[3] 
[DFN[Signed Request]] ([DFN[[CODE[signed_request]]]])
は、
[[OAuth]]
が一般化する前に 
[[Facebook]]
の
[[Web API]]
が使っていた[[HTTP要求]]の[[認証]]プロトコルです。

[1] [CITE@ja[Signed Request - Facebook開発者]]
([TIME[2012-02-13 12:43:21 +09:00]] 版)
<https://developers.facebook.com/docs/authentication/signed_request/>

[2] [CITE@en[wakaba/perl-authen-signedrequest: Perl implementation of signed_request]], [TIME[2023-04-17T09:10:00.000Z]] <https://github.com/wakaba/perl-authen-signedrequest>