The trojan horse itself is NOT self-propagating, but it will put a ton of hooks around the system to re-download/re-deploy itself if it gets shut off. ![]() This is frequently done via IRC, but newer programs have become far more sophisticated using P2P protocols of their own design or hiding it as fake HTTP requests making traffic analysis more difficult. Trojan-horse = program which gives a malicious user control over a system remotely. In general, the virus itself is not very useful, but frequently they're used as a piggy-back which downloads a. For example: a virus would enter a system as an infected word document, which would add macros into your copy of word infecting all of the word documents you edit after becoming infected. Requires some legitimate program which it exploits and modifies saved data to maintain itself. Virus = self-propagating, but does not run on its own. Woo pedantic! Here are the given definitions, as I understand them: If they do, OS X alerts you, then warns you the first time you open one. That’s why files you download using Safari, Mail, and iChat are screened to determine if they contain applications. Innocent-looking files downloaded over the Internet may contain dangerous malware in disguise. Other automatic security features include Library Randomization, which prevents malicious commands from finding their targets, and Execute Disable, which protects the memory in your Mac from attacks. It can also encrypt any removable drive, helping you secure Time Machine backups or other external drives with ease. Initial encryption is fast and unobtrusive. FileVault 2 encrypts the entire drive on your Mac, protecting your data with XTS-AESW 128 encryption. With FileVault 2, your data is safe and secure - even if it falls into the wrong hands. For example, it thwarts hackers through a technique called “sandboxing” - restricting what actions programs can perform on your Mac, what files they can access, and what other programs they can launch. With virtually no effort on your part, OS X defends against viruses and other malicious applications, or malware.
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