It does depend. This may be leftover behavior from my contract days, but I've always had at least one key per entity with which I interact[1]. The reasoning is

It does depend. This may be leftover behavior from my contract days, but I've always had at least one key per entity with which I interact[1]. The reasoning is that it is far easier for me (or the entity, but that's a bit different) to delete one keyfile to sever access than it is for me to rekey everything else. I don't want access to things I'm not actively engaged with - compromises happen, even to engineers' laptops, and that conversation with former employers is too much like calling up your exes to tell them about a VD test result for my comfort. As far as it being digital identification, lots of companies have IDs separate from your DL/passport. This is usually because the company ID provides access to something your other ID doesn't. Same principle. [1] There are lots reasons to have lots of different keys, and only having one per entity is pretty rare for me.