[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Security](./puppeteer.protocol.security.md) > [CertificateSecurityState](./puppeteer.protocol.security.certificatesecuritystate.md) > [keyExchangeGroup](./puppeteer.protocol.security.certificatesecuritystate.keyexchangegroup.md) ## Protocol.Security.CertificateSecurityState.keyExchangeGroup property (EC)DH group used by the connection, if applicable. Signature: ```typescript keyExchangeGroup?: string; ```