References

HAB91 Haber, S and Stornetta, WS, "How to time-stamp a digital document", Journal of Cryptography, Vol 3 No 2 pp 99-111, 1991.

TSA For example see the services offered by Entrust. The IETF Public Key Infrastructure security area project (PKIX) has defined a Time Stamping Protocol (TSP) which defines how time stamping agencies (TSAs) will operate in the future. See also the 'stamper' service operated by IT Consultancy Ltd.

UKIPO The UK Intellectual Property Office (formerly the Patent Office) provides a core, authoritive resource for the nature and types of IPR and what procedures they operate for their formal registration.

CODEL Codel Ltd operate a commercial registration service in the UK.

SURETY Surety Inc operate a commercial registration system in the US.

NIST The US cryptographic standards are developed at the National Institute for Standards and Technology (NIST).

EPRINTS Academic publishing is becoming aware of the need for registering pre-prints and follow-up versions of papers. For example see the Eprints project.

PKIX The Public Key Infrastructure working group is a member of the The Internet Engineering Task Force (IETF) collective run by the Internet Society. This is the place to look for the RFC series of standards documents covering hashing algorithms.