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AES vs ChaCha20: differences, advantages and when to use each
AES and ChaCha20 are two modern symmetric encryption algorithms. Which one is best depending on the context?
Both AES and ChaCha20 are symmetric encryption algorithms, but they differ in their structure, performance, and resistance to certain attacks.
AES
- Based on block operations.
- Highly hardware optimized.
- Used in TLS, VPNs, secure storage.
##ChaCha20
- Stream encryption.
- Fast on devices without AES acceleration.
- Used by Google and OpenSSH.
Comparison
| Feature | AES | ChaCha20 |
|---|---|---|
| Speed on modern CPUs | High | Medium |
| Speed on mobiles | Low | High |
| Security | High | High |
| Simplicity of implementation | Medium | High |
Which one to choose?
- Use AES if you have compatible hardware and need high performance.
- Use ChaCha20 on mobile or where AES is not optimized for support.
