Obama is not pursuing a backdoor to commercial encryption. As we all know, it was a stupid idea in the first place. We can’t afford to sigh in relief, though: this ain’t over.
For one thing, the FBI is still pushing for it, as are roughly comparable agencies in other countries, such as here in the UK. Also in the UK, David Cameron is still very much in favour of the idea; he seems to have been spurred on by Obama’s previous support but Obama’s withdrawal doesn’t seem to have cooled his ardour. Not a surprise; he can hardly be seen to be copying the US.
It doesn’t matter anyway. This is going to come up again and again, probably until it’s finally implemented in the US. I wouldn’t be surprised if the UK went ahead and did it regardless.
This is something that needs to be addressed at a constitutional level. It’s about our right to have secrets.