How to implement order preserving encryption or order preserving hashing

Question

Does anybody know any free implementation of either order preserving encryption or order preserving hashing? I've found some codes like CMPH but I need to dynamically add new DATA and that's why most of them doesn't apply.

Thank you!

Answer 1

CryptDB implements order-preserving encryption, and its source code is publicly available. In fact, rather than building your own system that uses order-preserving encryption, you might try just using CryptDB.

Alternatively, in a pinch, I suppose you could take one of the papers that describes an order-preserving encryption algorithm and implement it yourself.