Prominent cryptographers Adi Shamir and Ross J. Anderson were both denied visas to travel to the US (for a conference and a book awards ceremony respectively). In Bruce Schneier mentions "two other prominent cryptographers who are in the same boat". Odd and troubling.

For more on Shamir and Anderson see and

@11011110 on our last family trip to US, to Berkeley, on J1 visas, the embassy in London insisted on interviewing our, at that time not even 3 y.o. son, in person. And us being non-dodgy EU citizens, who went to US many times, and my wife not just visited, but did a PhD in Princeton... These admin screwups smell of utter incompetence and over-bureaucratisation of the system.

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