Bouncy castle java - Triple DES cryptography is symetric or asymmetric?

Bouncy castle java - Tripl开发者_运维技巧e DES cryptography is symemtric or asymmetric?

I am using bouncy castle Java API for implementing tripleDES, but I do not know if it is symmetric or asymmetric key cryptography.

Can somebody help me to answer this question.

Triple DES is an symmetric block cipher, a rather old one. I would stick to stronger algorithms (e.g. AES) if I had the choice.