OAuth:为什么隐式授权类型称为隐式？

Question

有人可以向我解释为什么 OAuth 2.0 的隐式流程(授权类型)被称为“隐式”？

Answer 1

specification说这个:

In the implicit flow, instead of issuing the client an authorization code, the client is issued an access token directly (as the result of the resource owner authorization). The grant type is implicit, as no intermediate credentials (such as an authorization code) are issued.