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  2. What do the numbers on your credit card mean? - AOL

    www.aol.com/finance/numbers-credit-card-mean...

    Key takeaways. The numbers on a credit card help identify the credit card network, the company that issued the card and the cardholder. Credit card numbers are either 15 or 16 digits, with each ...

  3. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to digital data. [1][2] Blocks of data entering these systems get a short check value attached, based on the remainder of a polynomial division of their contents. On retrieval, the calculation is repeated ...

  4. Glossary of cryptographic keys - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_cryptographic_keys

    FIREFLY key - (NSA) keys used in an NSA system based on public key cryptography. key encryption key (KEK) - key used to protect MEK keys (or DEK/TEK if MEK is not used). key production key (KPK) -Key used to initialize a keystream generator for the production of other electronically generated keys.

  5. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    It alerts the client to wait for a final response. The message consists only of the status line and optional header fields, and is terminated by an empty line. As the HTTP/1.0 standard did not define any 1xx status codes, servers must not [note 1] send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions. 100 Continue

  6. Should You Use an Expired COVID Test? The Answer Might ... - AOL

    www.aol.com/lifestyle/expired-covid-tests-still...

    [table-of-contents] stripped COVID-19 has been a part of life for nearly four years now and, with new variants like EG.5, or “Eris,” and BA.2.86, or “Pirola” popping up, it shows no signs ...

  7. Cookie Run: Kingdom - Wikipedia

    en.wikipedia.org/wiki/Cookie_Run:_Kingdom

    Single-player, Multiplayer. Cookie Run: Kingdom is an action role-playing gacha game by Devsisters and the sixth game in the Cookie Run series. It was announced on November 28, 2020 and released worldwide on January 19, 2021 on Android and iOS. On July 12, 2023, it was released on Google Play Games on PC. The game features a huge cast of new ...

  8. How Long Are Checks Good for: Do Checks Expire? - AOL

    www.aol.com/long-checks-good-checks-expire...

    Payroll, business, and personal checks all have a life expectancy of 180 days, or six months, from the date written on the check. After six months the check technically becomes “stale-dated ...

  9. Certificate revocation list - Wikipedia

    en.wikipedia.org/wiki/Certificate_revocation_list

    In cryptography, a certificate revocation list (CRL) is "a list of digital certificates that have been revoked by the issuing certificate authority (CA) before their scheduled expiration date and should no longer be trusted". [1]