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SHS type 3 test



Hi

This is a question about the Encryption algorithms used in the IPSec.

Under the secure hash standard testing :  FIPS PUB 180-1, descibes three 
areas of the Secure hash standard : message of verying length, selected 
long messages and psuedo randomly generated messages.

The first two type of tests ( Messages of verying length and selected long 
messages) are easy to cover  and i think it ocvers most of the algorithm. 
Then what is the significance of the SHS type3 test which more time 
consuming. Does it cover any kind of cases which are not covered by other 
type of tests?

Can somebody throw soem light on this?

-thanks in advancs
-ramana