rsa - Time to verify a signature on a long message -

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i'm studying speed (time verify) signed message rsa or dsa on different processors

in link, there benchmarks the time verify signature on short message (59 bytes) http://bench.cr.yp.to/results-sign.html

but i need times verify signature on long message (1500) byte , there relation between time verify signature on message , message length ?

there 2 parts verification:

  1. hashing message, ,
  2. performing public key operation , comparison on supplied signature , hash

1) takes longer longer messages, whereas 2) depend on size of public key. also, 2) dominate 1) except long messages.

when benchmarking verification times interested in #2, might use short message benchmark cited does. can benchmark hashing times separately if you're interested in that.


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