This article presents a survey of the state of art of the mechanisms to provide security to the Wireless Sensor Networks. Over the principal schemes, are the key management and cryptography, the authentication protocols and the mechanisms of clone or intrusion detection.

No abstract

Abstract:With the increasing use of information technology in colleges and universities, especially the use of campus credit cards, the importance of data processing and production of information systems has gradually increased. The data center in colleges and universities needs a reliable protection, and can quickly restore its ability to work in the event of a disaster. The paper introduces several important disaster recovery tools, including data-level disaster recovery, application-level disaster recovery, and active-active data centers.