
<< Back 
cryptographic hash

A mathematical function that maps values from a large (or even very large) domain into a smaller range, and is (a) oneway in that it is computationally infeasible to find any input which maps to any prespecified output; and (b) collisionfree in that it is computationally infeasible to find any two distinct inputs which map to the same output. [After X9.31] 

