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Can a root certificate be revoked by SHA-1?
The only case where this matters, is if the root is signed by SHA-1 it can be revoked by SHA-1. That is, somebody who can attack SHA-1 can construct a revocation for the root. And I’m absolutely sure the browser doesn’t know how to persist that so the vandal has accomplished no more than dropping SSL connections.
How can I check if my certificate is signed with SHA-1?
In order to check whether the certificate installed on your site or service was signed using SHA-1 or SHA-2 hash function family (including SHA-256), try running a quick online test or other available methods described in the “ How do I check my hashing algorithm? ” article in our knowledgebase.
How to generate a CA certificate with a SHA256 hash?
Have the intermediateSHA256 issuing CA generate a certificates signed with a sha256 or greater hash. Call it webServerSHA256. Install the rootSHA1, the intermediateSHA256, and the webServerSHA256 certificates into appropriate locations in Google Chrome.
Why is SHA-1 based Signature Algorithm Sunset initiative?
The SHA-1 based signature algorithm sunset initiative was brought forth by major CA/Browser Forum members and software companies: Google Inc, Mozilla Foundation, Microsoft Corporation. Read on for more info on the causes and SHA-1 deprecation schedule.
Why is it bad to use SHA-1 certificates?
Such attacks could allow an attacker to generate additional certificates that have the same digital signature as an original. The use of SHA-1 certificates for specific purposes that require resistance against these attacks is discouraged.
Is the SHA-1 certificate deprecated for Microsoft Edge?
This will only impact SHA-1 certificates that chain to a Microsoft Trusted Root CA. Manually-installed enterprise or self-signed SHA-1 certificates will not be impacted, although we recommend for all customers to quickly migrate to SHA-256. Additional information on Microsoft’s overall SHA-1 deprecation plans can be found on TechNet.
Why is the SHA 1 hash algorithm no longer secure?
The SHA-1 hash algorithm is no longer secure. Weaknesses in SHA-1 could allow an attacker to spoof content, execute phishing attacks, or perform man-in-the-middle attacks when browsing the web. Microsoft, in collaboration with other members of the industry, is working to phase out SHA-1.