In real applications, this is not practical. Certain manipulations of an image, such as compression, image translation, global intensity alteration, etc., should be distinguishable from malicious, content altering manipulations. The inventive authentication technique achieves this objective through a process for generating invariant features of an image and creating an authentication signature using private key encryption. Depending on which of the above situations is encountered, one of the two algorithms for generating an authentication signature is used. Software implementing these technologies has been written and tested.
Collaborations are in process for using the software in the new media industry in New York City.
They are capable of operating in real-time. The authentication system is unique in that it is capable of reliably detecting malicious alterations while permitting commonly used procedures while permitting commonly used procedures for manipulating visual information that do not alter the content. Image security is a burgeoning field.