CMSC456

This course covers the theory behind modern cryptography. The goal of this field is to secure information. To do this, we want to uphold:

• Data Privacy: Ensure that adversaries cannot see or obtain the message.
• Data Integrity / Authentication: The message origin can be verified (authenticity), and the message has not been modified in transit (integrity).

Common symbols / terminology:

• $M$: The message we want to keep secure
• $K$: A key we use to encrypt and/or decrypt the message
• $C$: The encrypted message; ciphertext.

Notes are below.

• Symmetric Key Encryption
• Public Key Encryption
• Lattice Based Cryptography