Encrypt/Decrypt
What It Teaches
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What This Cryptography Showcase Teaches:
Core Concepts
- Substitution Ciphers - Caesar and Atbash show how characters can be replaced with other characters
- Polyalphabetic Ciphers - Vigenère demonstrates multiple substitution alphabets
- Transposition Ciphers - Shows how rearranging characters creates encryption
- Symmetric vs Asymmetric - Contrasts methods like AES (symmetric) and RSA (asymmetric)
Historical Context
These algorithms span from ancient Rome (Caesar) to modern secure communication (AES/RSA), showing the evolution of cryptography through history.
Security Principles
- Key Management - The importance of secure key exchange and storage
- Complexity vs Security - How algorithm complexity impacts security strength
- Attack Vectors - Introduction to frequency analysis and other cryptanalysis techniques
Programming Concepts
This showcase demonstrates:
- String manipulation and character encoding
- Array operations and matrix transformations
- Modular arithmetic
- Basic cryptographic implementation principles
Final Documentation
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Cryptography Report
Encryption Activity Log
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Algorithm Performance
| Algorithm | Avg. Processing Time | Usage Count | Security Level |
|---|---|---|---|
| Caesar Cipher | < 1ms | 0 | Very Low |
| Atbash Cipher | < 1ms | 0 | Very Low |
| Vigenère Cipher | < 1ms | 0 | Low |
| Transposition Cipher | < 1ms | 0 | Low |
| RSA | ~5ms | 0 | High |
| AES | ~2ms | 0 | High |
Security Analysis
The implemented algorithms vary greatly in security:
- Caesar & Atbash: Historical interest only; can be broken instantly with modern computing
- Vigenère: More complex but still vulnerable to frequency analysis with sufficient ciphertext
- Transposition: Security depends on key length, but generally weak against modern cryptanalysis
- RSA: Modern asymmetric algorithm with strong security when properly implemented
- AES: Industry standard symmetric encryption with excellent security properties