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2. Cloud computing - Wikipedia

   en.wikipedia.org/wiki/Cloud_computing

   A European Commission communication issued in 2012 argued that the breadth of scope offered by cloud computing made a general definition "elusive", [5] whereas the United States National Institute of Standards and Technology's 2011 definition of cloud computing identified "five essential characteristics":

3. Operating system - Wikipedia

   en.wikipedia.org/wiki/Operating_system

   Security descriptor for a file that is read-only by default, specified no access for Elvis, read/write access for Cathy, and full access for Ida, the owner of the file [142] Windows is a proprietary operating system that is widely used on desktop computers, laptops, tablets, phones, workstations , enterprise servers , and Xbox consoles. [ 143 ]

4. Computer security - Wikipedia

   en.wikipedia.org/wiki/Computer_security

   An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that may result in unauthorized information disclosure, theft of (or damage to) hardware, software, or ...

5. Backdoor (computing) - Wikipedia

   en.wikipedia.org/wiki/Backdoor_(computing)

   A backdoor is a typically covert method of bypassing normal authentication or encryption in a computer, product, embedded device (e.g. a home router), or its embodiment (e.g. part of a cryptosystem, algorithm, chipset, or even a "homunculus computer"—a tiny computer-within-a-computer such as that found in Intel's AMT technology).

6. Find and remove unusual activity on your AOL account

   help.aol.com/articles/find-and-remove-unusual...

   Depending on how you access your account, there can be up to 3 sections. If you see something you don't recognize, click Sign out or Remove next to it, then immediately change your password. • Recent activity - Devices or browsers that recently signed in. • Apps connected to your account - Apps you've given permission to access your info.

7. Exploit (computer security) - Wikipedia

   en.wikipedia.org/wiki/Exploit_(computer_security)

   A remote exploit works over a network and exploits the security vulnerability without any prior access to the vulnerable system. A local exploit requires prior access or physical access to the vulnerable system, and usually increases the privileges of the person running the exploit past those granted by the system administrator. Exploits ...