Cryptology plays a crucial role in cyber security. There could be use of sign language and different cypher code to encrypt the sensitive data. The decipher mechanism helps to decode the message. In ancient times, Julius Caesar used to send his secret messages to his army in cypher code. Later this process is followed by Germans during the Second World War. In modern organizational context, cyber security is the most important parameter. So, to protect organizational data they can adopt cryptology to encrypt their data and hide them from the normal visibility level. The reader can go through the article written by Mark Ward (Technology correspondent, BBC News) and understand more about cypher process and the levels of challenges at:
http://www.bbc.com/news/technology-34312697