# Crypt user defined functions Reference

Below is a complete list of the user defined functions available in AutoIt. Click on a user defined function name for a detailed description.

When using them you need to add a #include <Crypt.au3>.

User Defined Function | Description
--- | ---
_Crypt_DecryptData | Decrypts data using the supplied key
_Crypt_DecryptFile | Decrypts a file with specified key and algorithm
_Crypt_DeriveKey | Creates a key from algorithm and password
_Crypt_DestroyKey | Frees the resources used by a key
_Crypt_EncryptData | Encrypts data using the supplied key
_Crypt_EncryptFile | Encrypts a file with specified key and algorithm
_Crypt_GenRandom | Fill a buffer with cryptographically random data
_Crypt_HashData | Hash data with specified algorithm
_Crypt_HashFile | Hash the contents of a file using a specified algorithm
_Crypt_Shutdown | Uninitialize the Crypt library
_Crypt_Startup | Initialize the Crypt library