I'm inclined to agree with the original poster. If it's really as deeply insecure as you claim it is, you should be able to crack it in less than the 3 hours of time (that you also claim the proposed prize is worth). The OP even offered to increased the prize money if you think it'll take longer than that.

In other words, sometimes, you have to put your money where your mouth is. The OP is doing that. You're not.