# API 认证和Laravel Passport

大多数API需要某种形式的身份验证才能访问部分或全部数据，Laravel 5.2引入了一个简单的“令牌”认证方案，我们将在稍后介绍，但在Laravel 5.3及更高版本中，我们有一个名为Passport的新工具（一个单独的包，通过Composer引入），在应用程序中提供功能齐全的OAuth 2.0服务器，其中包含用于管理客户端和令牌的API和UI组件。


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