Making the internet more secure and trusted

Welcome to WoSign Certificate Transparency Log Server 1

Open acceptance policy: This log accepts all roots that are enabled for the server authentication trust purpose in one or more of the Microsoft, Mozilla and Apple root programs. We will update this log's list of accepted roots from time to time in accordance with this policy

Free: There is no cost to CAs for having a root accepted by this log. There is also no cost for submitting certificates/precertificates to this log. There are no contracts to sign at present, but we reserve the right to require contracts in the future.

Rate limits: Submissions are rate-limited by IP address. Upon request, WoSign will consider raising a submitter's rate limit, but WoSign reserves the right to decline such requests (if WoSign does not believe there is sufficient spare capacity) or to charge for this service in the future.

Reasonable Commercial Efforts: WoSign expects to be able to accept submissions for newly issued certificates, but WoSign asks that submitters refrain from submitting (to this log) large numbers of certificates that were not recently issued. WoSign reserves the right to remove (temporarily or permanently) any root from this log's list of accepted roots, without prior notice, if WoSign is unable to cope with the rate of submissions associated with that root.

Disclaimer: WoSign's CT Log is provided "AS-IS". The log is an aggregate of information from WoSign and third parties not under WoSign's control and, therefore, WoSign does not guarantee accuracy of information from third party sources or contributors. Further, WoSign does not guarantee the performance or availability to any end users of the log, whether to certification authorities or other submitters or to any parties or individuals desiring to read the status or the content of the log. We reserve the right to update this log policy from time to time.

WoSign operate following 3 CT log servers:

(1) is included in Chrome M54, which is hosted in China.

(2) is pending for Chrome inclusion, which is hosted in Los Angeles.

(3) is for other usage that don't apply for Chrome inclusion, which is hosted in China.

Contact us:

Phone: +86-755-8600 8688


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Addr: 502#, Block A, Shekou Technology Building 2, Nanshan District Shenzhen 518067, China