Mutual mistrust can now be enshrined in software. Time-release cryptography allows cautious companies to release secrets to each other in stages as contracts are signed, says Hewlett-Packard (GB 2372414). The system also makes electronic diaries readable only after a fixed time has elapsed, seals secret auction bids and releases staged payments. The decryption codes work only at given dates and times on computers with synchronised clocks.
Technology
You show me yours…
By Barry Fox
10 November 2008
