[fspeech]

This doesn't prevent the other end from being surveilled, if indeed the signal is being intercepted. Similarly, keeping his phone malware free doesn't solve the problem of his friends' phones getting compromised. So without both ends on a secure line there is no real good way to secure things. Those listening in, as suggested by the paper, do not necessarily need to intercept every call. Sure they would love to listen in on every call, but it is not necessary if they just want to get a better model of how he thinks.