1. eBay, http://www.ebay.com/
2. Amirbekyan, A., Estivill-Castro, V.: A new efficient privacy-preserving scalar product protocol (2007)
3. Chakraborty, S., Ray, I.: Trustbac: integrating trust relationships into the rbac model for access control in open systems. In: Proceedings of the eleventh ACM symposium on Access control models and technologies (SACMAT 2006), pp. 49–58. ACM, New York (2006)
4. Gal-Oz, N., Grinshpoun, T., Gudes, E., Meisels, A.: Cross-community reputation: Policies and alternatives (2008)
5. Gal-Oz, N., Gudes, E., Hendler, D.: A robust and knot-aware trust-based reputation model (2008)