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  2. Challenge–response authentication - Wikipedia

    en.wikipedia.org/wiki/Challenge–response...

    TRIAD includes a list of three-letter challenge codes, which the verifier is supposed to choose randomly from, and random three-letter responses to them. For added security, each set of codes is only valid for a particular time period which is ordinarily 24 hours. Another basic challenge-response technique works as follows.

  3. Heartbleed - Wikipedia

    en.wikipedia.org/wiki/Heartbleed

    Heartbleed is a security bug in some outdated versions of the OpenSSL cryptography library, which is a widely used implementation of the Transport Layer Security (TLS) protocol. It was introduced into the software in 2012 and publicly disclosed in April 2014.

  4. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    The cache was unable to validate the response, due to an inability to reach the origin server. 112 Disconnected Operation The cache is intentionally disconnected from the rest of the network. 113 Heuristic Expiration The cache heuristically chose a freshness lifetime greater than 24 hours and the response's age is greater than 24 hours.

  5. 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.

  6. Verification and validation - Wikipedia

    en.wikipedia.org/wiki/Verification_and_validation

    Verification is intended to check that a product, service, or system meets a set of design specifications. [6] [7] In the development phase, verification procedures involve performing special tests to model or simulate a portion, or the entirety, of a product, service, or system, then performing a review or analysis of the modeling results.

  7. Cross-site request forgery - Wikipedia

    en.wikipedia.org/wiki/Cross-site_request_forgery

    Cross-site request forgery, also known as one-click attack or session riding and abbreviated as CSRF (sometimes pronounced sea-surf [1]) or XSRF, is a type of malicious exploit of a website or web application where unauthorized commands are submitted from a user that the web application trusts. [2]

  8. Improper input validation - Wikipedia

    en.wikipedia.org/wiki/Improper_input_validation

    Improper input validation [1] or unchecked user input is a type of vulnerability in computer software that may be used for security exploits. [2] This vulnerability is caused when "[t]he product does not validate or incorrectly validates input that can affect the control flow or data flow of a program." [1] Examples include: Buffer overflow

  9. Application security - Wikipedia

    en.wikipedia.org/wiki/Application_security

    This is a security engineer deeply understanding the application through manually reviewing the source code and noticing security flaws. Through comprehension of the application, vulnerabilities unique to the application can be found. Blackbox security audit. This is only through the use of an application testing it for security vulnerabilities ...