Originally, I wanted to write up the write-up for the airport challenge, but since Niklas has already done that, I’m doing the Wood Island challenge instead. It was worth 150 points on the Boston Key Party 2015.
The goal was to break ElGamal Signatures. In short, the solution is based on exploiting “random” values that occur multiple times.
more here..........https://kitctf.de/writeups/bkp2015/wood-island/
The goal was to break ElGamal Signatures. In short, the solution is based on exploiting “random” values that occur multiple times.
more here..........https://kitctf.de/writeups/bkp2015/wood-island/