On 01/03/2013 10:25 PM, ianG wrote:
Hence my earlier question - has anyone allocated the OpenPGP numbers for
Keccak as yet? The reason I asked is because I stumbled on the code
last week and thought what a fine idea it would be to at least prepare
the way.... Strawman?
SHA3-224 4 12
SHA3-256 5 13
SHA3-384 6 14
SHA3-512 7 15
Strawman? I'm not sure why there is a gap 4-7 in rfc4880. Are there
any spots already allocated?
One point I wanted bring up here based on the draft that I wrote last
year is that let's think for a moment about the usefulness of the SHA3-224.
I would like to see an argument for it. Algorithms like DSA/ECDSA are
capable to deal with hash truncation or padding. RSA mod has sufficient
space to always use SHA3-512.
The question is especially relevant if you familiarize yourself with the
Keccak. Keccak is basically a single hash algorithm which output is
truncated to 256, 384, 512, etc bits. The only difference between
SHA3-256 and SHA3-512, for example, is one integer used in the internal
You can always go with stronger security. Who are those people who would
not be OK with SHA3-256 but are happy with SHA3-224 ? Why can't they use
shorter public keys (to solve space concerns?) ?
openpgp mailing list