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Authentication of smartphone users is important because a lot of sensitive data is stored in the smartphone and the smartphone is also used to access various cloud data and services. However, smartphones are easily stolen or co-opted by an attacker. Beyond the initial login, it is highly desirable to re-authenticate end-users who are continuing to access security-critical services and data. Hence,...
Authentication of smartphone users is important because a lot of sensitive data is stored in the smartphone and the smartphone is also used to access various cloud data and services. However, smartphones are easily stolen or co-opted by an attacker. Beyond the initial login, it is highly desirable to re-authenticate end-users who are continuing to access security-critical services and data. Hence,...
The widespread use of smartphones gives rise to new security and privacy concerns. Smartphone thefts account for the largest percentage of thefts in recent crime statistics. Using a victim's smartphone, the attacker can launch impersonation attacks, which threaten the security of the victim and other users in the network. Our threat model includes the attacker taking over the phone after the user...
In 2012, Guo and Chang proposed a chaotic maps-based password-authenticated key agreement scheme. Their scheme uses smart cards and Chebyshev chaotic maps to enhance the security. After analyzing Guo and Chang's protocol, we find that their scheme does not provide forward secrecy and integrity is absent in password change phase. In this paper, details of the found flaws and some further suggestions...
This article puts forward a method to access the data and analyzed results from the monitoring system of environment based on WSN with the B/S mode. It resolves the problem of low speed of page refresh with Ajax. The experiment shows that the partial refresh feature of Ajax can make it possible for the users to get access to the data and analyzed results easily through the browser, and experience...
A security robot simulator can be a useful tool for planning security strategies. However, few simulators or systems for security robot planning have been designed to date. This involves the implementation of low-level procedures to control robot behavior, action and motion and high-level procedures such as patrol path planning. In this paper, we propose a new security robot simulation system, Security...
Receipt-freeness is an essential security property in electronic voting to prevent vote buying or coercion. In this paper, we propose a new approach to construct receipt-free electronic voting schemes. We first introduce the notion of linkable ring signature for designated verifiers which preserves all properties of a normal linkable ring signature while only the designated verifiers can verify the...
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