An efficient attribute-based encryption algorithm is proposed to solve the problem that it is inefficient to encrypt and transmit sensitive message in ad hoc networks. The use of the access control policy that only allows users with the attributes above one threshold to decrypt message results in group decryption. The discrete Fourier transform is used to share secret key
such that the shares of the secret key are issued to users over open channel; Users use the inverse discrete Fourier transform to recover the secret key
such that decryption has a fault tolerance and the time complexity of decryption is reduced. Experimental results show that the proposed algorithm not only reduces the energy consumption of the node in ad hoc networks
but also has an ignorable delay in transmitting message
thus it is suitable for application to ad hoc networks.
关键词
Keywords
references
SHAMIR A. Identity-based cryptosystems and signature schemes[C]∥Proceedings of the 4th Annual International Cryptology Conference on Advances in Cryptology. Berlin, Germany: Springer-Verlag, 1985: 47-53.
SAHAI A, WATERS B R. Fuzzy identity-based encryption [C]∥Proceedings of the 24th Annual International Conference on the Theory and Applications of Cryptographic Techniques. Berlin, Germany: Springer, 2005: 457-471.
GOYAL V, PANDEY O, SAHAI A, et al. Attribute-based encryption for fine-grained access control of encrypted data[C]∥Proceedings of the 13th ACM Conference on Computer and Communications Security. New York, NY, USA: ACM, 2006: 89-98.
TANG Qiang, JI Dongyao. Multi-authority verifiable attribute-based encryption[J]. Journal of Wuhan University, 2008, 54(5): 607-610.
CHEUNG L, NEWPORT C. Provably secure ciphertext policy ABE [C]∥Proceedings of the 14th ACM Conference on Computer and Communications Security. New York, NY, USA: ACM, 2007: 456-465.
CHASE M. Multi-authority attribute based encryption [C]∥Proceedings of the 4th Conference on Theory of Cryptography. Berlin, Germany: Springer-Verlag, 2007: 515-534.
CHASE M, CHOW S S M. Improving privacy and security in multi-authority attribute-based encryption [C]∥Proceedings of the 16th ACM Conference on Computer and Communications Security. New York, NY, USA: ACM, 2009: 121-130.
MACKER J, LEE R. The NRL OLSR routing protocol implementation [EB/OL].(2007-01-08)[2012-11-08]. http:∥cs.itd.nrl.navy.mil/work/olsr/.