This is a small, fixed length value generated by a function that has the property that different values for the data result in different hash values. The hash is encrypted using a private key to create the digital signature.
A one-way algorithm which maps or translates one set of bits into another (generally smaller) in such a way that the algorithm yields the same hash results every time for the same message, and it is computationally infeasible for a message to be reconstituted from the hash result. Also, two different messages cannot produce the same hash results.
A single numerical value that is calculated from a specified set of data using a hashing algorithm. Cache Array Routing Protocol (CARP) uses the hash values calculated from a requested URL and the names of the ISA Server computers in an array, to determine the specific ISA Server computer to which a client request is routed.