Cryptography & Data Security

Man in the Middle Attack

A security breach where an attacker intercepts communication between two parties.

What are the three options for a man in the middle attacker?

View, intercept, repeat.

Cryptography

A form of secret writing used to secure data.

Symmetric Encryption

A type of encryption where the same key is used for both encryption and decryption.

Transposition Ciphers

A method of encryption that involves swapping the order of letters in a fixed pattern.

Caesar Cipher

A specific example of a transposition cipher that shifts letters by a fixed number.

Substitutional Ciphers

A method of encryption where each letter is replaced by another letter.

Frequency Analysis

A method that poses a threat to transposition and substitutional ciphers, analyzing the frequency of letters.

One-Time Pad

An encryption method using a single-use pre-shared key that requires true randomness.

Polyalphabetic Ciphers

Ciphers that use multiple substitution alphabets for encryption.

Kerckhoff's Principle

The principle stating that the security of a cryptographic system should not depend on the secrecy of the algorithm but rather the secrecy of the key.

Asymmetric Encryption

A type of encryption that uses a pair of keys, one public and one private.

Public Key Encryption

A type of asymmetric encryption where a public key is used to encrypt data and a private key is used to decrypt it.