Algorithm Comparison
Encryption Algorithm Performance & Security
Compare the different encryption algorithms based on their performance, security level, key size requirements, and historical significance. This comparison helps you choose the right algorithm for your specific encryption needs.
| Algorithm ↑ | Speed | Security | Key Size | Year | Status |
|---|---|---|---|---|---|
| 3DES | Slow | 70/100 | 168 bits | 1995 | Legacy |
| AES | Medium | 95/100 | 256 bits | 2001 | NIST Standard |
| Blowfish | Medium | 70/100 | 448 bits | 1993 | Public Domain |
| ChaCha20 | Fast | 90/100 | 256 bits | 2008 | RFC 8439 |
| DES | Medium | 40/100 | 56 bits | 1975 | Deprecated |
| OTP | Fast | 100/100 | Variable (1:1) | 1882 | Theoretical |
| Rabbit | Fast | 75/100 | 128 bits | 2003 | eSTREAM Portfolio |
| RC4 | Fast | 30/100 | 128 bits | 1987 | Deprecated |
Symmetric vs Asymmetric
Symmetric encryption uses the same key for encryption and decryption. It's fast and efficient for large data but requires secure key exchange.
Asymmetric encryption uses a pair of keys (public and private). It's slower but solves the key distribution problem and enables features like digital signatures.
Block vs Stream Ciphers
Block ciphers (AES, DES, 3DES) encrypt fixed-size blocks of data. They're versatile and can operate in different modes.
Stream ciphers (RC4, ChaCha20) encrypt data one bit or byte at a time. They're typically faster and have less complexity, but can be vulnerable if misused.
Choosing the Right Algorithm
- For general use: AES-256 is the industry standard, offering excellent security and performance.
- For legacy systems: 3DES provides backwards compatibility while maintaining reasonable security.
- For high-speed applications: ChaCha20 or Rabbit offer excellent performance while maintaining good security.
- Avoid: DES and RC4 are considered cryptographically broken and should not be used for sensitive information.
- One-Time Pad: Theoretically unbreakable but impractical for most applications due to key management issues.