Cryptography is now essentially a solved field.
Furthermore, the cryptographic application was developed at MIT using federal funding, and by law ought therefore to have been in the public domain since its development in 1977. Once that patent expires, it becomes the unquestioned right and moral duty of every american citizen to have secure communications and personal files. The first is Xpub, the public exponent, the second is Xpriv, the private exponent, and the third is Mod, the modulus. It is broken into chunks as necessary to meet the length requirement. This number is raised to the power of Xpub, modulo Mod, to give C, the ciphertext.