A generic cryptography model is shown in the following diagram:
A model of the generic encryption and decryption model
In the preceding diagram, P, E, C, and D represent plaintext, encryption, ciphertext, and decryption, respectively. Also based on this model, explanations of concepts such as entity, sender, receiver, adversary, key, and channel follow:
- Entity: Either a person or system that sends, receives, or performs operations on data
- Sender: This is an entity that transmits the data
- Receiver: This is an entity that takes delivery of the data
- Adversary: This is an entity that tries to circumvent the security service
- Key
