17 lines
930 B
Plaintext
17 lines
930 B
Plaintext
tumbler
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n. 1. [Originally from the Xanadu hypertext project] A tumbler is a magic
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cookie generated as part of a record or message to give it a unique
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identity. Usually a tumbler includes an encoded form of its creation date,
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but if a software system has more than one concurrent process that could
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generate tumblers it must also include an encoding of the process ID. If
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tumblers will be shared across multiple network hosts, they must also
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include the host name or network address. Tumblers often include a hash of
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the rest of the message or record content so that it is possible to verify
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the correctness of the data the tumbler is attached to. 2. Variant text
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added to spam instances (often in the Subject line) to make them unique.
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This kind of tumbler is used to defeat schemes that check an exact hash of
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an incoming message against known spam signatures; it also compromises some
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kinds of statistical spam recognition.
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