Traditional Ciphers III: Symmetric and Asymmetric Cryptographic Algorithms
"Learn about symmetric and asymmetric cryptographic algorithms, including their differences, strengths, and weaknesses. Explore common algorithms like DES, 3DES, and AES, and understand the importance of key distribution in secure communication."
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Presentation Transcript
Principles of Cyber Security Lecture Lecture 09 09: : Traditional Traditional Ciphers_III Ciphers_III Dr. Dr. Muamer Muamer Mohammed Mohammed 1
Objectives 9.1 Describe symmetric, and asymmetric cryptographic algorithms.
Symmetric Cryptographic Algorithms Symmetric cryptographic algorithms use the same single key to encrypt and decrypt a document. Common algorithms include: Data Encryption Standard (DES) Triple Data Encryption Standard (3DES) Advanced Encryption Standard (AES) 3
Asymmetric Cryptographic Algorithms The primary weakness of symmetric algorithms: distributing and maintaining a secure single key among multiple users distributed geographically poses challenges Asymmetric cryptographic algorithms use two mathematically related keys. Also known as public key cryptography Public key available to everyone and freely distributed Private key known only to individual to whom it belongs 5
Summary Symmetric cryptography (also called private key cryptography) uses a single key to encrypt and decrypt a message. Asymmetric cryptography (also known as public key cryptography) uses two keys instead of one. 7
