I guess you have heard of Edward Snowden. Papers around the world published that the NSA invests much time, money and effort for a »full take« of the communication around the world.
Given this, it seems -- without too much knowledge of computers -- plausible, that people who invest large amounts of money in such actions could tend to force US based companies to implement a backdoor or some kind of trojan in their own software, in particular force Microsoft to implement a backdoor / trojan into Windows or SBS 2011.
You see, I'm a lawyer in Europe and I'm obliged by law to keep the secrets of my clients. I can breach the law simply by doing nothing, if action would be obviously necessary. Because my small law firm uses computers, I've got two questions:
Would such a backdoor / trojan make my computer accessible with administrator rights from outside, if the PC or server is connected to the internet, usually via router?
Would IT security professionals sooner or later become aware of such a backdoor / trojan and therefore its existence is really, really improbable?
Please take my apologies for asking such questions here. But I guess my question is being pondered by many people these days, who don't have your qualifications.
This question has been put on hold, because the regulars here, well, guessed, that answers would not been given on knowledge, but on opinion.
But the first answer (https://security.stackexchange.com/a/41515/30160) was good enough to give me a clue. And besides that, the Washington Post published a long article which confirmed the answer given by AJ_Henderson : A backdoor in Windows made by manufacturer etc. is improbable, because it would be noticed.
So the question now is:
Is there a way to find out, whether the encryption modules in Windows 7 and the Small Business Server 2011 deliver encrypted files or messages, which can be read by Microsoft, by using a kind of implemented key?
For Windows 8 there has been a hot discussion in Germany, see here: http://investmentwatchblog.com/leaked-german-government-warns-key-entities-not-to-use-windows-8-links-the-nsa/
And to ease the fear for stackexchange, that I'd spread the rumour there were a backdoor in the encryption of MS product: clearly I do not assume that; I just would like to know, whether there are hints in one or the other direction.