The document discusses cryptography basics and why it is important for security. It introduces common cryptography terms like encryption, decryption, plaintext and cyphertext. It also outlines some common encryption operations and ciphers used like the Vernam Cipher, Running Key Cipher, DES, Triple DES, AES, and asymmetric encryption. The document emphasizes that if confidentiality or accuracy of information is valuable, it should be properly secured using cryptography.

1. Cryptography Basics Ali Sadhik Shaik [email_address] Edith Cowan University; Risk and Security Management .

2. Why Cryptography? Security Ali Sadhik, Edith Cowan University E-business

3. Ali Sadhik, Edith Cowan University Technical Aspects of security is cryptography Encrypting data against disclosure, Modification Signing data against modification, Repudiation

4. If the confidentiality or accuracy of your information is of any value at all, it should be protected to an appropriate level. If the unauthorized disclosure or alteration of the information could result in any negative impact, it should be secured. Ali Sadhik, Edith Cowan University

5. Generic way Ali Sadhik, Edith Cowan University

6. Cryptography terms Encryption: A process by which a plaintext is converted to cyphertext using a key Decryption: A process by which cyphertext is converted to plaintext. Plaintext: data. Ali Sadhik, Edith Cowan University

7. Encryption Operations Common Ciphers Vernam Cipher (one-time Pad) Running Key Cipher Symmetric Encryption Data Encryption Standard (DES) Triple DES Advanced Encryption Standard (AES) Asymmetric Encryption Ali Sadhik, Edith Cowan University

8. Reference: “ Management of Information Security” Whitman, M E & Mattord, H J. Ali Sadhik, Edith Cowan University