Elliptic curve cryptosystems, proposed by Koblitz([8]) and Miller([11]), can be constructed over a smaller definition field than the ElGamal cryptosystems([5]) or the RSA cryptosys...
The need for delegating information arises when the data owner wants to have her data handled by an external party. If the external party is untrusted and data are confidential, d...
Josep Domingo-Ferrer, Ricardo X. Sanchez del Casti...