![]() Using this technology, when a user enrolls to obtain a certificate, they specify the private key information, the CSP information, and the certificate store name for the certificate. Microsoft has developed a certificate store technology to reduce the above complexity. So in all, there are several items that need to be provided in order to generate a digital signature. Additionally, the signature must include the certificate chain for the cryptographic service provider (CSP), up to a root certificate trusted by the user, in order for the signed file to be authenticated. ![]() Thus, the private key must be supplied through some other means. The digital certificate used in the signature usually supplies the signer identification information, however. In order to perform a package signing operation, both private key and signer identification information must be supplied. When the publisher of a package signs the package with its private key, the installer can use the publisher's public key to verify the publisher's identity. ![]() The data set includes the entity's public cryptographic key. A certificate is a set of data that completely identifies an entity, and is issued by a certification authority only after that authority has verified the entity's identity. About Digital SignaturesĪ digital signature is based on a signing certificate. As for an MSIX/AppX package, it is required to be digitally signed to be deployed. Properly signed MSI packages can be installed via GPO even within the environments with strict security policies. ![]() Windows Installer validates that a package hasn't been changed if it contains a digital signature when attempting to install it. ![]() You can sign Windows Installer packages to help guarantee that users know if your packages have been modified and that they came from you, the publisher. Verifying the signature using the publisher's public key or a trusted certificate authority that signed their public key validates the publisher. Digital signatures also help verify that a package came from a particular publisher by encrypting the hash with the publisher's private key. Digitally signing files helps protect against changes to a file by validating that a hash of the current file matches the hash stored in the digital signature. ![]()
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