Jorge Blasco Alís

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The rapid proliferation of smartphones over the last few years has come hand in hand with and impressive growth in the number and sophistication of malicious apps targetting smartphone users. The availability of reuse-oriented development methodologies and automated malware production tools makes exceedingly easy to produce new specimens. As a result,(More)
Deduplication is a widely used technique in storage services, since it affords a very efficient usage of resources-being especially effective for consumer-grade storage services (e.g. Dropbox). Deduplication has been shown to suffer from several security weaknesses, the most severe ones enabling a malicious user to obtain possession of a file it is not(More)
The cross-site scripting (XSS) has become a common vulnerability of many web sites and web applications. XSS consists in the exploitation of input validation flaws, with the purpose of injecting arbitrary script code which is later executed at the web browser of the victim. One interesting possibility to prevent this type of vulnerability is the use of(More)
One of the central areas in network intrusion detection is how to build effective systems that are able to distinguish normal from intrusive traffic. In this paper we explore the use of Genetic Programming (GP) for such a purpose. Although GP has already been studied for this task, the inner features of network intrusion detection have been systematically(More)
The widespread adoption of autonomous intrusion detection technology is overwhelming current frameworks for network security management. Modern intrusion detection systems (IDSs) and intelligent agents are the most mentioned in literature and news, although other risks such as broad attacks (e.g. very widely spread in a distributed fashion like botnets),(More)
Insider threats are an increasing concern for most modern organizations. Information leakage is one of the most important insider threats, particularly according to its potential financial impact. Data Leakage Protection (DLP) systems have been developed to tackle this issue and they constitute the main solution to protect information systems against leaks.(More)
Network Intrusion Detection Systems (NIDS) play a fundamental role on security policy deployment and help organizations in protecting their assets from network attacks. Signature-based NIDS rely on a set of known patterns to match malicious traffic. Accordingly, they are unable to detect a specific attack until a specific signature for the corresponding(More)
Data theft is a major threat for modern organizations with potentially large economic consequences. Although these attacks may well originate outside an organization’s information systems, the attacker—or else an insider—must eventually make contact with the system where the information resides and extract it. In this work, we propose a scheme that hinders(More)
Steganographic techniques allow users to covertly transmit information, hiding the existence of the communication itself. These can be used in several scenarios ranging from evading censorship to discreetly extracting sensitive information from an organization. In this paper, we consider the problem of using steganography through a widely used network(More)