There is no such thing in public key crypto.
The only thing that comes close to it that I can think of is the problem where weak public parameters were hard coded in a library (Apache) and were used by many many many person. Look at the logjam paper.
There is no such thing in public key crypto.
The only thing that comes close to it that I can think of is the problem where weak public parameters were hard coded in a library (Apache) and were used by many many many person. Look at the logjam paper.