Security is the most important issue on the internet and day to day applications because they are growing fast. So the significance and the value of the exchanged information over the internet or other media types are increasing. Data Security is an important concern in smart city. When a person communicates with other person then data transfer should be secured. It can be achieved through encryption algorithms which are used to prevent unauthorized access of data. So, now we have to use some methods to ensure that information is hidden from anyone who it is not intended to see the data. The better solution to deal with this problems against the data attackers is cryptography. Cryptography is the study of hiding knowledge about thedata. Cryptography is the one of the main type of computer security that translates information from its normal form into an expressionless form by using Encryption and Decryption Techniques. It ensures that message should be sent without any modification to the receiver. So, in this paper I have implemented various algorithms of cryptography to ensure the secret communication in smart city. Thispaper deals with various parameters such as variable key length, memory utilization, execution time in order to compare various algorithms of Cryptography.
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