P7S file is a PKCS #7 Digital Signature. A digital signature is a type of asymmetric cryptography. For messages sent through an insecure channel, a properly implemented digital signature gives the receiver reason to believe the message was sent by the claimed sender.

Common .p7s file type descriptions:

PKCS #7 Signature
"PKCS #7"-Signatur
Firma PKCS 7
Assinatura PKCS n.º7
Подпись PKCS #7

Applications, associated with .p7s files

	Crypto Shell Extensions by Microsoft Corporation
	Run a DLL as an App by Microsoft Corporation
	Adobe Reader by Adobe Systems®, Incorporated Adobe Reader software is the free global standard for reliably viewing, printing, and commenting on PDF documents. It can open and interact with all types of PDF content, including forms and multimedia.
	Applicazione DiKe 5 by InfoCert S.p.A.

.p7r

.paa