Increasing Privacy in Mobile Communication Systems using Cryptographically Protected Objects

Confidential information contained in the transactional data created in mobile communication systems is not very well protected. We present an approach to protect entire objects against manipulation and disclosure, which allows to retain some control over information handed to a different entity or can be used to prevent reverse engineering of an object to obtain its original source. The approach is subsequently used in the context of mobile communication systems to protect the current location of a mobile user against unauthorized access.