For one-to-one interactions, the service public key is clearly used.

对于一对一交互，服务公钥的使用非常明确。

youdao

Typically for one-to-one interactions we use the service public key to encrypt information (and provide confidentiality).

对于一对一交互，我们通常使用服务公钥来加密信息并提供机密性。

youdao

We are here to provide a service for the public.

我们来这里是为公众服务。

《牛津词典》

Government and private groups are using public service announcements and events to bring more attention to the problem.

VOA: special.2010.07.01

Can it be re-directed, can it be re-channeled ? in the service of the public good?

它是否能被重新导向，重新导入,为公共利益服务？

耶鲁公开课 - 政治哲学导论课程节选

So most of the people who are here at the Kennedy School have a commitment to public service,

肯尼迪学院的大部分学生有志于公共服务，

肯尼迪学校 - SpeakingMax英语口语达人

Ofcom suggested three "realistic" ways to fund the new public service channel, as well as public service broadcasting in general.

BBC: NEWS | Entertainment | Ofcom plans 'public service TV'

They had far more in common than the issues that divided them - a love for their country that led them from military service to public service.

NPR: Text of the Democratic Response to the State of the Union Address

Public Service Media (PSM) is media which fulfils the same public purposes as public service broadcasting, but uses digital media and platforms, including the Internet, instead of broadcast television or radio.

UNESCO: Public Service Media