hello,

On Sunday 15 January 2006 22:38, dongdong chen wrote:
> Hi All,
>
> Does gnu crypto provide the trap door hash?

all hash functions implemented in GNU Crypto are trapdoor functions; 
i.e. one-way functions.  they are called like that because given a hash 
and the algorithm that produced it, one can not re-construct the 
original message.


cheers;
rsn

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