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Cyber Security for Business

• A vulnerability is a weakness in design, implementation, operation, or internal control. An exploitable vulnerability is one for which at least one working attack or “exploit” exists. Vulnerabilities can be researched, reverse-engineered, hunted, or exploited using automated tools or customized scripts. To secure a computer system, it is important to understand the attacks that can be made against it. Like an example a backdoor in a computer system, a cryptosystem or an algorithm, is any secret method of bypassing normal authentication or security controls.

• Denial of service attacks (DoS) are designed to make a machine or network resource unavailable to its intended users. Attackers can deny service to individual victims, such as by deliberately entering a wrong password enough consecutive times to cause the victim’s account to be locked, or they may overload the capabilities of a machine or network and block all users at once.

• An unauthorized user gaining physical access to a computer is most likely able to directly copy data from it. They may also compromise security by making operating system modifications, installing software worms, keyloggers, covert listening devices or using wireless mice. Even when the system is protected by standard security measures, these may be able to be by-passed by booting another operating system or tool from a CD-ROM or other bootable media. Disk encryption and Trusted Platform Module are designed to prevent these attacks.

• Phishing is the attempt to acquire sensitive information such as usernames, passwords, and credit card details directly from users by deceiving the users. Phishing is typically carried out by email spoofing or instant messaging, and it often directs users to enter details at a fake website whose “look” and “feel” are almost identical to the legitimate one.