Elliptic Curve Digital Signature Algorithm (ECDSA) w/ JAVA

Elliptic Curve Digital Signature Algorithm (ECDSA) - Public Key Cryptography w/ JAVA (tutorial 10)

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00:08 demo the app.  02:20 send a simple ASCII message  02:32 what happens if message is signed with invalid key  03:12 what happens if message is signed with valid key  04:30 why solve ECDLP  05:56 ECDSA quick summary  06:12 What are domain params  06:35 How to calculate public key  06:57 sending ECDSA signed message  07:53 receiving and verifying ECDSA signed message  09:06 code the app.  09:40 setup JSON for this project  10:10 test data used in this project  10:18 go over various packages and classes in this project  11:46 code server side Server and ServerThread classes  14:20 handle incoming JSON messages in ServerThread  15:35 code client side  15:43 start coding Point class  16:05 start coding Client class  17:38 start coding ClientThread class  18:06 start coding EllipticCurve class  20:50 make sure elliptic curve is not singular  21:58 check if point is on elliptic curve  23:31 define point at infinity  23:53 finish coding Point class  24:50 check if 2 points are inverses of each other  25:22 points addition and point doubling  26:12 double and add algorithm  27:10 calculate public key functionality in Client class  28:28 pickup hash sign and send message in Client class  28:59 hashing functionality 29:42 ephemeral key pickup  30:03 signing key pickup  30:55 use ephemeral key to calculate r  31:31 finish coding ClientThread class  31:50 receive JSON messages in ClientThread class  33:31 test run completed application in hex mode  34:30 Alice uses secp256k1 (the bitcoin curve)  35:22 Bob uses secp384r1 curve  36:23 test run Alice sending signed message(s)  and Bob validating if message(s) signed by Alice  38:08 test run Bob sending signed message(s)  and Alice validating if message(s) signed by Bob  38:50 what Eve needs to do in order to sign messages as being Alice or Bob ----------------------------------------------------------------------------------------------------------------------------- quickly download, import into Eclipse, and run zip file for 'Elliptic Curve Digital Signature Algorithm (ECDSA) - Public Key Cryptography w/ JAVA (tutorial 10)' ----------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------- download source code @ https://sites.fastspring.com/prototypeprj/instant/2020 download source code @ https://sites.fastspring.com/prototypeprj/instant/all -----------------------------------------------------------------------------------------------------------