1-2hit |
Yoonjeong KIM SeongYong OHM Kang YI
In this letter, we propose a privacy-preserving authentication protocol with RSA cryptosystem in an RFID environment. For both overcoming the resource restriction and strengthening security, our protocol uses only modular exponentiation with exponent three at RFID tag side, with the padded random message whose length is greater than one-sixth of the whole message length.
In 1996, Chiu and Hsu proposed a multi-role-based access control (MRBAC) policy. Nevertheless, the Chiu-Hsu scheme can be further enforced by role list, union, and intersection (i. e. containment) to deal with the problems regarding the MRBAC and the object role with different security ranks. The author presents an improvement of the Chiu-Hsu scheme using more detailed list structure. This improvement offers some significant advantages.