Combination of advanced encryption standard 256 bits with md5 to secure documents on android smartphone
Hendra Halomoan Pasaribu, Delima Sitanggang, Rudolfo Rizki Damanik, Alex Chandra Rudianto Sitompul · Journal of Physics Conference Series · 2018
File transfer by using a smartphone has some security issues like data theft by irresponsible parties. To improve the quality of data security systems on smartphones, in this research the integration of AES 256 bit algorithm by using MD5 hashing is proposed. The use of MD5 aims to increase the key strength of the encryption and decryption process of document files. The test results show that the proposed method can increase the key strength of the encryption and decryption process in the document file. Encryption and decryption time by using AES and MD5 combination is faster than using AES only on *.txt file type and reverse results for *.docx, *.xlsx, *.pptx and *.pdf file files.