Encrypt or decrypt short text with common algorithms—useful for learning, testing, or demos—not for storing real secrets long-term.
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Frequently Asked Questions
The numbers refer to key length in bits. AES-256 uses 256-bit keys (strongest), AES-192 uses 192-bit, and AES-128 uses 128-bit. All are secure, but AES-256 provides the highest security level.
CBC (Cipher Block Chaining) requires an IV and provides confidentiality. GCM (Galois/Counter Mode) provides both confidentiality and authenticity, and is generally recommended for new applications.
No, DES is considered insecure due to its short key length. 3DES is more secure but deprecated. Use AES for all new applications.
Use the decrypt function with the encrypted data, the same key and algorithm used for encryption, and the IV (if using CBC mode).