Type of encryption is used by Skype.

Dear SF-friends, someone had doubt about the type of encryption of Skype.
This is what I found. 

Skype uses AES (Advanced Encryption Standard) - also known as Rijndel -
which is also used by U.S. Government organizations to protect sensitive,
information. Skype uses 256-bit encryption, which has a total of 1.1 x 1077
possible keys, in order to actively encrypt the data in each Skype call or
instant message.

Fr. Gr. Eppo R. Kooi.