AES Text Encrypt / Decrypt

Demo only: simplified passphrase -> key; real apps need salt + IV + AES-GCM.
Browser‑only AES (CryptoJS). For serious security, prefer audited libs, authenticated modes with salt + IV + key derivation.

About AES

AES (Advanced Encryption Standard) is a symmetric block cipher standardized by NIST (FIPS-197). It operates on 128-bit blocks with 128/192/256-bit keys. Security depends on correct mode, randomness, and key management—not just the algorithm name.

Security Notes

This demo uses a simplified passphrase shortcut (CryptoJS) without explicit salt, IV control, or authenticated encryption. For real applications use: a strong passphrase → KDF (Argon2 / PBKDF2) → key bytes; random per-message IV; authenticated mode (AES-GCM) to detect tampering; store salt + IV with ciphertext. Never reuse IVs; avoid ECB; do not roll your own crypto primitives.

AES encrypt/decrypt online – in browser, no upload (FAQs)

FAQs

Is this AES secure?
This is a demo using CryptoJS passphrase mode. For production, use a KDF, random IV, and AES-GCM.
Where is encryption done?
In your browser only; no data is uploaded.
What about key derivation?
Use PBKDF2/Argon2/scrypt to derive keys from passphrases.

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AES encryption FAQs

FAQs

What mode should I use?
Prefer GCM for authenticated encryption. Use unique IVs and never reuse keys+IVs.
Is AES-256 better than AES-128?
Both are secure; AES-256 offers larger key space but may be slower.

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