Uhm... A little vague?
I think people might be able to help you if you actually gave some more details. I'm very uncertain what to make of your post.
If you're using private keys generated from standard pseudorandom sequence of numbers generated in programming languages like C or C++, the total possible number of private keys that can be generated that way is: 4294967296 (if you're using programs written in Java, the number is: 281474976710656).
Source:
https://www.offlineaddress.com/?site=about#security-riskMoreover, 1/100 probability does not mean the collision will be at 100th time. It may happen at 1st time as well.
So, can reverse engineering this public/private combination possible ?
I have encountered a new kind of randomness in bitaddress.org. It is based on mouse movement. Do u people think it makes thing difficult or easier ?