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Cryptography – Symmetric Encryption Basics

A stub for the first deep-dive into symmetric encryption in , focusing on block ciphers, modes of operation, and basic threat models.

1 min read By Scott Weeden cryptographysymmetric-encryptionblock-ciphers

Cryptography – Symmetric Encryption Basics

[Stub] Outline of core ideas: secret-key encryption, ideal cipher model, and how block ciphers are used in practice.

Topics

  • Symmetric vs. asymmetric cryptography
  • Block ciphers and stream ciphers at a high level
  • Modes of operation (ECB vs. CBC vs. CTR – conceptual overview)
  • Threat models and basic security notions (e.g., ciphertext-only, known-plaintext)

Reading and Preparation

[Stub] Link to the corresponding Canvas module and textbook chapter on symmetric encryption.