Mobile Phone Number Privacy Scheme Based on Lightweight Hash Mapping.

The mobile phone number of each mobile user corresponds to a call record of the communication system database. This paper analyzes the security risk of the mobile phone number and related material stored in the communication system database, that is, inside technicians or administrators can steal obscurely user's call number, call time, SMS content and other important information. Aiming at these hidden dangers, this paper proposes a scheme which uses the lightweight hash digest of a mobile phone number to replace the original mobile phone number delivery. Additionally the scheme considers integratively hash mapping, hierarchical database management and mobile phone charging to avoid affecting user's read of communication fees. The analysis shows that the scheme can effectively prevent inside jobs and resist birthday attacks.