Losing Sky channels when using a non Sky box?

Some non Sky boxes can be used to read a Sky card, and access Sky channels.

However, it looks like Sky have increased their security, and there are rports that, as from yesterday, C4 and C4+1 on frequency 12480, the Irish regional variations, are no longer watchable on non Sky boxes.

This morning some reports are suggesting Sky 3 / Pick TV is also unavailable on non Sky boxes.

It looks like

Sky Cards to stop working on Non Sky (eg Darkbox and other multicam) receivers?

A few months ago I posted about this issue on some other forums and got shot down, however, recent reports say that Sky Italia, who use the same NDS encryption as Sky UK, have recently changed their encryption algorithm.

This has been done in an attempt to try restrict the use of their Sky subscription viewing cards in non sky boxes, and, more importantly, to try stop the card sharing networks