Apple has triumphed over an effort from the U.K. government to keep details secret of its appeal against an order to create a “backdoor” to iPhone users’ data.

The U.K.’s Investigatory Powers Tribunal on Monday published a ruling dismissing the government’s attempt to prevent details from a hearing on the appeal from being made public. The government had tried to keep the information secret on the grounds it posed risks to national security.

Judges Rabinder Singh and Judge Jeremy Johnson said in their ruling that the U.K. government’s request to keep details of the hearing private “would be the most fundamental interference with the principle of open justice.”