This final project is discussed about implementation of digital signature on email delivery with java programming language. Digital signature is one of the cryptographic security services that provide assurance to the recipient of the message (receiver). Given the assurance that the sender of the message is the sender, not a third party (eyesdropper) and received messages are genuine. Elliptic Curve Digital Signature Algorithm (ECDSA) is one method of digital signatures on Elliptic Curve Cryptography (ECC). ECC is a public-key cryptography using the Elliptic Curve Discrete Logarithm Problem (ECDLP) as the basic math. ECDLP used is Q = kP, where Q and P are the points on the elliptic curve of F2m Finite field and k is positive integers. This final project provide an email client application that integrated with ECDSA algorithm, so it can be able to provide digital signature on sent message, to verify the digital signature on a received message, and give a warning if the verification fails, which means received email was not genuine
