Take the 2-minute tour ×
Cryptography Stack Exchange is a question and answer site for software developers, mathematicians and others interested in cryptography. It's 100% free, no registration required.

For example, two people want to know who is the older, without disclosing their age. Is there a secure way to do this without a third party involved?

share|improve this question

1 Answer 1

up vote 3 down vote accepted

Of course there are ways to do that.

See for example, Secure Integer Comparison with Applications in Economics which is implemented in VIFF.

Also, solutions to the millionaire's problem would probably do the trick too. There are lots of these. Just search around for solutions to that problem.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.