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Microsoft Identity Verification Root Certificate Authority 2020: A Guide for IT Professionals



NOTE To correctly verify modules signed by Azure Code Signing, computers are required to have the "Microsoft Identity Verification Root Certificate Authority 2020" certificate authority (CA) installed. By default, root certificates are installed automatically if the computer is connected to the Internet. If the "automatic root certificates update" setting is disabled or the computer is offline, you must install this root certificate into the certificate store of "Local Computer" under "Trusted Root Certification Authorities". To download the certificate, see PKI Repository - Microsoft PKI Services.




microsoft identity verification root certificate authority 2020 download



Most Windows endpoints will already meet the CA certificate dependency because new root certificates are downloaded through automatic update mechanisms. However, customers who have disabled the automatic update mechanism will need to ensure that the new Microsoft CA certificate is in place.


In addition to having the required Windows patches, to correctly verify modules signed by Azure Code Signing, devices must have the "Microsoft Identity Verification Root Certificate Authority 2020" certificate authority (CA) installed.


The clients of a CA are server supervisors who call for a certificate that their servers will bestow to users. Commercial CAs charge money to issue certificates, and their customers anticipate the CA's certificate to be contained within the majority of web browsers, so that safe connections to the certified servers work efficiently out-of-the-box. The quantity of internet browsers, other devices and applications which trust a particular certificate authority is referred to as ubiquity. Mozilla, which is a non-profit business, issues several commercial CA certificates with its products.[4] While Mozilla developed their own policy, the CA/Browser Forum developed similar guidelines for CA trust. A single CA certificate may be shared among multiple CAs or their resellers. A root CA certificate may be the base to issue multiple intermediate CA certificates with varying validation requirements.


As of 24 August 2020[update], 147 root certificates, representing 52 organizations, are trusted in the Mozilla Firefox web browser,[10] 168 root certificates, representing 60 organizations, are trusted by macOS,[11] and 255 root certificates, representing 101 organizations, are trusted by Microsoft Windows.[12] As of Android 4.2 (Jelly Bean), Android currently contains over 100 CAs that are updated with each release.[13]


In 2020, according to independent survey company Netcraft, "DigiCert is the world's largest high-assurance certificate authority, commanding 60% of the Extended Validation Certificate market, and 96% of organization-validated certificates globally.[17]


A CA issues digital certificates that contain a public key and the identity of the owner. The matching private key is not made available publicly, but kept secret by the end user who generated the key pair. The certificate is also a confirmation or validation by the CA that the public key contained in the certificate belongs to the person, organization, server or other entity noted in the certificate. A CA's obligation in such schemes is to verify an applicant's credentials, so that users and relying parties can trust the information in the issued certificate. CAs use a variety of standards and tests to do so. In essence, the certificate authority is responsible for saying "yes, this person is who they say they are, and we, the CA, certify that".[24]


An attacker who steals a certificate authority's private keys is able to forge certificates as if they were CA, without needed ongoing access to the CA's systems. Key theft is therefore one of the main risks certificate authorities defend against. Publicly trusted CAs almost always store their keys on a hardware security module (HSM), which allows them to sign certificates with a key, but generally prevent extraction of that key with both physical and software controls. CAs typically take the further precaution of keeping the key for their long-term root certificates in an HSM that is kept offline, except when it is needed to sign shorter-lived intermediate certificates. The intermediate certificates, stored in an online HSM, can do the day-to-day work of signing end-entity certificates and keeping revocation information up to date.


DigiCert root certificates are among the most widely-trusted authority certificates in the world. As such, they are automatically recognized by all common web browsers, mobile devices, and mail clients.


The good news is that Windows does not really have an issue with the cryptographic functions to validate the signature of an elliptic curve certificate! That verification works correctly. The problem is how the trust chain comparison is done to prove that the chain of signatures is correctly ending in the catalog of trusted root CAs.


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A different (and maybe more natural) algorithm is to compare certificates by their common name and/or their serial number and whenever you have a match, continue the trust chain and verification with the certificate in the trust store. Why is Windows comparing public keys instead? We can only speculate but the advantage might be for Enterprises who want to swap their certificates without rolling out new root CAs to all client computers. Imagine an organization that maintains its own PKI and installs its own Root CA in the store of trusted certificates. When these companies go through mergers and acquisitions and the company name may change. This would be a good time to also change the common name of your signing certificate. However, if you do not have a good way to remote maintain all clients and update the certificate in the trusted store, it is easier to tell the Cooperation to use the original key pair of public and private keys and create a new certificate with that same key pair. The new cert will still match the old cert and no other client update is necessary. Convenient! But Is it secure? At this point it is not really a chain of trusted certificates but a chain of trusted public keys.


The root problem of this approach is that the complete cryptographic verification happens with the embedded certificates and only after verification the match against the entry in the trusted Root CAs store is done. That always has room for oversights and incomplete matching algorithms as we have seen with this vulnerability. A safe approach is to first match the certificates (or public keys), find the corresponding entry in the Trusted Root CA store and then use that trusted certificate to continue the signature verification. That way, the verification fails on the safe side and broken chains can be identified easily.


The Adobe Approved Trust List (AATL) allows users to create certificate-based signatures that are trusted whenever the signed document is opened in Acrobat 9 or Reader 9 and later. Both Acrobat and Reader access an Adobe hosted web page to download a list of trusted root digital certificates every 30 days. Any certificate-based signature created with a credential that can trace a relationship back to a certificate on this list is trusted. The trusted root certificates have been verified by Adobe and other authorities to meet specific technical requirements. They represent high assurance identity and signing credentials. The certificates include government and citizen credentials from across the world. In addition, they include credentials from global commercial certificate authorities and qualified certification service providers (CSPs) in Europe.


Yes, if and when you perform the CA certificate update on your database, there will be a restart. For those customers who are using SSL/TLS to connect to their databases and require certificate verification, you will need to restart on or before March 5, 2020. You can choose to schedule the operation to be in the next maintenance window or run immediately by using the RDS console, RDS API, or the AWS CLI.


Please download CA certificates from trusted sources: For the root certificate download the "SHA-2 Root: USERTrust RSA Certification Authority" (Expires Jan 2038) from SectigoFor the intermediate certificate download the "InCommon RSA Server CA [PEM]" (Expires October 5, 2024) from Internet2


The CA plays a vital role in the chain of trust, a hierarchical trust model that consists of root certificates, intermediate certificates and SSL certificates. Its activities start with a root certificate, which is used as the ultimate basis for trust in all certificates the authority issues.


The CA will use that root certificate to create intermediate certificates, i.e., the certificates used to sign the digital certificates issued by the authority. The root certificate should never be used directly for signing digital certificates. Different intermediate certificates support different purposes.


Note: After the built-in certificate authority (CA) renewal succeeds, t he MDM profile for computers and mobile devices is automatically queued for renewal. The next time computers and mobile devices check in to Jamf Pro, the MDM profile will be renewed, and the MDM Profile Expiration Date field value in the inventory will show the new expiration date. The device identity certificates will expire in two years. To monitor which MDM profiles are not renewed, you can create a smart computer or mobile device group and set the MDM Profile Renewal Needed search criteria value to "Yes".


The Symantec Diagnostic Tool v2.1.300 or higher requires the DigiCert Trusted Root G4 certificate to be installed as a Trusted Root Certificate. Windows will automatically download and install the certificate since it is part of the July 2020 Microsoft Trusted Root program. However this will not happen if your system is unable to communicate with the Windows Server Update Services, the policy "Turn off Automatic Root Certificate Updates" is enabled, or your OS does not support SHA2 only code signing certificates.


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