Zerostash: Zero-metadata object store

[grarpamp]

https://github.com/rsdy/zerostash

Zerostash is a deduplicated, encrypted data store that provides native
versioning capabilities, and was designed to secure all metadata
related to the files, including the exact size of the data that is
stored in the containers.

Use cases

    Versioned backups in the cloud, or external hard drives
    Encrypt and store entire workspaces for fast sync between computer
    Easily sync & wipe data & encryption programs while travelling
    Storage and sync backend for offsite backups

Threat model

    Protect data confidentiality, integrity and authenticity
    The exact size of data should not be known
    Individual user data shouldn't be attributable on shared storage
    Once a data is shared, it is no longer secure.
    Deleting data from the storage should be possible
    Access to only the key and raw data should not be sufficient for
full data compromise