To put a lid on bloggers’ speculation about police getting “backdoors” to Windows security, Microsoft is starting to hush up on the subject. In an e-mail to BetaNews on Friday, a spokesperson described COFEE as a “customizable framework.” Despite releasing a few more facts on Friday about a controversial new tool for police officers, Microsoft has now vowed to stay mum on the “exact methods” used by COFEE (Computer Online Forensic Evidence Extractor), as well as about what kinds of passwords – OS or network, for example – COFEE might be able to crack…