In the study of fixed points of an operator it is useful to consider a more general concept, namely coupled fixed point. Edit In this paper, by using notion partial metric, we introduce a metric space $S$-Hausdorff on the set of all close and bounded subset of $X$. Then the fixed point results of multivalued continuous and surjective mappings are presented. Furthermore, we give a positive resul...

Authentication is the most important issue to control the home networks remotely. In this paper, a strong authentication and key agreement method for a smart home network system is presented. The proposed scheme uses a smart card which stores private information and performs cryptic operations. It also uses a modified 3GPP security system that is suitable for the home network. Our scheme provid...

Abstract : The cryptographic strength of an SP network depends crucially on the strength of its substitution boxes (S-boxes). In this paper we use the concept of information leakage to evaluate the strength of Sboxes and SP networks. We define a n equivalence class on n x n S-boxes that is invariant in information leakage. Simulation results for a 16x 16 SP network suggest that after a sufficie...

The U. S. Naval Research Laboratory's OPIE (Onetime Passwords In Everything) Software Distribution is an enhancement of Bellcore's S/Key 1.0 package. OPIE improves on S/Key in several areas, including FTP service with one-time passwords, and a stronger algorithm for generating one-time passwords. OPIE diverges from S/Key in select design decisions and in the behavior of certain programs. While ...

Genetic programming is an evolutionary optimization method that produces functional programs to solve a given task. These programs commonly take the form of trees representing LISP s-expressions, and a typical evolutionary run produces a great many of these trees. For this reason, a good tree-generation algorithm is very important to genetic programming. This paper presents two new tree-generat...