Encryption Fundamentals
Terms
One-Way Encryption
- Bob encrypts cleartext for Alice using her public key
- Afterwards Bob cannot decrypt the ciphertext
Two-Way Encryption
- Bob encrypts cleartext for Alice
- They can both decrypt the ciphertext
- Uses a shared symmetric key
Symmetric Encryption
- A two-way encryption key
- Very fast to use
Asymmetric Encryption
Slow encryption, with two parts:
- Public Key - used for one way encryption.
- Private Key - used for one way decryption.
DH — Diffie Hellman
- 1976 method of exchanging secret symmetric keys using asymmetric keys