Policy-Based Cryptography and Applications

In this paper, we formulate the concept of policy-based cryptography which makes it possible to perform policy enforcement in large-scale open environments like the Internet, with respect to the data minimization principle according to which only strictly necessary information should be collected for a given purpose. We use existing cryptographic primitives based on bilinear pairings over elliptic curves to develop concrete policy-based encryption and signature schemes which allow performing relatively efficient encryption and signature operations with respect to policies formalized as monotonic logical formulae. we illustrate the properties of our policy-based cryptographic schemes through the description of three application scenarios.

• Type: Conference
• Year: 2005
• Where: FC
• Authors: Walid Bagga, Refik Molva
• Keywords: Concrete Policy-based Encryption, FC 2005, Policy-based Cryptographic Schemes, Policy-based Cryptography