Re: Creating and saving IDs - is there a theory?

Lior Messinger wrote: > > Hi, > > We are designing a project where we need to create, save and then verify > huge amounts of IDs (or serial numbers), for inventory items. We need to do > the saving part and the verification very fast, on a server. This is done > to verify that the items are not faked. Not sure I fully understand the requirement, but there are techniques you can use to create an ID and verify that it has not been faked without using a database of all the IDs you have created. It depends on the degree of confidence you need, anything from fairly simple checksumming to advanced crypto-sealing techniques might fit the bill. We use crypto techniques in a database Web application to generate URLs that cannot be forged (at a cost that justifies the expense).