| 摘要 |
<p>A method is provided of generating and distributing secret random data. The method requires a plurality of participating parties (P1, P2,..., PN) each to own an identical private-key generation device (30) and to request an identical random signal (rt) over a shared publication communication network. The internal state of each device is initialised with the same shared secret (st) exchanged securely between the parties. At each iteration of the method, the parties process the public random signal with the internal states (st) of their secret-key generation devices using two functions, the output of the first function being generated secret random data (kt) for use as an encryption key, and the output of the second function being a new internal state for generation of subsequent keys. The functions are preferably non-linear, provably secure cryptographic hash functions.</p> |
