Decrypt given data previously encoded with bf-ofb cipher algo. Blowfish in OFB (Output Feedback) mode. OFB mode turns a block cipher into a synchronous stream cipher by using a feedback loop. Introduced as part of Blowfish's design by Bruce Schneier in 1993, OFB mode is one of the feedback modes designed to improve security over ECB. Considered more secure than ECB but less secure than CBC or CFB, as it still suffers from problems with key reuse and error propagation. 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.