> The 2000 R.I.P. Act supposedly made it illegal to withhold a requested key to protected (encrypted) information. However, to my knowledge this is untested in court.

To add a data point; we have seen this used several times, always successfully admissible.

Being somewhat on the firing line and seeing the results I find it quite hard to find it a bad law.

I love the UK's inherent right to silence; it's one of the things I still find truly wonderful about my country. But in the case of RIPA my opinion is in reverse :)