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Charset detection is particularly unreliable in Europe, in an environment of mixed ISO-8859 encodings. These are closely related eight-bit encodings that share an overlap in their lower half with ASCII and all arrangements of bytes are valid. There is no technical way to tell these encodings apart and recognizing them relies on identifying ...
The use of the EICAR test string can be more versatile than straightforward detection: a file containing the EICAR test string can be compressed or archived, and then the antivirus software can be run to see whether it can detect the test string in the compressed file. Many of the AMTSO Feature Settings Checks [5] are based on the EICAR test ...
ASCII (/ ˈ æ s k iː / ⓘ ASS-kee), [3]: 6 an acronym for American Standard Code for Information Interchange, is a character encoding standard for electronic communication. . ASCII codes represent text in computers, telecommunications equipment, and other devic
Extended ASCII is a repertoire of character encodings that include (most of) the original 96 ASCII character set, plus up to 128 additional characters.
A wide character refers to the size of the datatype in memory. It does not state how each value in a character set is defined. Those values are instead defined using character sets, with UCS and Unicode simply being two common character sets that encode more characters than an 8-bit wide numeric value (255 total) would allow.
Strings are recognized by looking for sequences of at least 4 (by default) printable characters terminating in a NUL character (that is, null-terminated strings).Some implementations provide options for determining what is recognized as a printable character, which is useful for finding non-ASCII and wide character text.
While "Bush hid the facts" is the sentence most commonly presented to induce the error, the bug can be triggered by other strings, for example "hhhh hhh hhh hhhhh" [2] or "this app can break", [3] and even "a "or "z!". [1] Diagram explaining the bug. The bug occurs when the string is passed to the Win32 charset detection function IsTextUnicode.
ISO/IEC 646 is a set of ISO/IEC standards, described as Information technology — ISO 7-bit coded character set for information interchange, and developed in cooperation with ASCII at least since 1964.