May 1, 2013 - CopyTele, a non-practicing entity that monetizes and enforces patents, filed a patent lawsuit against Microsoft over the alleged infringement of two patents. CopyTele claims that Skype, which is owned by Microsoft, infringes two patents related to Web-based secure peer-to-peer communications.
The two patents-at-suit are a "Method and apparatus for securing e-mail attachments" and "Portable telecommunication security device." Both patents issued in 2005.