De or het data-encryptie?

The correct Dutch article is:

de data-encryptie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use data-encryptie

the data-encryptiede data-encryptie
this data-encryptiedeze data-encryptie
that data-encryptiedie data-encryptie
our data-encryptieonze data-encryptie
your data-encryptiejouw data-encryptie
every data-encryptieelke data-encryptie
which data-encryptie?welke data-encryptie?
a big data-encryptie / the big data-encryptieeen grote data-encryptie, de grote data-encryptie