One of the earliest public key cryptosystems still in use for safe data transfer is called RSA (Rivest–Shamir–Adleman). Information hiding is a component of steganography. Since compressed data is easier to handle and more secure, data compression is a crucial component of information security. https://www.indjcst.com/archives/paper-details?paperid=37&papertitle=review-on-rsa-cryptography-steganography-and-compression-techniques-for-data-security