An anonymous reader writes: Google Chrome will make certificate transparency obligatory for domains issued from October 2017. The announcement, by Google software engineer Ryan Sleevi, makes clear that the Chrome team will extend all necessary help to certificating authorities to prepare them for compliance in the next twelve months. 'Although the date is a year away, we encourage any participants that wish to have their use cases addressed to bring them forward as soon as possible during the next three months. This will ensure that the IETF, the CA/Browser Forum, and the broader community at large have ample time to discuss the challenges that may be faced, and find appropriate solutions for them.' The Certificate Transparency open framework, which has been criticized over privacy aspects, uses logs to which information can only be appended (not removed or altered) to provide an authentic chain of trust which is capable of detecting compromised certificates in hours rather than the days, weeks or months involved in traditional propagation.