“Later on Thursday, an executive with a better-known provider of secure email said his company had also shut down that service. Jon Callas, co-founder of Silent Circle Inc, said on Twitter and in a blog post that Silent Circle had ended Silent Mail. ‘We see the writing the wall, and we have decided that it is best for us to shut down Silent Mail now. We have not received subpoenas, warrants, security letters, or anything else by any government, and this is why we are acting now,’ Mr Callas wrote. Silent Circle, co-founded by the PGP cryptography inventor Phil Zimmermann, will continue to offer secure texting and secure phone calls.”
