Time stamp protocol
Encyclopedia
The Time-Stamp Protocol, or TSP is a cryptographic protocol for certifying timestamp
s using X.509
certificates and public key infrastructure
. The timestamp is the signer's assertion that a piece of electronic data existed at or before a particular time.
Trusted timestamping
Trusted timestamping is the process of securelykeeping track of the creation and modification time of a document. Securityhere means that no one — not even the owner of the document — should be able to change it once it has been recorded provided that the timestamper's integrity is never...
s using X.509
X.509
In cryptography, X.509 is an ITU-T standard for a public key infrastructure and Privilege Management Infrastructure . X.509 specifies, amongst other things, standard formats for public key certificates, certificate revocation lists, attribute certificates, and a certification path validation...
certificates and public key infrastructure
Public key infrastructure
Public Key Infrastructure is a set of hardware, software, people, policies, and procedures needed to create, manage, distribute, use, store, and revoke digital certificates. In cryptography, a PKI is an arrangement that binds public keys with respective user identities by means of a certificate...
. The timestamp is the signer's assertion that a piece of electronic data existed at or before a particular time.
External links
- IETF RFC 3161, official specification
- OpenTSA is an open-source project to add time stamping functionalities to OpenSSLOpenSSLOpenSSL is an open source implementation of the SSL and TLS protocols. The core library implements the basic cryptographic functions and provides various utility functions...
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