Hashing is a process for message digest. Hash value is the collection of text.
Producing hash values for accessing data or for security. A hash value (or simply hash), also called a message digest, is a number generated from a string of text. The hash is substantially smaller than the text itself, and is generated by a formula in such a way that it is extremely unlikely that some
Hashing is also a common method of accessing data records. Consider, for example, a list of names:
To create an index, called a hash table, for these records, you would apply a formula to each name to produce a unique numeric value. So you might get something like:
Then to search for the record containing Sarah Jones, you just need to reapply the formula, which directly yields the index key to the record. This is much more efficient than searching through all the records till the matching record is found.
