What is meant by the term hash encryption?

Answer 1

From www.ffiec.gov: Three types of encryption exist: the cryptographic hash, symmetric encryption, and asymmetric encryption.
A cryptographic hash reduces a variable-length input to a fixed-length output.
Symmetric encryption is the use of the same key and algorithm by the creator and reader of a file or message.
Asymmetric encryption lessens the risk of key exposure by using two mathematically related keys, the private key and the public key.
Got that?
;-D

Answer 2

One-way Hash Encryption

"One-way hash encryption" also known as a message digest, digital signature, one-way encryption, digital fingerprint, or cryptographic hash. It is referred to as "one-way" because although you can calculate a message digest, given some data, you can't figure out what data produced a given message digest.

This is also a collision-free mechanism that guarantees that no two different values will produce the same digest. Another property of this digest is that it is a condensed representation of a message or a data file and as such it has a fixed length.

There are several message-digest algorithms used widely today.