1,721,065 research outputs found
Green-Aware Security: Towards a new Research Field
No full textGreen Security is a new research field aimed at defining and investigating security solutions under an energy-aware perspective. The aim of Green Security is twofold: 1) evaluating the actual security mechanisms both considering the energy costs and the effectiveness; 2) building new security mechanisms by considering energy efficiency from the design phase. In this paper, we first provide a definition of Green-Aware Security and an early manifest. Thus, we investigate some formalism to model Green-Aware Security issues, then we provide a use case showing how it is possible to model the energy consumption of two Intrusion Detection System (IDS) strategies, then we leverage this model to assess the energy leakage due to the late discovery of bad packets. Finally, we discuss an introductory assessment of the energy costs related to security on mobile device, which is a promising research trend for Green-Aware Security
On the Feasibility of Moderating a Peer-To-Peer CDN System: A Proof-of-Concept Implementation
No full textContent Delivery Network (CDN) Systems share many similarities with On-line Markets (OM), since they both provide a way to acquire something (be it information or a physical good) whose quality needs to be certified in order to provide consumer protection. In most common implementations the quality is guaranteed by a central node that provides moderation but also constitutes a bottleneck, a single point of failure and requires a significant amount of dedicated resources (both in hardware and in staffing). In this paper, we study the feasibility of a fully distributed, peer-To-peer based CDN system capable at the same time to provide quality guarantees about the content through well-defined, authenticated and enforced roles. We describe how to build such a structure leveraging bit-coin block-chains, cryptographic accumulators and the bit-Torrent network, we describe a use case of such a structure to prove its usefulness, and finally we provide a proof-of-concept implementation. © 2015 IEEE
Completely Automated Public Physical test to tell Computers and Humans Apart: A usability study on mobile devices
Full text linkA very common approach adopted to fight the increasing sophistication and dangerousness of malware and hacking is to introduce more complex authentication mechanisms. This approach, however, introduces additional cognitive burdens for users and lowers the whole authentication mechanism acceptability to the point of making it unusable. On the contrary, what is really needed to fight the onslaught of automated attacks to users data and privacy is to first tell human and computers apart and then distinguish among humans to guarantee correct authentication. Such an approach is capable of completely thwarting any automated attempt to achieve unwarranted access while it allows keeping simple the mechanism dedicated to recognizing the legitimate user. This kind of approach is behind the concept of Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA), yet CAPTCHA leverages cognitive capabilities, thus the increasing sophistication of computers calls for more and more difficult cognitive tasks that make them either very long to solve or very prone to false negatives. We argue that this problem can be overcome by substituting the cognitive component of CAPTCHA with a different property that programs cannot mimic: the physical nature. In past work we have introduced the Completely Automated Public Physical test to tell Computer and Humans Apart (CAPPCHA) as a way to enhance the PIN authentication method for mobile devices and we have provided a proof of concept implementation. Similarly to CAPTCHA, this mechanism can also be used to prevent automated programs from abusing online services. However, to evaluate the real efficacy of the proposed scheme, an extended empirical assessment of CAPPCHA is required as well as a comparison of CAPPCHA performance with the existing state of the art. To this aim, in this paper we carry out an extensive experimental study on both the performance and the usability of CAPPCHA involving a high number of physical users, and we provide comparisons of CAPPCHA with existing flavors of CAPTCHA
What is Green Security?2011 7th International Conference on Information Assurance and Security (IAS)
No full textGreen Security is a new research field defining and investigating security solutions under an energy-aware perspective. Green Security aims at: (1) evaluating the actual security mechanisms in order to assess their energy consumption; (2) building new security mechanisms by considering energy costs from the design phase. In this paper, we first provide a definition of Green Security and formalism to model it, then we provide a use case showing how it is possible to model the energy consumption of two Intrusion Detection System (IDS) strategies, finally we leverage this model to assess the energy leakage due to the late discovery of bad packets
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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