I have a program which is protected by ECDSA afaik.The protection is not a big deal one byte patch removes all limitations but I am interested with serial scheme.It uses ECDSA and by examinin exe I learned that it uses borzoi library.I guess also it use Degree 163 Binary Field.Could anyone give me a hint about this ?

program winvdr hxxp://www.artech365.com
borzoi library hxxp://dragongate-technologies.com

Thanks.

Hi,

163bit is very strong and borzoi uses standard NIST-curves. The chance of getting the private key is very low. Maybe there are some implementation failures, which allows you to get the private key, borzoi is open source. If they choose weak curves there is a chance, but with NIST-curves.....
check:h**p://www-rcf.usc.edu/~mdhuang/cs599/MOV.pdf

good luck,
AdamA