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A command line tool for encrypting and decrypting files using any file as a key
===== What it's all about
To generate a strong 32-byte key from a user-provided file,
Bytebox uses the scrypt key derivation function.
===== WHY IT'S SO SLOW?
Key derivation functions like scrypt, PBKDF2, and bcrypt are specifically designed to make brute-force attacks more difficult. They do this by introducing a work factor (also known as iteration count or cost factor) which slows down the process of deriving a key from a password.
===== LINKS
For the actual encryption and decryption, we rely on the AES.
https://en.wikipedia.org/wiki/Advanced_Encryption_Standard
https://en.wikipedia.org/wiki/Galois/Counter_Mode
https://godoc.org/golang.org/x/crypto/scrypt