Optimization of IDEA Key-Schedule Algorithm for Safe Use in Cloud
Masoud Rafighi, NaghmeMoatazedi · International Journal of Engineering and Technology · 2017
Nowadays, thanks to its significant advantages, cloud computing is one of the most attractive modern technologies which is mostly used for data storage.Cloud storage servers are targeted by various attacks which are neutralized with various methods including encryption which is the most used method for protecting information.IDEA encryption algorithm introduced in 1990 is a public key algorithm which only uses cyclic changing of a secret key in its own key schedule to generate sub-keysand therefore is very weak.In this paper, we tried to improve the security of IDEA key-schedule by utilizing the strengths of Twofish and Blowfish key-schedule algorithmsand then evaluated the new algorithm, named TB-IDEA, using CT1software.