# One File, Many Hashes: The New Alternative Checksums Feature

- Institution: CERN
- Speaker: Gianmaria Del Monte
- Year: 2026
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3023528)
- Licence: [CERN](https://copyright.web.cern)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

This presentation introduces Alternative Checksums in EOS 5.4.0, a feature that enables the storage of multiple hash types for a single file alongside the default system checksum. By allowing for various algorithms, such as MD5 or SHA-256, on a per-directory basis, EOS provides the necessary flexibility to meet diverse experiment requirements.

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## Lectures

1. [One File, Many Hashes: The New Alternative Checksums Feature](https://invisiblenetwork.ai/learn/cern/3023528/b65688fb0409), 23 min (CERN's player)