Rancang Bangun Sistem Pengamanan Dokumen Pada Sistem Informasi Akademik Menggunakan Digital Signature dengan Algoritma Kurva Eliptik

Abstract

Improved document security on any information output at Sistem Informasi Akademik (SIA) of UNP is by adding a digital signature. The use of elliptic curve digital signature based on Elliptic Curve Discrete logarithm problem (ECDLP) on the elliptic curve modulo a prime has a high level of security. SIA application in this thesis produce printed output of documents that have been added (embedded) with signature. The Signature of Information (Plaintext) which are encrypted in the process of signing the “NIM, IP, type of document and print time” where all four of these variables are encrypted with the elliptic curve algorithms in Finite Fields FPm and generate the public key r stored in a database table, a private key s and the ciphertext (ds code). In the test application signatures (verifying) with decrypt the ciphertext (ds code) is entered, if the public key value and the four variables is match than the application will be displayed information from the document valid. Testing the level of security and reliability of the signature using a sniffing program Wireshark and Chain & Abel. And performance testing web pages using firebug applications. This thesis research resulted in the application "SIA" which was added a signature and the signature validity reader application. From the test results, the signature can not be hacked and cracked with application-sniffing, and the perifying application is show the average access time of 110 ms. The Verifying web application takes a long time to decrypt the digital signature, but is comparable to the security and reliability of information generated by the system with this elliptic curve algorithms. Keywords : Sistem Informasi Akademik (SIA), elliptic curve algorithms, public key, private key.