not to bring end—to—end encryption services to their messaging services like facebook messenger and instagram direct messenger. formerly the ceo of the national cyber security centre, ciaran martin says he thinks the government's got it wrong on this issue. encryption has been a source of tension between government and the tech industry. end—to—end encryption is a specific form where, unlike in previous forms of encryption, there is no actual key. so, historically, you could go to a provider of a communication service, whether it's post or high—end internet communications, you can serve a warrant and say "we need access to this." with end—to—end encryption, the company can say "there is no way of giving you that access." so privacy campaigners and many in the tech industry will say this is a very good thing, because it means that hackers, hostile foreign governments and so forth, cannot get at these types of communications.