Jonghoon Kwon

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Malware landscape has been dramatically elevated over the last decade. The main reason of the increase is that new malware variants can be produced easily using simple code obfuscation techniques. Once the obfuscation is applied, the malware can change their syntactics while preserving semantics, and bypass anti-virus (AV) scanners. Malware authors, thus,(More)
Internet attacks often use IP spoofing to forge the source IP address of packets, and thereby hide the identity of the source. It causes many serious security problems such as the difficulty of packet authenticity and IP traceback. While many IP spoofing prevention techniques have been proposed apart from ingress filtering, none have achieved widespread(More)
A particular type of spyware which uses the user’s events covertly, such as keyloggers and password stealers, has become a big threat to Internet users. Due to the prevalence of spywares, the user’s private information can easily be exposed to an attacker. Conventional anti-spyware programs have used signatures to defend against spywares. Unfortunately,(More)
Mobile malware has been recently recognized as a significant problem in accordance with the rapid growth of the market share for smartphones. Despite of the numerous efforts to thwart the growth of mobile malware, the number of mobile malware is getting increased by evolving themselves. By applying, for example, code obfuscation or junk code insertion,(More)
Software vulnerability has long been considered an important threat to the system safety. A vulnerability is often reproduced because of the frequent code reuse by programmers. Security patches are usually not propagated to all code clones; however, they could be leveraged to discover unknown vulnerabilities. Static code auditing approaches are frequently(More)
Botnets are widely used for acquiring economic profits, by launching attacks such as distributed denial-of-service (DDoS), identification theft, ad-ware installation, mass spamming, and click frauds. Many approaches have been proposed to detect botnet, which rely on end-host installations or operate on network traffic with deep packet inspection. They have(More)
The number of malicious applications, sometimes known as malapps, in Android smartphones has increased significantly in recent years. Malapp writers abuse repackaging techniques to rebuild applications with code changes. Existing anti-malware applications do not successfully defeat or defend against the repackaged malapps due to numerous variants.(More)
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