[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Network](./puppeteer.protocol.network.md) > [SecurityDetails](./puppeteer.protocol.network.securitydetails.md) > [certificateId](./puppeteer.protocol.network.securitydetails.certificateid.md) ## Protocol.Network.SecurityDetails.certificateId property Certificate ID value. Signature: ```typescript certificateId: Security.CertificateId; ```