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Understanding Code Signing for Software Security

How digital signatures verify publisher identity and code integrity

Why timestamping keeps signed code trusted after the certificate expires

How self-signed, publicly trusted, and EV certificates differ in trust

Current standards for keys, validity, and private key protection

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    Insights About the Whitepaper

    How code signing builds trust across the software supply chain, from certificate issuance to long-term validation.

    Every signature is checked three ways

    Before code runs, the system validates the hash, the certificate chain to a trusted root, and revocation status. Any failure blocks execution.

    Timestamps outlast expiring certificates

    An RFC 3161 timestamp proves when code was signed, so it stays trusted for years after the signing certificate expires.

    Signed code earns trust faster

    Signed applications build SmartScreen reputation roughly twice as fast as unsigned ones, and EV-signed binaries can launch with almost no warnings.

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