Hi, basically I receive a string generated by a user, then “encode” it
using some secret string I own and pass the result to other user, and
when I receive such a resulting string I must be able to decode it
using my secret string (but no other should be able to decode the
resulting string without knowing my secret key. This is:
original_string = “test”
secret_key = “ABCD”
modified_string = HASH_FUNCTION(original_string, secret_key)
original_string = UNHASH_FUNCTION(modified_string, secret_key)
Any suggestion for the above HASH_FUNCTION and UNHASH_FUNCTION? I
would like it to be something really efficient.
Thanks a lot.