> For the complete documentation index, see [llms.txt](https://cifer.gitbook.io/cifer-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cifer.gitbook.io/cifer-docs/documentation/cifer-sdk/architecture-and-security/secretscontroller-and-blackbox.md). # SecretsController and Blackbox ## SecretsController The on-chain controller is the authorization registry for Web3 secrets. Its state and events support: * Secret creation and creation fees * Ownership * Delegates * Synchronization state * Cluster and secret-type metadata * Public-key CID association * Transfers and authorization updates The SDK reads this state and builds transaction intents. It does not silently submit writes. ## Blackbox The Blackbox exposes discovery and cryptographic workflows: * Public-key resolution * Payload encryption and decryption * File uploads and downloads * Asynchronous job status * Web2 registration, sessions, principals, delegates, and permits * Health information used for SDK discovery The SDK's configured `blackboxUrl` determines the service environment. Do not mix secret identifiers, controller addresses, or job IDs across environments. ## Enclave cluster The cluster performs protected operations involving threshold key shards. A user-facing application should not need to retrieve or assemble private-key material itself. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://cifer.gitbook.io/cifer-docs/documentation/cifer-sdk/architecture-and-security/secretscontroller-and-blackbox.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.