Key Management and Cryptography Concepts

These flashcards cover key terms and concepts related to key management and cryptography, facilitating study and review.

Key Management Challenges

Include key distribution, generation, and handling to ensure security of secret keys.

Kerckhoffs’s Principle

States that the security of a cryptosystem should depend only on the secrecy of the key, not the algorithm.

Cryptoperiod

The defined lifetime during which a key is considered safe to use.

Rekeying

The process of replacing an old key with a new one to enhance security.

Cryptonet

A group of people or devices that share the same secret key.

Public-Key Cryptography

A technique to share secret information without sharing a secret ahead of time.

Diffie-Hellman Protocol

A method to construct a shared secret from public information.

RSA Encryption

A public-key encryption method that uses large integers for data encryption.

Entropy in Key Strength

The amount of randomness in a key; higher entropy makes keys harder to attack.

XOR Operation

A binary operation used in cipher algorithms to combine two data streams.

Encryption Algorithm

A method for converting plaintext into ciphertext using a key.

Passphrase

A longer, often more secure alternative to a password used in cryptography.

Digital Signatures

A cryptographic method used to validate the authenticity and integrity of a message.

Certificate Authority

An entity that issues digital certificates and verifies the identity of the certificate holder.

Quantum Key Distribution

A method of distributing keys that uses quantum mechanics to secure data transmission.

Bit Flipping Attack

An attack method that involves altering bits in ciphertext to change the corresponding plaintext.

Birthday Attack

A type of attack that exploits the probability of duplicates in hash functions.