HuntVPN uses the Advanced Encryption Algorithm (AES), also known as Rijndael, with a minimum key length of 256-bits. This is the highest form of encryption currently available and is used worldwide for military and government applications.

Advanced Encryption Standard on WikiPedia:
https://en.wikipedia.org/wiki/Advanced_Encryption_Standard

Cryptography/AES on WikiBooks:
https://en.wikibooks.org/wiki/Cryptography/AES