Just for information, here is a link about RC4 CryptoAPI Encrypted Summary Stream used for http://msdn.microsoft.com/en-us/library/dd943321%28v=office.12%29.aspx (link given by this: http://msdn.microsoft.com/en-us/library/dd909022%28v=office.12%29.aspx and so for Powerpoint files)
Just for information, here is a link about RC4 CryptoAPI Encrypted Summary Stream used for msdn.microsoft. com/en- us/library/ dd943321% 28v=office. 12%29.aspx msdn.microsoft. com/en- us/library/ dd909022% 28v=office. 12%29.aspx and so for Powerpoint files)
http://
(link given by this: http://