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The first widely marketed software package to offer digital signature was Lotus Notes 1.0, released in 1989, which used the RSA algorithm. [26] Other digital signature schemes were soon developed after RSA, the earliest being Lamport signatures, [27] Merkle signatures (also known as "Merkle trees" or simply "Hash trees"), [28] and Rabin ...
Trusted as a regular hand-written signature, the digital signature must be made with a private key known only to the person authorized to make the signature. Tokens that allow secure on-board generation and storage of private keys enable secure digital signatures, and can also be used for user authentication, as the private key also serves as a ...
A superset of the IETF's RFC 3161 protocol, the X9.95 standard includes definitions for specific data objects, message protocols, and trusted timestamp methods, such as digital signature, MAC, linked token, linked-and-signature and transient-key methods.
An X.509 certificate binds an identity to a public key using a digital signature. A certificate contains an identity (a hostname, or an organization, or an individual) and a public key ( RSA , DSA , ECDSA , ed25519 , etc.), and is either signed by a certificate authority or is self-signed.
Credentials, tokens, and authentication protocols can also be combined to identify that a claimant is in fact the claimed subscriber. An assertion mechanism that involves either a digital signature of the claimant or is acquired directly by a trusted third party through a secure authentication protocol.
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.
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