> encrypt | decrypt | secure <
// Encrypt and decrypt text with AES-256 military-grade encryption
AES-256 Encryption
Military-grade AES-256 encryption approved by NIST. Used by governments and organizations worldwide to protect classified information.
PBKDF2 Key Derivation
100,000 iterations of PBKDF2-SHA256 key derivation. Converts your password into a cryptographically strong encryption key.
Zero Server Processing
All encryption and decryption happens entirely in your browser. Your data and passwords never leave your device.
// ABOUT AES ENCRYPTION
How AES Works:
AES (Advanced Encryption Standard) is a symmetric block cipher based on the Rijndael algorithm, standardized by NIST as FIPS 197. It operates on 128-bit blocks using key sizes of 128 or 256 bits. AES-GCM provides authenticated encryption with additional data integrity, while AES-CBC provides confidentiality with PKCS7 padding.
Example:
"Hello" + password → AQJx8f3k... (Base64 encrypted output)
Key Features:
- >NIST FIPS 197 approved symmetric encryption
- >AES-GCM authenticated encryption mode
- >PBKDF2 key derivation with 100,000 iterations
- >Random salt and IV for every encryption
- >Client-side Web Crypto API implementation
>> frequently asked questions
Q: What is AES encryption?
A: AES (Advanced Encryption Standard) is a symmetric encryption algorithm adopted by the U.S. government and used worldwide. Based on the Rijndael cipher, it was standardized by NIST as FIPS 197 in 2001. AES encrypts data in fixed 128-bit blocks using key sizes of 128, 192, or 256 bits.
Q: What is the difference between AES-GCM and AES-CBC?
A: AES-GCM (Galois/Counter Mode) provides both encryption and authentication, detecting any tampering with the ciphertext. AES-CBC (Cipher Block Chaining) provides encryption only and requires separate integrity checking. AES-GCM is recommended for most use cases due to its built-in authentication.
Q: Is client-side AES encryption secure?
A: Yes, this tool uses the Web Crypto API built into your browser, which provides cryptographically secure implementations. Your data and password never leave your device. The encryption uses PBKDF2 with 100,000 iterations for key derivation, random salts, and random IVs for each encryption operation.
Q: What is PBKDF2 key derivation?
A: PBKDF2 (Password-Based Key Derivation Function 2) converts your password into a cryptographic key by applying a pseudorandom function (SHA-256) repeatedly with a random salt. The 100,000 iterations make brute-force attacks computationally expensive, protecting against dictionary and rainbow table attacks.
Q: Should I use AES-128 or AES-256?
A: AES-256 provides a larger key space (2^256 vs 2^128 possible keys) and is recommended for maximum security. AES-128 is still considered secure and is slightly faster. Both are approved by NIST for protecting classified information, but AES-256 is required for TOP SECRET data.