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  2. Killian documents authenticity issues - Wikipedia

    en.wikipedia.org/wiki/Killian_documents...

    During the Killian documents controversy in 2004, the authenticity of the documents themselves was disputed by a variety of individuals and groups. Proof of authenticity is not possible without original documents, and since CBS used only faxed and photocopied duplicates, authentication to professional standards would be impossible regardless of the provenance of the originals.

  3. Ascon (cipher) - Wikipedia

    en.wikipedia.org/wiki/Ascon_(cipher)

    All algorithms support authenticated encryption with plaintext P and additional authenticated data A (that remains unencrypted). The encryption input also includes a public nonce N, the output - authentication tag T, size of the ciphertext C is the same as that of P.

  4. Security paper - Wikipedia

    en.wikipedia.org/wiki/Security_paper

    Barack Obama's birth certificate on security paper.. Security paper is a paper used in security printing that incorporates features that can be used to identify or authenticate a document as original, e.g., watermarks or invisible fibres in paper, or features that demonstrate tamper evidence when fraud is attempted, e.g., to remove or alter print such as amounts or signatures on a cheque.

  5. American Invitational Mathematics Examination - Wikipedia

    en.wikipedia.org/wiki/American_Invitational...

    The American Invitational Mathematics Examination (AIME) is a selective and prestigious 15-question 3-hour test given since 1983 to those who rank in the top 5% on the AMC 12 high school mathematics examination (formerly known as the AHSME), and starting in 2010, those who rank in the top 2.5% on the AMC 10. Two different versions of the test ...

  6. Certified copy - Wikipedia

    en.wikipedia.org/wiki/Certified_copy

    Exemplified certified copy of Decree Absolute issued by the Family Court Deputy District Judge – divorce certificate. A certified copy is a copy (often a photocopy) of a primary document that has on it an endorsement or certificate that it is a true copy of the primary document. It does not certify that the primary document is genuine, only ...

  7. Past paper - Wikipedia

    en.wikipedia.org/wiki/Past_paper

    A past paper is an examination paper from a previous year or previous years, usually used either for exam practice or for tests such as University of Oxford, [1] [2] University of Cambridge [3] College Collections. Exam candidates find past papers valuable in test preparation.

  8. Authenticated encryption - Wikipedia

    en.wikipedia.org/wiki/Authenticated_encryption

    Authenticated Encryption (AE) is an encryption scheme which simultaneously assures the data confidentiality (also known as privacy: the encrypted message is impossible to understand without the knowledge of a secret key [1]) and authenticity (in other words, it is unforgeable: [2] the encrypted message includes an authentication tag that the sender can calculate only while possessing the ...

  9. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    [3] Formally, a message authentication code (MAC) system is a triple of efficient [4] algorithms (G, S, V) satisfying: G (key-generator) gives the key k on input 1 n, where n is the security parameter. S (signing) outputs a tag t on the key k and the input string x. V (verifying) outputs accepted or rejected on inputs: the key k, the string x ...