Germany wants to spy on suspects via Web Germany is proposing to use trojan horse software to enable surveillance of target computers. I have to wonder how effective this will actually be. They are talking about distributing it in an apparently official email from a government email address.

Now that the bad guys know this, it seems likely that they will take more care with the attachments from the government.
Anti-virus / anti-malware programs should be able to identify and block this software
If the anti-virus software makers are convinced to leave a hole for this software, it will be a huge back door for other hackers to use to deploy their trojan horse software.

In general this seems like a high risk operation for the Germans. I suspect that it will be used rarely and very selectively.