fixitysjekk

Fixitysjekk, also known as "fixity check," is a process used in digital preservation to verify the integrity of digital files. It ensures that the digital content has not been altered or corrupted since its creation or last fixity check. This is crucial for maintaining the authenticity and reliability of digital records, which are increasingly used in various fields such as archives, libraries, and research institutions.

The fixity check process typically involves calculating a checksum or hash value for a digital file. This value is a unique representation of the file's contents, and any change to the file will result in a different checksum. By comparing the current checksum to a previously stored checksum, it is possible to determine if the file has been altered.

Fixity checks can be performed using various tools and algorithms, with common methods including MD5, SHA-1, and SHA-256. The choice of algorithm depends on the specific requirements of the preservation system and the level of security needed.

Regular fixity checks are essential for digital preservation strategies. They help identify and address issues such as bit rot, where digital files degrade over time due to hardware failures or software obsolescence. By regularly verifying the integrity of digital files, institutions can ensure the long-term accessibility and usability of their digital collections.