Hash-based cryptography | Digital signature schemes

Lamport signature

In cryptography, a Lamport signature or Lamport one-time signature scheme is a method for constructing a digital signature. Lamport signatures can be built from any cryptographically secure one-way function; usually a cryptographic hash function is used. Although the potential development of quantum computers threatens the security of many common forms of cryptography such as RSA, it is believed that Lamport signatures with large hash functions would still be secure in that event. Each Lamport key can be used to sign a single message. Combined with hash trees, a single key could be used for many messages, making this a fairly efficient digital signature scheme. The Lamport signature cryptosystem was invented in 1979 and named after its inventor, Leslie Lamport. (Wikipedia).

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One-way function | RSA Security | Security level | Blum Blum Shub | Accumulator (cryptography) | Digital signature | Hash list | Cryptographic hash function | Grover's algorithm | Mathematical notation | Merkle tree | Cryptographically secure pseudorandom number generator | Cryptography