Improving Performance ECDH on Curve25519

• Main Author: MIFTAHUL ASHARI (NIM : 23214348), WAHID
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/24664
• Institution: Institut Teknologi Bandung

Instant messaging is application used by 61 % of the world population .The majority of systems security this application use end-to-end-encryption. In end-to-end-encryption there are several algorithm and protocol supporting as HKDF, HMAC, SHA-512, AES, and ECDH. ECDH in end-to-end-encryption algorithm ecc Curve25519. Curve25519 having complexity and a mathematical operation very complex. Things have led to this algorithm slower compared to other cryptography algorithm. Based on the description above then this study attempts to improve the performance of an algorithm Curve25519 by means of a proposed new library which specializes in handling ecdh protocol in Curve25519. Library Curve25519 was previously NaCl and Curve25519-Donna 1.3. Library it has the advantages and disadvantages of each. Library NaCl having shortage of rapid calculation while library Curve25519-Donna 1.3 have weaknesses of a high degree of variation of time which occurs. It is expected that from the new library developed in this research can generate a new library that can overcome the weaknesses in the previous library.