# RAILGUN Assurance Suite RAILGUN has 3 main tools for auditability and assurance: * [Viewing Keys](/wiki/learn/wallets-and-keys.md#viewing-keys): Shareable read-only private key for auditability or investigatory purposes * [Private proofs of Innocence (PPOI)](/wiki/assurance/private-proofs-of-innocence.md): a Zero-Knowledge assurance tool that checks that tokens moving through RAILGUN do not originate from a known list of malicious activity. This is achieved via the use of cryptographic proofs, which keeps RAILGUN users’ data private. * [Koinly Tax Exports](/wiki/assurance/koinly-tax-exports.md): Easy file exports for use in the Koinly tax software --- # 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.railgun.org/wiki/assurance/railgun-assurance-suite.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.