modern cryptography Symmetric-key. Symmetric Cipher Model. Brute-Force Attack. Try every key to decipher the ciphertext. On average, need to try half of all possible keys Time needed proportional to size of key space. Classical Ciphers .

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CIS 5371 Cryptography

CIS 5371 Cryptography. Introduction B ased on: Jonathan Katz &amp; Yehuda Lindel Introduction to Modern Cryptography. Prerequisites for this course. Basic Mathematics, in particular Number Theory Basic Probability Theory Problem solving skills Programming skills (for projects).

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Course summary

Course summary. COS 433: Crptography -Spring 2010 Boaz Barak. This course was hard…. …and it was (partly) my fault. Goals for this course. Balanced coverage of crypto: “ appetizers, main course, and desserts ” Develop “ crypto-intuition ”..

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