cryptography

1. Basics of Cryptography
Introduction to Secure
Communication
[Your Name/Institution]

2. Introduction
• • Definition of Cryptography
• • Importance in modern security
• • Examples: Online banking, messaging,
passwords

3. Goals of Cryptography
• • Confidentiality: Protects data
• • Integrity: Ensures data isn't altered
• • Authentication: Verifies identity
• • Non-repudiation: Prevents denial

4. Types of Cryptography
• 1. Symmetric Key Cryptography
• 2. Asymmetric Key Cryptography
• 3. Hash Functions

5. Symmetric Key Cryptography
• • Uses same key for encryption & decryption
• • Fast but key must be kept secret
• • Examples: AES, DES

6. Asymmetric Key Cryptography
• • Uses public & private keys
• • Secure for communication but slower
• • Examples: RSA, ECC

7. Hash Functions
• • Converts data into fixed-size output
• • Used for password hashing, digital
signatures
• • Examples: MD5, SHA-256

8. Real-World Applications
• • Secure Communication: HTTPS, VPNs
• • Digital Signatures: Documents & contracts
• • Cryptocurrency: Bitcoin, Ethereum
• • Authentication Systems: OTPs, biometric
security

9. Future of Cryptography
• • Quantum Cryptography: Next-gen security
• • AI & Machine Learning in Cryptography
• • Zero-Knowledge Proofs & Privacy
Enhancements

10. Conclusion
• • Cryptography secures our digital world
• • Continuous improvements are needed
• • Stay updated with latest encryption
standards

11. Q&A
• Feel free to ask any questions!