Improved differential fault and brute force combining attack on SMS4
Geng Qiao-ke · Jisuanji gongcheng yu sheji · 2009
On the security of SMS4 against differential fault and brute force combined attack is researched.With a kind of fault model,simplified differential fault attack and brute force attack are together used to crack SMS4 cipher.It takes less than one minute to recover a 128-bit key of SMS4 by experiment.So a conclusion is made in the final that it is difficult for SMS4 to avoid the kind of combined attack.To improve the security of SMS4,the encryption operations should be protected.