4. Preservation Readiness: Checksum Management for Digital Newspapers

Stewards of digital newspapers need to be able to attest to the completeness, correctness, authenticity, and renderability of their collections over time. One way that institutions can do this is to require that checksums (digital signatures) be generated for their master digital files at the time of their creation and to store and compare these checksums over time. Recent digitization specifications and standards recommend that when institutions outsource digitization, they request a listed record (or manifest) of files and their checksums from their vendors or digitization units and actively use these to verify their digitized collections upon receipt (i.e., to make sure that the collection arrives intact). With this manifest of files and their checksums, stewards can also perform routine audits and implement repairs on corrupted objects from backups or preservation copies as needed over time.

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