It's not clear if it's permanent yet.

Tehran has a long history of controlling access to chat apps and social media. Signal doesn't want to take it.

The episode highlights the role that software and cybersecurity firms can quietly play in the violation of human rights.

The policy falls in line with the country's rules around its "Great Firewall.”

No one is quite sure what is coming from a Trump administration. Because of that, VPNs and other privacy software are seeing user spikes in following the…