Deltacrypt OneClick Public Key File Encryption features RSA protection in its public keys, protects encryption and public key integrity with hashing functions, and digital signatures. It lets the user create and distribute unalterable public keys. This impossibility to alter Deltacrypt public key files prevents man-in-the-middle attacks where key interception and substitution is at the heart of such attack. It is brute-force attack resistant by simulating decryption process in real decryption time when used with a false private key. It encrypts binary units of information, therefore it can cipher any file formats with its 768-character key and has no encryption volume limitation.