The Software AES is a cryptographic library encrypting and decrypting 128-bit data blocks through a secure AES algorithm. The AES key length can be chosen among 128, 192 or 256 bits. The library supports the ECB (Electronic Code Book), CBC (Cipher Block Chaining), OFB (Output Feedback), CTR (Counter) and GCM (Galois/Counter) modes. The AES algorithm integrates state-of-the-art countermeasures against side-channel attacks.