Research On Fault Sensitivity Analysis And Defensive Countermeasures Of AES Cipher Circuit

With the rapid development of information technology,information security has become an important issue of concern to people.The cryptographic circuit is the guarantee of information security,and the cryptographic algorithm is the cornerstone of the circuit.The AES algorithm is widely used in the field of information security due to its high security and low resource consumption.Side Chanel Attack is the most convenient and effective type of cryptanalysis technology at present.In recent years,the rapid development of a Side Chanel Attack method,Fault Sensitivity Analysis(FSA),can attack a variety of traditional defensive countermeasures and have caused a great threat to the security of the cryptographic circuit.Therefore,the research on FSA and defensive countermeasures of AES cipher circuit is of great significance.The main work of this paper is to study three kinds of FSA including Hamming weight Fault Sensitivity Analysis(HW-FSA),Collision Fault Sensitivity Analysis(CFSA)and Zero-value Fault Sensitivity Analysis(ZFSA)of AES circuit,and propose corresponding defensive countermeasure to design a safe and reliable AES circuit.First of all,in order to provide an experimental basis for the research of FSA attack and its defensive countermeasure,based on the basic principles of FSA,using ISE development tools and SAKURA-G development board,a FSA simulation platform was constructed and successfully attacked PPRM1-AES and mask AES,which are the typical circuit for research of FSA.Then,for the challenge that traditional defensive countermeasure of Fault Attack cannot basically defend HW-FSA and CFSA at the same time,a random parallel hybrid S-box AES circuit structure based on the design of four composite domain mask S-boxes is proposed for joint defense by disrupting the similarity of fault sensitivity features between S-boxes and increasing the difficulty of the acquisition of the fault sensitivity.Then,aiming at the problem of narrow attack range and low efficiency of ZFSA,an efficient ZFSA for 8bit AES circuit is proposed based on the zero-value characteristics of composite S-box and the structure of 8bit AES circuit.Finally,in order to make up for the ZFSA attack vulnerability of the AES circuit,a random delay circuit structure based on zero-value detection is designed to defend ZFSA by randomly increasing the circuit delay of the S-box at zero input to damage the ZFSA implementation.Based on the proposed FSA simulation platform,both the HW-FSA and CFSA attacks on the random parallel hybrid S-box AES circuit cannot obtain the correct key information,indicating that the proposed joint defense measure is effective.Using the efficient ZFSA attack method proposed in this paper to attack 8bit AES circuit,we only need 256 × 256 plaintext encryption and correct rate statistics to recover all the keys without complicated calculation,which verifies the feasibility and efficiency of attack methods.Finally,the ZFSA attack on random delay AES circuit based on zero-value detection shows that it has the ability of resisting ZFSA attack.