Cryptography Course Presentation by Dr. Adel A. El-Zoghabi

This set of flashcards covers key vocabulary and concepts from Dr. Adel A. El-Zoghabi's lecture on cryptography.

Cryptography

The basic foundation for all security topics in computer networks; its main purpose is to achieve message privacy.

Hashing

A subfield in cryptography aimed at achieving message integrity, message authentication, message non-repudiation, and people authentication.

PGP (Pretty Good Privacy)

Provides application layer security to secure eMail messages.

SSL/TLS

Available at the transport layer to secure TCP segments.

IPSec

Available at the network layer to secure IP datagrams, typically used in VPNs.

Firewall

A security system designed to protect a site from intruders or malicious software.

C.I.A. Triad

A model for information security consisting of three main principles: Confidentiality, Integrity, and Availability.

Passive Attack

An attack that seeks to merely observe or analyze the data being transmitted without interfering.

Active Attack

An attack that involves the modification, insertion, or deletion of data in transit.

Symmetric-Key Cryptography

Encryption where the same key is used by both the sender and receiver.

Asymmetric-Key Cryptography

Uses a pair of keys: a public key for encryption and a private key for decryption.

Plaintext

The original, unencrypted message.

Ciphertext

The coded (encrypted) message.

Cipher

The algorithm used for transforming plaintext into ciphertext.

Encipher (Encrypt)

The process of converting plaintext into ciphertext.

Decipher (Decrypt)

The process of recovering plaintext from ciphertext.

Cryptanalysis

The study of methods for deciphering ciphertext without knowing the key.

WiFi Security

Security measures for wireless networks, including standards such as WEP, WPA, WPA2, and WPA3.