Date Added: Jan 2012
As an important composition of trust computing, privacy preserving is a prerequisite of modern information technology. Although security behavior requires confidentiality for trust computing, privacy information is typically difficult to be hidden in traffic analysis systems based on mobile probe data. This paper focused on a traffic speed estimation method via mobile probe data, which provides privacy protection. User privacy is well-protected by encrypting IDs, separating the encrypting process and estimating without using spatiotemporal historical data.