Proof-of-concept implementation of Damgard et al. secure comparison protocol as proposed in "Secure comparison for online auctions" by Ivan Damgard et al.
The code has been written in c++ with Pari c Library for number theoretic operations.
Example Parameter values for running the protocol correctly -
- Compile and run the file "Bidder.cpp"
- First enter "1" to use the protocol in 32 bit mode.
- Then input
l = 33 - Then input
t = 20.
You should now get one of the values in the output to be as "1" ifm1>x1.