一个基于openssl开发的安全通信软件，可实现消息发送方和接收方之间的安全通信，编程语言为C语言。-It s a openssl-based development of secure communications software that enables the message sender and receiver of secure communication ,programming languages is C language.

hash and mac algorithms are used for the confidentiality and integration of data sent over the network by sender to the receiver.

Cloud based re encryption. this uses el gamal re encryption procedure which uses a manager as intermediate between the owner of the file and the receiver of the file. File is send using java socket prgmg.

alamouti 2x1 with 2 transmitter and 1 receiver