Efficient public-key certificate revocation schemes for smart grid

The public key cryptography will play an essential role in securing the smart grid communications. For the secure use of the public key cryptography, an efficient and secure certificate revocation scheme specially tailored to smart grid architecture should be adopted. In this paper, we study certificate revocation in smart grid and design efficient and scalable certificate revocation schemes. The schemes have different security strengths and require different overhead levels. We also propose an efficient certificate revocation scheme for pseudonymous public key infrastructure using compressed certificate revocation lists. Analytical results demonstrate that using revocation schemes is essential for securing smart grid, and the proposed schemes are secure. Moreover, simulation results demonstrate that the proposed schemes require low overhead.