Authorization: Permission to access a resource.

Confidentiality: The property of data not being divulged to unauthorized parties.

DES: Data Encryption Standard, a secret key cryptographic scheme.

Integrity: The system protects the data from unauthorized modification.

Public Key Cryptography: Also known as asymmetric cryptography, a cryptographic system where encryption and decryption are performed using different keys, one of which can be made public.

RFC: Internet request for comments is the Internet communities method of standardizing technology for the Internet.

Symmetric Key Crytography: The same key is used for encryption.