LEA cipher

a family of ARX lightweight block cipher

is widely used in resource-constrained environments. In this paper

we use the miss-in-the-middle technique to find 86 8-round zero-correlation distinguishers and 6 9-round zero-correlation distinguishers of LEA

and make use of the relationship between the zero-correlation distinguisher and the integral distinguisher to construct 5 8-round distinguishers and 1 9-round integral distinguishers. Based on 8-round integral distinguisher

integral attack on 10-round LEA-128 is implemented firstly by using the property of the key schedule and partial-sum technology

and the attack performs 2

120

10-round LEA-128 encryptions.Besides

the integral attack against 11-round LEA-1

92 with computational complexity of 2

185.02

11-round LEA-192 encryptions and the integral attack against 11-round LEA-256 with computational complexity of 2

248

11-round LEA-256 encryptions are implemented.