# Cryptography A tiny C# library for encrypting and decrypting data using both symmetric (AES) and asymmetric (RSA) algorithms.

Symmetric (AES)

Symmetric encryption is best suited for small amounts of data.

// Set the passphrase.
const string passphrase = "This is a passphrase";

// Encrypt.
var encrypted = Cryptography.AES.Encrypt(
    "This is some text to encrypt",
    passphrase);

// Decrypt.
var decrypted = Cryptography.AES.Decrypt(
    encrypted,
    passphrase);

Asymmetric (RSA)

Asymmetric encryption is best suited for large amounts of data. With public/private key encryption you can also switch the keys if you wanted, encrypting with the private key and decrypting with the public key.

// Generate keys.
Cryptography.RSA.GenerateKeys(
    out var privateKey,
    out var publicKey,
    keySize: 2048); // The keySize is optional and defaults to 2048.

var encrypted = Cryptography.RSA.Encrypt(
    "... this is a large dataset ...",
    publicKey);

var decrypted = Cryptography.RSA.Decrypt(
    encrypted,
    privateKey);