Encrypt sensitive text data securely using AES (GCM/CBC) algorithms client-side.
AES (Advanced Encryption Standard) is the industry standard for symmetric encryption. This tool allows you to encrypt plaintext strings client-side using secure AES GCM or CBC modes with a secret passphrase. The secret key is derived securely via SHA-256 hashing.
AES-GCM (Galois/Counter Mode) provides both confidentiality and data integrity authentication. It protects against tampering or modification of the ciphertext. AES-CBC (Cipher Block Chaining) is an older mode that provides confidentiality but lacks built-in authentication, making it susceptible to padding oracle attacks if not combined with a MAC.