On The Novel Techniques Of Differential Power Analysis On Block Cipher Circuits

Recently, the development and sophistication of integrated circuittechnology have paved the way for the wide application of embeddedsystems in daily life. With the increasing popularity of embedded systems, itssecurity is receiving concern from more and more people. Especially in thepast ten years, the emergence and development of side channel attack havecast a shadow on it. Power analysis is a side channel attack that caneffectively break cryptographic devices and retrieve the secret keys. Unlikethe brute force attack and conventional cryptanalysis, power analysis exploitsthe runtime power consumption of the devices, which has a low-cost,high-effect and is difficult to prevent.This paper studies new techniques in differential power analysis againstblock cipher circuit. Firstly, we propose an approach to apply the idea ofCorrelation Power Analysis (CPA) to PRINTcipher, a newly presented blockcipher. On this basis, we find a security problem of its design, and hencepropose a new attack–Front-Tail Enhancement, which takes advantage ofthe identical round keys of PRINTcipher, and can greatly improve the effectof power analysis attack. Secondly, we study the power characteristics ofcombinational logic of the circuit. We propose two power models to depict itspower characteristics and demonstrate how to use such power models toconduct correlation power analysis against PRINTcipher. We conductsimulated experiments to verify our power models and compare the resultswith that of CPA. Our experiments prove the feasibility of our power models.