Network Security

Network Security

1. passwords

   • a secret word or phrase that must be used to gain admission to a place.
   • Every time Americans tune into the Nightly News and hear about the latest cyber-attack, it sends millions of us to our computers to check and change our passwords.
   • Passwords are easily hacked because most humans follow similar patterns
   • These five user passwords accounted for 3.2 million of the 130 million accounts that were stolen in the Adobe hack of 2013: “123456,” “12345678,” “Password,” “Adobe123” and “12345678.”
   • An analysis of 11 million stolen passwords for cloud services conducted by Skyhigh Networks found that just 20 passwords constitute 10.3% of all passwords in use.

2. antivirus

   • (of software) designed to detect and destroy computer viruses.
   • Antivirus software, if properly installed on a computer system, can prevent access to computer systems by unwanted computer programs.
   • Antivirus or anti-virus software, sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software.
   • In the very early days of antivirus technology – around the late ‘80s to early ‘90s – antivirus solutions were designed to detect known malware.
   • The more basic, reactive, approach to malware detection consists of using a hash or fingerprint of an infected file.
   • A more advanced, proactive, approach to virus detection is commonly referred to as heuristics.

3. firewall

   • protect (a network or system) from unauthorized access with a firewall.
   • A Firewall is a system that prevents unauthorized access to a private network.
   • Firewalls are extensively used by businesses, corporations and the government to protect against potential hackers.
   • They act as a barrier between a private network and the Internet.
   • You can choose between software and hardware firewalls or choose to install both for added security.

4. encrytion

   • the process of converting information or data into a code, especially to prevent unauthorized access.
   • Encryption is the intentional scrambling or masking of digital data to protect it from compromise.
   • DES utilized symmetric-key (or private-key) encryption, in which the sender and receiver of a message share a single, common key that is used to encrypt and decrypt the message.
   • Data encryption refers to the process of transforming electronic information into a scrambled form that can only be read by someone who knows how to translate the code.
   • Encryption was already used by Julius Caesar in the days of the Roman Empire to scramble letters and messages.