Data Compression


Criteria

Survey Formats

Basics

Compression Methods

Data Formats

Files

BZIP2

Compression

Data Structure

Data Integrity

Applications

GZIP

ZIP

Audio Data

Image Data

Video Data


Glossary

Index


Download


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BZIP2: Data Integrity


Apart from classical error detection by means of CRC32, BZIP2 does not provide further options to protect the contents.


Due to the fact that the error detection is bound to the block size, damaged blocks may be ignored during decoding. For this purpose an appropriate tool (bzip2recover.exe) is available, that is able to extract all undamaged blocks of a file.


Even in the case of errors the individual blocks may be addressed with the help of the 48 bit identifier. This is an advantage of BZIP2 in comparison to other procedures detecting the end of a block from decoded data, as Deflate for example.


Features for encryption of the contents or attribute are not specified for BZIP2.


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