Hybrid cryptographic technique using OTP:RSA
Karthik Karthik, Chinnasamy, Perumalsamy Deepalakshmi · 2017
Communication plays a vital role in our day to day life for sharing the data. The data must be confidential and protected. Protecting the information is very important during communication because it is shared over the internet. This causes accessing of information by the unauthorized interceptors. Cryptography plays a major part in tools of security. It is a method that changes plain message into cipher form. In cloud computing, most of the researchers used the technique of either Symmetric key encryption or asymmetric encryption. In this paper a hybrid technique of using both Symmetric-key and Asymmetric-key algorithm is implemented to give strong security. Initially the original data is enciphered by OTP and the OTP keys are enciphered with RSA after that the encrypted key of OTP by RSA will be stored in the cloud. The receiver has to decrypt the encrypted OTP key first then the request for getting data encrypted with OTP is sent to the sender. The sender analyzes the user information and sends the encrypted data (with OTP) to the cloud with life span. The receiver gets the encrypted data and decrypted it using the already received key. If the receiver failed to retrieve the data within a life span period then he/she has to request again. Outcome of this method provides a better protection. Also the time taken to encipher the data is quicker than the already existing method. The attack of brute force is impossible for this method.