Encrypt given data using blowfish cipher algo. Blowfish is a symmetric block cipher designed to replace the aging DES algorithm. It is fast, simple, and offers strong security. Developed by Bruce Schneier in 1993, Blowfish was initially designed as a fast alternative to DES and was widely used in the 1990s. Blowfish is considered secure for most applications but has a small 64-bit block size, making it vulnerable to certain attacks like birthday attacks. It's generally seen as outdated. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.