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  2. Heartbleed - Wikipedia

    en.wikipedia.org/wiki/Heartbleed

    It's not just a server-side vulnerability, it's also a client-side vulnerability because the server, or whomever you connect to, is as able to ask you for a heartbeat back as you are to ask them. [82] The stolen data could contain usernames and passwords. [83] Reverse Heartbleed affected millions of application instances. [81]

  3. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  4. Entity–attribute–value model - Wikipedia

    en.wikipedia.org/wiki/Entity–attribute–value...

    Validation metadata include data type, range of permissible values or membership in a set of values, regular expression match, default value, and whether the value is permitted to be null. In EAV systems representing classes with substructure, the validation metadata will also record what class, if any, a given attribute belongs to.

  5. HTTP cookie - Wikipedia

    en.wikipedia.org/wiki/HTTP_cookie

    HTTP cookies share their name with a popular baked treat.. The term cookie was coined by web-browser programmer Lou Montulli.It was derived from the term magic cookie, which is a packet of data a program receives and sends back unchanged, used by Unix programmers.