[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Security](./puppeteer.protocol.security.md) > [CertificateSecurityState](./puppeteer.protocol.security.certificatesecuritystate.md) > [obsoleteSslKeyExchange](./puppeteer.protocol.security.certificatesecuritystate.obsoletesslkeyexchange.md) ## Protocol.Security.CertificateSecurityState.obsoleteSslKeyExchange property True if the connection is using an obsolete SSL key exchange. Signature: ```typescript obsoleteSslKeyExchange: boolean; ```