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Quarantine (computing)
Quarantine is a function of antivirus software that isolates infected files on a computer's hard disk. Files put in quarantine are no longer capable of infecting their hosting system.
==Development and release==
In December, 1988, shortly after the Morris Worm, work started on ''Quarantine'', an anti-malware and file reliability product. Released in April, 1989, ''Quarantine'' was the first such product to use file signature instead of viral signature methods.
The original ''Quarantine'' used Hunt's B-tree database of files with both their CRC16 and CRC-CCITT signatures. Doubling the signatures rendered useless, or at least immoderately difficult, attacks based on CRC invariant modifications. Release 2, April 1990, used a CRC-32 signature and one based on CRC-32 but with a few bits in each word shuffled. The subsequent MS-AV from Microsoft, designed by Check Point, apparently relied on only an eight bit checksum—at least out of a few thousand files there were hundreds with identical signatures.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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