Abstract: 􀀁 Recently, Chen etc. propo sed a no vel self􀀁 adaptive image encryption algorithm. The analysis shows that it is vul􀀁 nerable to chosen plaintext attack. Then the original algorithm is revised based on self􀀁 adaptive image encryptoin technique. The ex􀀁 periments show that the revised algorithm has better performance on both security and speed than two known algorithms. Key words: 􀀁 cryptography image encryption self􀀁 adaptive cryptanalysis1

RangeKutta\fda.m
..........\FRK.m
..........\rdk4.m
..........\RK.m
..........\rk4.m
..........\rk42.m
..........\rk43.m
..........\RK4a.m
..........\rks4.m
..........\RK_sigle_step.m
..........\Rungkuta4.m
RangeKutta

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