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  2. Telephone keypad - Wikipedia

    en.wikipedia.org/wiki/Telephone_keypad

    These two keys are commonly labelled star, , and number sign/hash, #, respectively, and produce the signals associated with those symbols. These keys were added to provide signals for anticipated data entry purposes in business applications, but found use in Custom Calling Services (CLASS) features installed in electronic switching systems .

  3. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    Although the number of possible substitution alphabets is very large (26! ≈ 2 88.4, or about 88 bits), this cipher is not very strong, and is easily broken. Provided the message is of reasonable length (see below), the cryptanalyst can deduce the probable meaning of the most common symbols by analyzing the frequency distribution of the ...

  4. Fill device - Wikipedia

    en.wikipedia.org/wiki/Fill_device

    Secure DTD2000 System (SDS) - Named KIK-20, this was the next generation common fill device replacement for the DTD when it started production in 2006. It employs the Windows CE operating system. [5] KSD-64 Crypto ignition key (CIK) The older KYK-13, [6] KYX-15 and MX-10579 are limited to certain key types.

  5. Key management - Wikipedia

    en.wikipedia.org/wiki/Key_management

    A key management system (KMS), also known as a cryptographic key management system (CKMS) or enterprise key management system (EKMS), is an integrated approach for generating, distributing and managing cryptographic keys for devices and applications. They may cover all aspects of security - from the secure generation of keys over the secure ...

  6. YubiKey - Wikipedia

    en.wikipedia.org/wiki/YubiKey

    First YubiKey USB token of the FIDO standard in 2014. The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols [1] developed by the FIDO Alliance.

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