The best encryption is AES-256. It’s a symmetric encryption algorithm that is considered to be unbreakable by today's standards. It’s used by governments, militaries, and high-quality VPN providers like ExpressVPN to protect sensitive data. AES-256 uses a 256-bit key, which means that there are 2^256 or 1.1 x 10^77 possible combinations. This is a truly astronomical number, and it would take even the most powerful computers billions of years to crack AES-256 encryption.