# Trust Infra Three key components make up this DPI category: 1. **Digital Signatures or PKI**: To ensure a document, certificate, or data packet hasn't been tampered with, a nation needs to generate the capability to affix a verifiable digital signature. 2. **eSignatures**: The ability of an individual or entity to electronically sign a document digitally (via mobile) to indicate agreement 3. **Granular Consent**: The ability of an individual to indicate their consent to share data for a specific purpose and time period with an indicated third party, and generate an auditable and digitally signed consent artefact to indicate that intent. --- # Agent Instructions: 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: ``` GET https://docs.cdpi.dev/technical-notes/electronic-signature-pki-and-trust-infra.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.