This was one of the factors (certainly not the only one) that made me move out of the field of cryptography - I was doing work related to attempting to break a

This was one of the factors (certainly not the only one) that made me move out of the field of cryptography - I was doing work related to attempting to break a major cryptosystem and I realised that I wasn't completely sure what the right course of action was ethically in the slim chance that I succeeded. My background was in pure mathematics and up until I moved into cryptography, it seemed obvious that openess of information was an obvious good. However, once in the crypto field, it became much a much more ambiguous issue.