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- 1TWCA emergency revokes certificates after entropy flaw found▼TWCA announces emergency TWCA certificate revocation after researchers discovered non-compliant serial number entropy ac
Taiwan's TWCA is carrying out an emergency revocation of certificates after researchers found that serial numbers generated by ten of its intermediate certificate authorities lacked the entropy required by CA/Browser Forum rules. Weak serial number randomness can risk certificate collisions and undermines PKI guarantees, prompting the swift revocation effort across affected intermediates.