'It currently appears that Cryptocat is the first and only encrypted chat application to be censored in Iran.' blog post says.
'Cryptocat's main objective is to provide easy to use, accessible private chat around the world. We will do everything we can to allow our users in Iran access to Cryptocat, along with the rest of the world.'
'We're doing the best we can, and we believe that Cryptocat offers legitimate privacy by employing impressive encryption measures.'