Decrypt given data previously encoded with desx cipher algo. DES-X is an enhanced version of DES, using key whitening techniques to improve its security by adding additional bits to the DES algorithm. DES-X was introduced as an attempt to strengthen DES by mitigating its vulnerability to brute-force attacks by expanding the key space. Although more secure than DES, DES-X is still considered vulnerable due to the short key size and its reliance on the aging DES algorithm. Our decryption process assumes the IV string is prepended in the encoded string during the encryption process. You can not decrypt and get the correct results if the IV or passphrase mismatch occurs between encryption and decryption process.