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This 22-page “SQRL Explained” document provides a complete description, technical overview and explanation of every feature of the SQRL system. Various SQRL clients and server components currently exist for Windows, Linux & macOS (with WINE), Android, iOS, Chrome, Firefox & Edge. And SQRL demo websites may be used to experiment with SQRL's operation and features.

The forthcoming “SQRL Implementation” document will provide a full description of SQRL's “over-the-wire” protocols, providing all of the information required to anyone interested in building SQRL system components. It will also provide extensive implementation notes and important reminders about the operation of security-critical aspects of SQRL's implementation.

The SQRL Forums are online and available to anyone who is curious to learn more, and GRC's v1.0 release of the reference SQRL client for Windows can be downloaded with the links below:

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• 2019/06/14 : Version 0.05 - Added 3-page glossary of standard crypto and SQRL terms.
• 2019/06/15 : Version 0.06 - Added a description of SQRL's “Ask” facility and fixed Glossary typos.
• 2019/06/20 : Version 0.07 - Minor tune-ups & tweaks, and added some additional end notes.
• 2019/06/21 : Version 1.00 - Finished this first “SQRL Explained” document and decided to place the “SQRL Implementation” specification in a separate document.
• 2019/06/22 : Version 1.01 - Additional tweaks and small cosmetic fixes.