Cryogenics is defined as the study of the production and behavior of an object at extremely low temperatures below -150°C and -240°F. This paper is about cryonics and it is very important to understand the difference between Cryonics and Cryogenics. So, as mentioned above Cryogenics is related to the study of materials at very low temperatures. But on the other hand cryonics deals with the keeping of a human body at extremely low temperatures. The idea of cryonics was first proposed in 1962. The Cryonic procedures start immediately after the heart failure of a person who has asked for cryopreservation of his corpse. However, it is illegal to perform cryonics on a person who is alive and that would be regarded as a murder or suicide. Cryonics can preserve a human body for a long time till some revival technique is developed in future. But there’s only one technology available to us today which can help in resurrection of a person who is legally dead in future. This is the Nanotechnology that can make it possible. But how can it be achieved by nanotechnology, that is discussed in this paper.