[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-18。"],[],[],null,["# Understand mutual TLS at Google Cloud\n\nMutual TLS (mTLS) is an industry standard protocol for mutual authentication\nbetween a client and a server. The mTLS protocol ensures that both the client\nand server, at each end of a network connection, are who they claim they are by\nverifying that both possess the private key associated with the client\ncertificate.\n\n### What is a client certificate?\n\nA client certificate, also called a Transport Layer Security (TLS) certificate,\nis a file that contains important information for verifying a device's identity.\nThe certificate information includes the public key, a statement of who issued\nthe certificate (certificates can be issued by certificate authorities or self-\nsigned), and the certificate's expiration date.\n\n### How the Google APIs validate device identity\n\nThe TLS protocol uses a technique called public key infrastructure (PKI), which\nrelies on a pair of asymmetric keys: a public key and a private key. Anything\nencrypted with the private key can be decrypted only with the public key. The\nGoogle Cloud APIs use the TLS protocol to verify the identity of a device by\ndecrypting the message encrypted by the private key using the public key of the\ncertificate during the mTLS handshake. The successful decryption proves the\npossession of the private key which is only available from trusted devices.\n\nTo enable the mTLS handshake and validation process, a client must do the following:\n\n- Establish an mTLS connection with the Google APIs by using mTLS-specific API\n endpoints. The mTLS-specific endpoints have the following format: `[service].mtls.googleapis.com`\n\n- Discover and use the device certificate during the mTLS handshake. If you are\n using Endpoint Verification for certificate deployment, this type of certificate\n is automatically discovered and used by the supported clients.\n\nThe following diagram illustrates the mTLS handshake between a client and a\nGoogle API server:\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nWhat's next\n-----------\n\n- [Set up certificate-based access](/chrome-enterprise-premium/docs/set-up-cba)"]]
