Versions
Several versions of the RAR format have been noted by third party developers:
- RAR1.3 (original, does not have "Rar!" signature)
- RAR1.5
- RAR2
- RAR3 (current) - implemented by developers of Rarlab WinRAR version 2.9 and released in WinRAR version 3.00. Many changes including:
- File extensions changed from {volume name}.rar, {volume name}.r00, {volume name}.r01, etc. to {volume name}.part001.rar, {volume name}.part002.rar, etc.
- Encryption algorithm was changed from cipher block chaining (CBC) mode to AES (Advanced Encryption Standard) with 128 bit key length.
- Encryption of both file data and file headers.
- Improved compression algorithm using 4MB dictionary size, Dmitry Shkarin's PPMII algorithm for file data, and selective preprocessing algorithms based on platform and source file type.
- Optional creation of "recovery volumes" (.rev files) with redundancy data which can be used to reconstruct missing files in a volume set.
- Support for archive files larger than 9 GB.
- Support for Unicode names.
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Famous quotes containing the word versions:
“The assumption must be that those who can see value only in tradition, or versions of it, deny man’s ability to adapt to changing circumstances.”
—Stephen Bayley (b. 1951)