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  2. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  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. Cryptocurrency - Wikipedia

    en.wikipedia.org/wiki/Cryptocurrency

    The verification algorithm requires a lot of processing power, and thus electricity, in order to make verification costly enough to accurately validate the public blockchain. Not only do miners have to factor in the costs associated with expensive equipment necessary to stand a chance of solving a hash problem, they must further consider the ...

  5. 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. In ...

  6. Cryptographically secure pseudorandom number generator

    en.wikipedia.org/wiki/Cryptographically_secure...

    That is, given the first k bits of a random sequence, there is no polynomial-time algorithm that can predict the (k+1)th bit with probability of success non-negligibly better than 50%. [1] Andrew Yao proved in 1982 that a generator passing the next-bit test will pass all other polynomial-time statistical tests for randomness.

  7. Non-fungible token - Wikipedia

    en.wikipedia.org/wiki/Non-fungible_token

    The first known "NFT", Quantum, [24] was created by Kevin McCoy and Anil Dash in May 2014. It consists of a video clip made by McCoy's wife, Jennifer. McCoy registered the video on the Namecoin blockchain and sold it to Dash for $4, during a live presentation for the Seven on Seven conferences at the New Museum in New York City.

  8. Single-photon emission computed tomography - Wikipedia

    en.wikipedia.org/wiki/Single-photon_emission...

    SPECT image (bone tracer) of a mouse MIP Collimator used to collimate gamma rays (red arrows) in a gamma camera. Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. [1]

  9. Trust, but verify - Wikipedia

    en.wikipedia.org/wiki/Trust,_but_verify

    In 1995, the similar phrase "Trust and Verify" was used as the motto of the On-Site Inspection Agency (now subsumed into the Defense Threat Reduction Agency). [11]In 2000, David T. Lindgren's book about how interpretation, or imagery analysis, of aerial and satellite images of the Soviet Union played a key role in superpowers and in arms control during the Cold War was titled Trust But Verify ...