Computer Science

 What are passwords? A password, sometimes called a passcode, is a memorized secret, typically a string of characters, used to confirm the identity of a user. Qualities of a good password. At least 8 characters—the more characters, the better. A mixture of both uppercase and lowercase letters. A mixture of letters and numbers. Inclusion of at least one special character, e.g.,! @ # ? ] Note: do not use < or > in your  password , as both can cause problems in Web browsers. examples. EZr@3214 or boY!S455 Disadvantages of passwords. Brute Force Attacks and Complexity. You typically can't guess a  password  unless you know something about the user of that  password , and then only if the  password  represents something knowable about that user. ... Storage and Encryption.  Secrecy and Public Use.  User Engagement. Biometrics . In computer security, biometrics refers to authentication techn...

Security Threats. Hacking and Cracking  both is technical term, where “ Hacking  is The process of attempting to gain or successfully gaining, unauthorized access to computer resource.” Whereas “ Cracking  is the act of breaking into a computer system, often on a network maliciously, for personal gain.” A  computer virus   is a malicious software program loaded onto a user's   computer   without the user's knowledge and performs malicious actions. ... It can self-replicate, inserting itself onto other programs or files, infecting them in the process. Not all   computer viruses   are destructive though. Phishing  involves getting a user to enter personal information via a fake website. Pharming  involves modifying DNS entries, which causes users to be directed to the wrong website when they visit a certain Web address. Spyware  is unwanted software that infiltrates your computing device, stealing your internet u...