Anyone may view or download a crate’s contents. Because of the public nature of <a href="http://crates.io/">Crates.io</a>, any personal data you might include in a Cargo.toml file uploaded to a crate will be publicly available. For example, if an email address is in the <code>authors</code> field in the Cargo.toml file, that email address will also be public.</p> <p>Due to its public nature, be aware if you include any private information in a crate, that information may be indexed by search engines or used by third parties.