PGP encryption

PGP encryption has a rather steep learning curve, but its AES-256 encryption has not been publicly known to be crackable by adversaries with seemingly infinite resources at their disposal, such as the NSA. Take some time to practice using PGP, and use it to encrypt all communications with sensitive information. In any case, the use of strong encryption impedes the enemy’s efforts at datamining and subverting us.

https://theprivacyguide.org/tutorials/pgp.html