Cryptography
Explore arithmetic and security models; encryption and authentication; groups, signatures and hashes. Concepts and connections are available independently of video coverage.
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Public-key encryption
Public encryption keys and private decryption keys have different roles.
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RSA
RSA uses modular exponentiation with related exponents; secure encryption requires appropriate padding and parameters.
Symmetric encryption
A shared secret key supports encryption and decryption under a specified scheme.
Chinese remainder theorem
Pairwise coprime moduli give a unique combined congruence class modulo their product.
Cryptographic hashes
Cryptographic hashes aim at preimage and collision resistance; hashing alone is not encryption.
Cryptographic security models
Security depends on defined adversary capabilities, assumptions and failure probability.
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- Symmetric encryption · Related · Map context
- RSA · Related · Map context
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