What's the difference between symmetric and asymmetric encryption?

Symmetric uses one key (fast, e.g. AES); asymmetric uses public/private pairs (slower, e.g. RSA)—often combined in TLS.

Should I use AES, DES, or 3DES?

Use AES (128/192/256-bit) today; DES is breakable and 3DES is slow—avoid for new work.

For learning and quick tests only—use audited server-side crypto (Web Crypto API) for real secrets.

Text

Cipher

Symmetric encryption algorithm:Enter key:

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