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Difference between revisions of "signed timestamp"
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A '''signed timestamp''' is a [[digital signature|digitally signed]] certificate proving the existence of a certain document at a given time. | A '''signed timestamp''' is a [[digital signature|digitally signed]] certificate proving the existence of a certain document at a given time. | ||
| − | The [[hash function|unique hash]] of the document data or the document itself is sent to a trusted third party (timestamping authority) that | + | The [[hash function|unique hash]] of the document data or the document itself is sent to a trusted third party (timestamping authority) that adds the timestamp and signs it with its [[public key cryptography|private key]]. The authenticity of the timestamp is ensured by the digital signature. |
Signed timestamps can be used to prove authorship and to protect original ideas from abusive [[patent]]ing. | Signed timestamps can be used to prove authorship and to protect original ideas from abusive [[patent]]ing. | ||
Latest revision as of 04:20, 21 January 2007
A signed timestamp is a digitally signed certificate proving the existence of a certain document at a given time.
The unique hash of the document data or the document itself is sent to a trusted third party (timestamping authority) that adds the timestamp and signs it with its private key. The authenticity of the timestamp is ensured by the digital signature.
Signed timestamps can be used to prove authorship and to protect original ideas from abusive patenting.
See also: timestamp, digital signature.
External links[edit]
- RFC 3161 Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP)
- Free timestamp service (UK based)
- Free timestamp service (Netherlands based)
- RSA Laboratories - What is digital timestamping?
- How to Time-stamp a Digital Document (1991) Stuart Haber, W. Scott Stornetta, Lecture Notes in Computer Science
