Introduction¶

Soledad consists of a client library and server daemon that allows applications to securely share a common state among devices. The local application is presented with a simple, document-centric searchable database API. Any data saved to the database by the application is client-encrypted, backed up in the cloud, and synchronized among a user’s devices. Soledad is cross-platform, open source, scalable, and features a highly efficient synchronization algorithm.

Key aspects of Soledad include:

Client and server: Soledad includes a server daemon and a client application library.
Client-side encrypted sync: Soledad puts very little trust in the server by encrypting all data before it is synchronized to the server and by limiting ways in which the server can modify the user’s data.
Encrypted local storage: All data cached locally is stored in an encrypted database.
Document database: An application using the Soledad client library is presented with a document-centric database API for storage and sync. Documents may be indexed, searched, and versioned.
Encrypted attachments: storage and synchronization of Blobs is supported.

Soledad is an acronym of “Synchronization of Locally Encrypted Documents Among Devices” and means “solitude” in Spanish.