<string> crypt.encrypt(<string> data, <string> key)  
<string> crypt.decrypt(<string> data, <string> key)  
<string> crypt.base64.encode(<string> data)  
- Encodes 
data with base64. 
<string> crypt.base64.decode(<string> data)  
- Decodes 
data with base64. 
<string> crypt.hash(<string> data)
- Hashes 
data with SHA-384. 
<string> crypt.derive(<string> value, <uint> length)
- Derives a secret key from 
value with the length of length. 
<string> crypt.random(<uint> size)
- Generates a random string with 
size (cannot be negative or exceed 1024).