Updated 14 August 2026
Terms
Using Decipher
You may use the public Challenges and Workbench for personal solving, study, and ordinary sharing of links. Do not interfere with the service, attempt to access another person's account, or use automated traffic that impairs access for other Solvers.
Solver Accounts
Keep account credentials private and provide an email address you control. Accounts may be suspended or removed when they are used to disrupt the service, evade access controls, or publish material unlawfully. You can delete an ordinary Solver Account in Account settings.
Authored material
A Challenge Author must have the right to submit the material they provide. The author keeps ownership of their material and gives Decipher permission to store, reproduce, adapt for technical presentation, and publicly display it as needed to operate the Challenge. A correction or removal request will be reviewed with the Challenge's source, authorship, and effect on existing Solver records in mind.
Availability and changes
Decipher is under active development. Features, Challenges, and availability may change, and the service may be interrupted for maintenance or failures. Published historical and research claims may also be corrected when better evidence appears.
Contact
Questions about these terms, an account, or removal of material can be sent to contact@decipher.nu. Account data is covered separately by the Privacy page.