Cryptographic Protocol & Analysis

Cryptographic Protocol & Analysis

1. Key-based algo

   • Types
     • Public-key / asymmetric
       • Ek & Dk different
     • Secret-key/Symmetric
       • encryption key can be calculated from decryption key and vice versa.
       • types of security key
         • Stream algo
         • Block algo
       • Ek & Dk same

2. Cryptanalitic attacks

   • Types
     • Ciphertext-only attack
     • Known-plaintext attack
     • Chosen-plaintext attack
     • Adaptive chosen plaintext attack

3. ctegories of breaking an algo

   • Types
     • Total break
     • Global Deduction
     • Instance
     • Information deduction