Re: DiffieHellman key exchange
 From: Bryan <bryanjugglercryptographer@xxxxxxxxx>
 Date: Mon, 10 May 2010 11:35:58 0700 (PDT)
stevenvh asked:
let the oneway function be (a ^ b) mod m. What are typical ranges for
a, b and m? I guess a can be small ( 10^1 ?) since (a ^ b) becomes
rather large very quickly.
Yes, the base can be small, as long as it generates a large subgroup
of the multiplicative group mod m. RFC 3526 specifies some groups for
DiffieHellman key exchange that use 2 as the base.
You can find more guidance on sizes in:
http://csrc.nist.gov/publications/nistpubs/80057/sp80057Part1revised2_Mar082007.pdf

Bryan
.
 References:
 DiffieHellman key exchange
 From: stevenvh
 DiffieHellman key exchange
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