CrococryptMirror is described as 'Crococrypt is an encryption tool which mirrors complete folders to encrypted folders. The encryption algorithms that are used are AES and Twofish (256 bits, cascading). The keyfile is secured by a password using PKCS #5 (PBKDF2) with a SHA512/Whirlpool based HMAC using 100000' and is an app in the backup & sync category. There are more than 10 alternatives to CrococryptMirror for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best CrococryptMirror alternative is FileCryptor. It's not free, so if you're looking for a free alternative, you could try Age or Kryptor. Other great apps like CrococryptMirror are Encrypto, Cryptsync, Boxcryptor and S.S.E. File Encryptor.