Security Blog
The latest news and insights from Google on security and safety on the Internet
Improved Digital Certificate Security
September 18, 2015
Posted by Stephan Somogyi, Security & Privacy PM, and Adam Eijdenberg, Certificate Transparency PM
On September 14, around 19:20 GMT, Symantec’s Thawte-branded CA issued an Extended Validation (EV) pre-certificate for the domains
google.com
and
www.google.com
. This pre-certificate was neither requested nor authorized by Google.
We discovered this issuance via
Certificate Transparency
logs, which Chrome has required for EV certificates starting January 1st of this year. The issuance of this pre-certificate was recorded in both Google-operated and DigiCert-operated logs.
During our ongoing discussions with Symantec we determined that the issuance occurred during a Symantec-internal testing process.
We have updated Chrome’s revocation metadata to include the public key of the misissued certificate. Additionally, the issued pre-certificate was valid only for one day.
Our primary consideration in these situations is always the security and privacy of our users; we currently do not have reason to believe they were at risk.
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