I been trying to solve a particular challenge where we have to sign an admin message.
At first it seems a classic RSA blind signature attack but eventually they didnt give out the public exponents(e,n) and e is of prime(128) length.
The server offers to encrypt anything n number of times but not the admin message and there's is a option for verification,if we verify the admin message we get the flag!
But im completely stuck here any help would be appreciated.
Thanks.