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  2. Heath Robinson (codebreaking machine) - Wikipedia

    en.wikipedia.org/wiki/Heath_Robinson_(code...

    The basis of the method that the Heath Robinson machine implemented was Bill Tutte's "1+2 technique". [10] This involved examining the first two of the five impulses [11] of the characters of the message on the ciphertext tape and combining them with the first two impulses of part of the key as generated by the wheels of the Lorenz machine.

  3. List of copy protection schemes - Wikipedia

    en.wikipedia.org/wiki/List_of_copy_protection...

    Serial Copy Management System Records in the sub code data bits that expresses whether the media is copy allowed(00), copy once(10) or copy prohibited(11). Traitor Tracing Rather than directly preventing copying, embeds user information into files so if they are uploaded, the copyright holder could find out exactly who uploaded the file.

  4. List of North Korean websites banned in South Korea

    en.wikipedia.org/wiki/List_of_North_Korean...

    Internet Archive's Wayback Machine and web caches of search engines are not blocked and include copies of North Korean websites. [6] In 2005, up to 3,167 webpages unrelated to North Korea were found to be blocked due to blocking IPs at the router level. [5] DNS tampering that prevents domain names to be resolved into correct IPs is also used. [7]

  5. Printer tracking dots - Wikipedia

    en.wikipedia.org/wiki/Printer_tracking_dots

    Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...

  6. List of Compact Disc and DVD copy protection schemes

    en.wikipedia.org/wiki/List_of_Compact_Disc_and...

    Requires the user to enter CD-code (or reads embedded CD-code) that describes geometry of CD to correctly locate data on the disc. SafeDisc (versions 1–5) Adds unique digital signature at the time of manufacturing which is designed to be difficult to copy or transfer so that software is able to detect copied media. SafeCast

  7. Hardware-in-the-loop simulation - Wikipedia

    en.wikipedia.org/wiki/Hardware-in-the-loop...

    Hardware-in-the-loop (HIL) simulation, also known by various acronyms such as HiL, HITL, and HWIL, is a technique that is used in the development and testing of complex real-time embedded systems. HIL simulation provides an effective testing platform by adding the complexity of the process-actuator system, known as a plant, to the

  8. Copy testing - Wikipedia

    en.wikipedia.org/wiki/Copy_testing

    Copy testing is a specialized field of marketing research, that determines an advertisement's effectiveness based on consumer responses, feedback, and behavior. Also known as pre-testing, it might address all media channels including television, print, radio, outdoor signage, internet , and social media .

  9. X-Machine Testing - Wikipedia

    en.wikipedia.org/wiki/X-Machine_Testing

    The (Stream) X-Machine Testing Method assumes that both the design and the implementation can be considered as (a collection of) Stream X-Machines. For each pair of corresponding machines ( Spec , Imp ), the purpose of testing is to determine whether the behaviour of Imp , the machine of the implementation, exactly matches the behaviour of Spec ...