See how to view the details for signatures and certificates.

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

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Developers have made amazing games and content for the Xbox network. To protect customers and developers, we provide a safe and secure way to make purchases in the Microsoft Store. To maintain this security, Xbox monitors for instances of marketplace theft or solicitation from the Xbox community.

Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Xbox Support 提供有关 Xbox、Game Pass 和账单问题的帮助，并通过社区提供建议和客户服务。

Describes the steps to take when you receive an "Outlook blocked access to the following potentially unsafe attachments" message in Outlook.

Learn how to identify and open encrypted and protected emails no matter what email client you're using.

Check the Xbox services, games, and apps for any service outages.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.