B66zip

: If you receive an archive from an unknown source and your extraction software returns an "unsupported method" error, delete it immediately.

: An archive is created with a header that falsely claims the content is uncompressed. B66zip

: Ensure your security software is up to date, as many vendors are currently implementing "aggressive" scanning modes to detect these mismatches. Alternative Meanings : If you receive an archive from an

: Because the data looks like random, uncompressed bytes, most antivirus scanners (over 95% at the time of discovery) fail to recognize known malware signatures within it. B66zip