Private State Tokens

Private State Tokens are a concept in web development and online privacy that form part of a new privacy-preserving mechanism designed to prevent tracking across different sites. This feature allows a server to validate a user’s authenticity without revealing their identity or exposing any data that could be used for cross-site tracking, enhancing user privacy.

私有状态令牌是在Web开发和在线隐私中的一个概念，它是防止跨站点跟踪的新隐私保护机制的一部分。这个特性允许服务器验证用户的真实性，而不会暴露其身份或暴露可能用于跨站点跟踪的数据，从而增强用户隐私。

Here’s how Private State Tokens can be conceptualized:

以下是如何概念化私有状态令牌：

1. Token Generation: The server generates a Private State Token for a user, which is cryptographically signed and can be validated by the server without knowing the user’s identity.

   令牌生成: 服务器为用户生成一个私有状态令牌，该令牌经过加密签名，服务器可以在不知道用户身份的情况下验证该令牌。

2. Token Validation: When the user interacts with the server again, the server can validate the token to ensure it is legitimate, confirming the user’s authenticity without cross-site tracking.

   令牌验证: 当用户再次与服务器交互时，服务器可以验证令牌以确保其合法性，从而在不进行跨站点跟踪的情况下确认用户的真实性。

Here’s how Private State Tokens work in theory:

以下是私有状态令牌在理论上的工作原理：

1. User visits Site A.
2. Site A generates and sends a Private State Token to the user.
3. The user visits Site B, which requests the token from Site A.
4. Site A verifies the token and responds without revealing user identity.
5. Site B validates the user's authenticity based on Site A's response.

1. 用户访问站点A。
2. 站点A生成并发送一个私有状态令牌给用户。
3. 用户访问站点B，站点B请求站点A提供令牌。
4. 站点A验证令牌，并在不透露用户身份的情况下做出响应。
5. 站点B根据站点A的响应验证用户的真实性。

The comparison of Private State Tokens with other privacy mechanisms is shown in the table below:

私有状态令牌与其他隐私机制的比较如下表所示：

Private State Tokens are very useful for enhancing privacy while ensuring that user authenticity can still be validated by servers without relying on traditional tracking mechanisms.

私有状态令牌在增强隐私保护的同时，仍然可以确保服务器在不依赖传统跟踪机制的情况下验证用户的真实性，非常有用。

以下是关于私有状态令牌的5个面试问题及其答案

1. What are Private State Tokens, and how do they enhance privacy?

什么是私有状态令牌，它们如何增强隐私保护？

Private State Tokens are a privacy-preserving mechanism that allows servers to validate user authenticity without cross-site tracking, thereby enhancing privacy.

私有状态令牌是一种保护隐私的机制，它允许服务器在不进行跨站点跟踪的情况下验证用户的真实性，从而增强隐私保护。

2. How do Private State Tokens differ from traditional cookies?

私有状态令牌与传统Cookie有何不同？

Private State Tokens do not carry user-identifiable information and prevent cross-site tracking, whereas cookies can store user data and are sent with each HTTP request.

私有状态令牌不携带用户可识别信息，并防止跨站点跟踪，而Cookie可以存储用户数据，并随每个HTTP请求一起发送。

3. How can Private State Tokens prevent cross-site tracking?

私有状态令牌如何防止跨站点跟踪？

Private State Tokens use cryptographic methods to validate authenticity without revealing any identifying information, preventing cross-site tracking.

私有状态令牌使用加密方法验证真实性，而不会透露任何识别信息，从而防止跨站点跟踪。

4. What are the potential use cases for Private State Tokens?

私有状态令牌的潜在用例是什么？

Use cases include preventing cross-site tracking while validating user sessions, enhancing security in web applications, and maintaining user privacy.

潜在用例包括在验证用户会话的同时防止跨站点跟踪，增强Web应用程序的安全性，并维护用户隐私。

5. How are Private State Tokens generated and validated?

私有状态令牌是如何生成和验证的？

Tokens are generated by the server, cryptographically signed, and validated by the server upon future requests without revealing the user’s identity.

令牌由服务器生成，经过加密签名，并在以后的请求中由服务器验证，而不透露用户的身份。

Recommended Resources:

1. MDN Web Docs: Privacy and Security
2. W3C: Private State Tokens