Research On Ciphertext-Only Fault Analysis Of The Lightweight Block Ciphers

With the rapid development of information technology and computer technology,the third revolution of the Internet of Things has gradually penetrated into all areas of our life.Due to the limited computing resource of the Internet of Things,traditional cryptographic algorithms can not solve the security problems in this field,so the lightweight block cipher algorithm has emerged.The lightweight block cipher has high execution efficiency,low resource consumption,low throughput and high efficiency in hardware and software implementation,and also plays an important role in the security field of the Internet of Things.Therefore,its security analysis has become the mainstream of cryptography research.Fault analysis is often applied to the security analysis of cryptographic algorithms.It uses physical methods such as microwave radiation,laser illumination,and eddy current magnetic field to change the normal encryption process to obtain erroneous results.The ciphertext-only fault analysis is the only existing technology that attacks the cryptographic algorithm in the ciphertext condition,it can get the correct main key by injecting the fault.The lightweight cipher LBlock was proposed at ANCS in 2011.There is no official research on ciphertext-only fault analysis for the Feistel structure based on the cryptographic algorithms.In this paper,we propose a new ciphertext-only fault analysis for LBlock cipher by injecting faults,and the algorithm is analyzed by six distinguishers in the last but three rounds.In this paper,in addition to the original distinguishers as SEI,GF,GF-SEI,MLE,we propose the GF-MLE and MLE-SEI distinguishers as new distinguishers.The simulation experiment shows that the secret key can be recovered with over 99% success probability in a short period of time,and the new distinguishers can not only improve the attacking efficiency,but also decrease the number of faults.This shows that the ciphertext-only fault analysis poses a great threat to the security of LBlock cipher.It provides an important reference for the security analysis of other lightweight block ciphers.The lightweight cipher SIMON with the Feistel structure was proposed by the National Security Agency in 2013.In this paper,we propose a ciphertext-only fault analysis for SIMON cipher by injecting a random nibble fault,in addition to the 6 distinguishers which used in LBlock cipher,we propose the GF-MAP,HW-MLE,GF-HW and HW-MAP distinguishers as new distinguishers to recover the secret key.The research shows that the SIMON cipher can not resist the ciphertext-only fault attack,and provides an important reference for other similar structure block ciphers.In this paper,the security analysis of LBlock cipher and SIMON cipher against ciphertext-only fault attack is carried out,which provides an important reference for block ciphers of ciphertextonly fault attack.