Tag
key-derivation
- Sep 11, 2026 Password-Based Key Derivation and What Iteration Counts Buy How salts, memory hardness, and iteration counts change the cost of guessing a password-derived key, and where each parameter stops helping. cryptography
- Aug 20, 2026 Ephemeral Diffie-Hellman and What Forward Secrecy Actually Buys Why a fresh exponent per handshake protects past sessions after a key compromise, what the extra exponentiations cost, and how identity binding prevents the exchange from being hijacked. cryptography
- May 16, 2026 The TLS 1.3 Key Schedule: Extract, Expand, and Why Order Matters How HKDF turns one shared secret into six traffic secrets, what the transcript hash does at each stage, and why early secrets are derived before the peer is authenticated. internet protocols
- Oct 22, 2025 Page-Level Encryption: Nonces, MACs, and the Cost of Decrypting Every Read How an embedded database encrypts individual pages with a per-page nonce and a per-page MAC, what that costs in usable page space, and why the key cache is the real attack surface. mobile computing
- Oct 13, 2025 Hybrid Encryption and the Cost of Encrypting Long Messages Why a public-key operation wraps a symmetric key instead of the message, how RSA-KEM and ECIES derive that key, and what the encapsulation interface changes. cryptography
- Apr 29, 2025 Domain Separation and Labelled Key Derivation Why one master secret must never produce two interchangeable keys, how labels are encoded into a KDF, and which label collisions still cause cross-protocol failures. cryptography
- Aug 29, 2024 SRTP Key Derivation and Per-Packet IV Construction How one master key produces separate encryption, authentication, and salting keys, and why the packet index rather than the sequence number feeds the counter block. internet protocols
- Dec 23, 2022 Salted Password Hashing and the Cost of a Verification How salts, iteration counts, and memory hardness set the price of an offline guess, and why the stored record must carry its own parameters. security