  The internet of things refers to the network of devices connected to the
internet and can communicate with each other. The term things is to refer
non-conventional devices that are usually not connected to the internet. The
network of such devices or things is growing at an enormous rate. The security
and privacy of the data flowing through these things is a major concern. The
devices are low powered and the conventional encryption algorithms are not
suitable to be employed on these devices. In this correspondence a survey of
the contemporary lightweight encryption algorithms suitable for use in the IoT
environment has been presented.
