'Monoalphabetic substitution cipher' presentation slideshows

Introduction to Information Security Lecture 2: Quick Overview on Information Security

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Chapter 8: Scrambling Through Cryptography

Chapter 8: Scrambling Through Cryptography. Security+ Guide to Network Security Fundamentals Second Edition. Objectives. Define cryptography Secure with cryptography hashing algorithms Protect with symmetric encryption algorithms Harden with asymmetric encryption algorithms

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Cryptography & Cryptanalysis

561 views • 41 slides

Secret-Key Encryption

Secret-Key Encryption. Introduction. Encryption is the process of encoding a message in such a way that only authorized parties can read the content of the original message History of encryption dates back to 1900 BC Two types of encryption

385 views • 38 slides

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.

738 views • 34 slides