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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Diffie–Hellman key agreement
Parties derive a shared secret through group exponentiation; authentication is needed against interception.
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Groups
A group has an associative operation, an identity and an inverse for every element.
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.
Knowledge connections
- RSA · Related · Map context
- Symmetric encryption · Related · Map context
- Groups · Prerequisite · Map context