We've had a case in Australia of an ex-US forces pilot trainer arrested under extradition laws because he is said to have taught Chinese pilots how to land and take off from aircraft carriers.<p>Think about it for a minute: His one portable skill, the IPR behind doing a thing, a mechanical act, is deemed to be an ITAR risk. Knowing how to do it, is a weaponised concept in strategic planning.<p>And ask yourself: Can this apply to VLSI design smarts, or OpSEC, or DEVOPS?<p>I'm pretty sure at this stage, it applies to Cryptography so basically, be good at maths, you have no right (specifically right: you may be, you may not) to go and work in China.<p>It's been true for past knowledge of workplace. NSA (see above) and probably US forces (see the start) and I would suspect, other things too. If you worked at the FTC or department of state, don't try for a working holiday abroad without permission.