Victor Duchovni wrote:
On Tue, Feb 14, 2006 at 02:50:19PM -0800, Bob Mearns wrote:
Sorry - more details: This isn't a comm aplication - it amounts to
authentication of application data files. The signer is an utility which
exists solely in a vendor's environment. The verifier is an application
that exists in a consumer (potentially hostile) environment. Hence
asymmetric key algorithms are a fit.
If you want small, publically verifiable signatures for stored data, your
only choice is ECC.
in case of ECDSA the signature size is approx. twice the field size.
The smallest curve openssl afaik support is a 112 bit binary curve,
hence still too big.
Cheers,
Nils
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