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<div class="WordSection1">
<p class="MsoNormal">Hi Folks!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve drafted up the redline for the changes for an upcoming ballot on the current version of the
<a href="https://cabforum.org/wp-content/uploads/baseline_requirements_for_the_issuance_and_management_of_code_signing.v.2.0.pdf">
Baseline Requirements for the Issuance and Management of Publicly-Trusted Code Signing Certificates</a> on section 16.2 and 16.3 as it pertains to subscriber private key protection requirements (leaf-signing cert private keys). The goal is to collapse the requirements
on non-EV and EV, and to include support for cloud-based key protection solution offered by GCP, AWS, and Azure. Please review and provide comments on the verbiage below and the redline changes in the document attached, and
<b>if you would be willing to endorse this change in the upcoming ballot, please let me know</b>.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><a name="_Toc400025925"></a><a name="_Toc39753679"></a><a name="_Toc17488556"><span style="mso-bookmark:_Toc39753679"><span style="mso-bookmark:_Toc400025925"><b><i>16.2 Signing Service Requirements</i></b></span></span></a><b><i><o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:.5in">The Signing Service MUST ensure that a Subscriber’s private key is generated, stored, and used in a secure environment that has controls to prevent theft or misuse. A Signing Service MUST enforce multi-factor authentication
to authorize Code Signing and obtain a representation from the Subscriber that they will securely store the tokens required for multi-factor access.
<span lang="EN">A system used to host a Signing Service MUST NOT be used for web browsing. The Signing Service MUST run a regularly updated antivirus solution to scan the service for possible virus infection. The Signing Service MUST comply with the Network
Security Guidelines as a “Delegated Third Party”.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span lang="EN">For Code Signing Certificates,
</span>Signing Services shall protect private keys in a FIPS 140-2 level 2 (or equivalent) crypto module. Techniques that may be used to satisfy this requirement include:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.25in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:1.25in;text-indent:-.25in;mso-list:l3 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use of an HSM, verified by means of a manufacturer’s certificate;<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.25in;text-indent:-.25in;mso-list:l3 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A hardware crypto module provided by the CA;<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.25in;text-indent:-.25in;mso-list:l3 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Contractual terms in the subscriber agreement requiring the Subscriber to protect the private key to a standard equivalent to FIPS 140-2 level 2 and with compliance being confirmed by means of an audit.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.25in;text-indent:-.25in;mso-list:l3 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Cryptographic algorithms, key sizes and certificate life-times for both authorities and Subscribers are governed by the NIST key management guidelines.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.25in;text-indent:-.25in;mso-list:l3 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A Cloud-based key protection solution with the following requirements enabled on the subscription, and a usage pattern as follows:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l2 level2 lfo4">
<![if !supportLists]><i><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>A hardware crypto module with a unit design form factor certified as conforming to at least FIPS 140-2 Level 2, eIDAS Protection Profile: EN 419 221-5, or equivalent;<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l2 level2 lfo4">
<![if !supportLists]><i><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>Key creation, storage, and usage of private key must remain within the security boundaries of the cloud solutions hardware crypto module;<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l2 level2 lfo4">
<![if !supportLists]><i><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>Subscription must be configured to log access, operations, and configuration changes on the key. The configuration change log is available for audits.<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><a name="_Toc400025926"></a><a name="_Toc39753680"></a><a name="_Toc17488557"><span style="mso-bookmark:_Toc39753680"><span style="mso-bookmark:_Toc400025926"><b><i>16.3 Subscriber Private Key Protection</i></b></span></span></a><b><i><o:p></o:p></i></b></p>
<p class="MsoNormal" style="margin-left:.5in">For Code Signing Certificates, the CA MUST obtain a representation from the Subscriber that the Subscriber will use one of the following options to generate and protect their Code Signing Certificate private keys:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"> <o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:-.25in;mso-list:l4 level1 lfo6">
<![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A hardware crypto module with a unit design form factor certified as conforming to at least FIPS 140-2 Level 2, eIDAS Protection Profile: EN 419 221-5, or equivalent;<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:-.25in;mso-list:l4 level1 lfo6">
<![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A Cloud-based key protection solution with the following requirements enabled on the subscription, and a usage pattern as follows:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l1 level2 lfo8">
<![if !supportLists]><i><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>A hardware crypto module with a unit design form factor certified as conforming to at least FIPS 140-2 Level 2, eIDAS Protection Profile: EN 419 221-5, or equivalent;<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l1 level2 lfo8">
<![if !supportLists]><i><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>Key creation, storage, and usage of private key must remain within the security boundaries of the cloud solutions hardware crypto module;<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:1.5in;text-indent:-.25in;mso-list:l1 level2 lfo8">
<![if !supportLists]><i><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span></i><![endif]><i>Subscription must be configured to log all access, operations, and configuration changes on the key. The configuration change log is available for audits.<o:p></o:p></i></p>
<p class="MsoNormal" style="margin-left:.5in"><i><o:p> </o:p></i></p>
<p class="MsoNormal" style="margin-left:1.0in;text-indent:-.25in;mso-list:l4 level1 lfo6">
<![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>A type of hardware storage token with a unit design form factor of SD Card or USB token certified as conformant with FIPS 140 Level 2 or eIDAS Protection Profile: EN 419 221-5). The Subscriber MUST also warrant that it will keep the
token physically separate from the device that hosts the code signing function until a signing session is begun.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in">For Code Signing Certificates, CAs SHALL ensure that the Subscriber’s private key is generated, stored and used in a crypto module that meets or exceeds the requirements of FIPS 140-2 level 2, eIDAS Protection Profile:
EN 419 221-5, or equivalent. Acceptable methods of satisfying this requirement include (but are not limited to) the following:
<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:99.0pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The Subscriber counter-signs certificate requests that can be verified by using a manufacturer’s certificate indicating that the key is managed in a suitable hardware module;<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:99.0pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The Subscriber provides a suitable IT audit indicating that its operating environment achieves a level of security at least equivalent to that of FIPS 140-2 level 2, eIDAS Protection Profile: EN 419 221-5, or equivalent;<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:99.0pt;text-indent:-.25in;mso-list:l0 level1 lfo10">
<![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The Subscriber provides a suitable report of the cloud key protection solution subscription configuration protecting the key in hardware crypto module with a unit design form factor certified as conforming to at least FIPS 140-2 Level
2, eIDAS Protection Profile, EN 419 221-5, or equivalent.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Ian McMillan<o:p></o:p></p>
<p class="MsoNormal">Microsoft<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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