[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Network](./puppeteer.protocol.network.md) > [AuthChallenge](./puppeteer.protocol.network.authchallenge.md) > [scheme](./puppeteer.protocol.network.authchallenge.scheme.md) ## Protocol.Network.AuthChallenge.scheme property The authentication scheme used, such as basic or digest Signature: ```typescript scheme: string; ```