Author : Mr. Mallesh HL 1
Date of Publication :7th May 2016
Abstract: This paper proposes two-factor authentication for the data stored in the cloud with revocability option. In our system, sender sends an encrypted message to the receiver through cloud server. The sender needs to know only Identity of the receiver but no other information like public key or certificate etc. To decrypt a cipher text, the receiver should possess two things. First one is secret key of the receiver stored in the computer system and second one is some hardware device, which is unique, that is connected to the computer. Cipher text cannot be decrypted without having these two things. But if the hardware device like pen drive or USB device is lost or stolen, then cipher text can never be decrypted and this hardware device is cancelled to decrypt any cipher text. Our system is secure as well as practical. We can use a new hardware device to decrypt the cipher text together with the secret key.
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