data encryption vs encoding

data encryption and encoding both are nouns.

Word	Noun	Adjective	Verb	Adverb
data encryption	Yes	No	No	No
encoding	Yes	No	No	No

As nouns, encoding is a hypernym of data encryption; that is, encoding is a word with a broader meaning than data encryption:

data encryption: (computer science) the encryption of data for security purposes
encoding: the activity of converting data or information into code

Other hypernyms of data encryption include encryption.

data encryption (noun)	encoding (noun)
(computer science) the encryption of data for security purposes	the activity of converting data or information into code