COMBINATION OF CRYPTOGRAPHY AND STEGANOGRAPHY IN IMPROVING TEXT DATA SECURITY USING DES (DATA ENCRYOTION STANDARD) AND LSB (LEAST SIGNIFICANT BIT) METHODS

Abstract

Information security in this globalized era is increasingly becoming a vital requirement in various aspects of life. Information will have a higher value if it concerns aspects of business decisions, security, or public interest. The purpose of this research is to increase the security of text data by using cryptography and Steganography techniques. Cryptography is the science of keeping messages secret by encoding them into a form that is no longer understandable. The DES (Data Encryption Standard) method is a symmetric encryption algorithm, where the message encryption and decryption processes use the same key. Steganography is a technique of disguising messages into a medium without other people realizing that the media has been inserted with a message, because the output of steganography is data that has the same form of perception as the original data when viewed using human senses. The LBS (Least Significant Bit) method is a steganography method that works to insert messages by replacing the lowest bit in a byte of image media as a message carrier. The combination of these two methods is expected to increase the security of text data in the form of messages or information, and make it difficult for irresponsible parties to open the message.