An Implementation Of Elias Delta Code And ElGamal Algorithm In Image Compression And Security

4th International Conference on Operational Research

Rachmawati, Dian^1 ; Budiman, Mohammad Andri^1 ; Saffiera, Cut Amalia^1

Departemen Ilmu Komputer, Fakultas Ilmu Komputer Dan Teknologi Informasi, Universitas Sumatera Utara, Jl. Universitas No. 9-A, Medan

20155, Indonesia^1

关键词: Asymmetric key;    Average values;    Code algorithms;    Compression algorithms;    Data storage;    File sizes;    Prime test;    Space savings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/300/1/012040/pdf
DOI  :  10.1088/1757-899X/300/1/012040

来源: IOP

【 摘 要 】

In data transmission such as transferring an image, confidentiality, integrity, and efficiency of data storage aspects are highly needed. To maintain the confidentiality and integrity of data, one of the techniques used is ElGamal. The strength of this algorithm is found on the difficulty of calculating discrete logs in a large prime modulus. ElGamal belongs to the class of Asymmetric Key Algorithm and resulted in enlargement of the file size, therefore data compression is required. Elias Delta Code is one of the compression algorithms that use delta code table. The image was first compressed using Elias Delta Code Algorithm, then the result of the compression was encrypted by using ElGamal algorithm. Prime test was implemented using Agrawal Biswas Algorithm. The result showed that ElGamal method could maintain the confidentiality and integrity of data with MSE and PSNR values 0 and infinity. The Elias Delta Code method generated compression ratio and space-saving each with average values of 62.49%, and 37.51%.