SQLIA is adopted to attack websites with and without confidential information.Hackers utilize the compromised website as intermediate proxy to attack others for avoiding being committed of cyber-criminal and also enlarging the scale of Distributed Denial of Service Attack (DDoS). The DDoS is that hackers maliciously turn down a website and make network resources unavailable to web users. It is extremely difficult to effectively detect and prevent SQLIA because hackers adopt various evading SQLIA Intrusion Detection System techniques. Victims always are not aware of that their confidential information has been compromised for a long time.The contributions of this thesis are: (1) systematically explore SQLIA, SQLIA prevention in theory; (2)
Most Intrusion Detection Systems (IDS) / Intrusion Prevention Systems (IPS) cannot defend the attacks from a Return Oriented Program (ROP) which applies code reusing and exploiting techniques without the need for code injection. Malicious attackers chain a short sequence as a gadget and execute this gadget as an arbitrary (Turing-complete) behavior in the target program. Lots of ROP defense tools have been developed with satisfactory performance and low costs overhead, but malicious attackers can evade ROP tools. Therefore, it needs security researchers to continually improve existing ROP defense tools, because the defense ability of target devices, such as smartphones is weak, and such devices are being increasingly targeted. Our contribution in this paper is to propose an ROP defense method that has provided a better performance of defense against ROP attacks than existing ROP defense tools.
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