Terapan Metode Least Significant Bit untuk Deteksi Keaslian e-Sertifikat

Abstract

The ease of accessing digital information allows someone to change or manipulate the data contained in the information. Therefore, the security of information or important data from intruders or unauthorized access is important. One case that is currently rife is the spread and falsification of information through fake e-certificates. The purpose of this research is to increase security, as well as check the authenticity and validity of data on ecertificates using steganography techniques with the Least Significant Bit (LSB) method. LSB facilitates the insertion of secret messages with fewer pixels of distortion than other steganography methods. However, LSB is more easily detected by steganalysis. The weakness of LSB becomes an advantage to solve the problem of e-certificate authenticity. The image on the certificate in the form of a pdf file will be inserted with information to validate whether the certificate is genuine or not, by reading the pixels in the image in the file. In this research, the data to be inserted is a checksum value form of 32 hexadecimal characters and also an e-certificate information form a JSON string. The result of this research is a web-based application that is able to check the authenticity of e-certificates.