雪崩效应分析.txt

信息安全课上project,des算法的程序,不知道有没有用.

雪崩效应分析：
对下列的明文及相应的密文（M0 M1		C0 C1）
R1:	1111111111111111111111111111111111111111111111111111111111111111 11111     	1110111100101111101110100000110011001100010011000101110101111001  1110000010100111010011011001100100110111100011010001000000110010
R2:	0111111111111111111111111111111111111111111111111111111111111111 11111  	1010110000100000010011001010000000010011110111101111100001000111  0100001001100000000100000101000100110001100010010001100101100001
R3:	0110111111111111111111111111111111111111111111111111111111111111 11111  	1011011101110101010001011010101010101000011101110110110000110001  0111010111101110100011111001010011001111110010100011101000110000
R4:	0110110111111111111111111111111111111111111111111111111111111111 11111  	1100011001011111000111101001111100110011110001001000000000110101  0010100001100101101011001111000000011110101001010101000011100110
R5:	0110110110111111111111111111111111111111111111111111111111111111 11111 		1000111011011011000101001001101100000011011001011000101000110010  0101111001111101100110110101110100110111000011000011101011001001
R6:	0110110110110111111111111111111111111111111111111111111111111111 11111  	1001000101001001100001111000110111010011001001110001010110001100  1111010111100101100111011000101110100000110001110000000010111111
R7:	0110110110110110111111111111111111111111111111111111111111111111 11111  	1001100000001100000001111011011111010101100001111100001101111100  1101100110100101100111100110110110010101000011010100000001000101
R8:	0110110110110110111011111111111111111111111111111111111111111111 11111  	0010000100101100011000011011011100010101111101010100001101010110  0001001100010011101111111111100100100010001010011100101111000111
R9:	0110110110110110111011101111111111111111111111111111111111111111 11111  	0010000010000010110110000010010101101101100010111000111101100101  1001000111111010100111111011011011110010010001110110100010110000
R10:	0110110110110110111011101111011111111111111111111111111111111111 11111  	0101000000011111100101010110111000110001010000010110000100101100  1110100010000010100001011000100100000100100110100100000000000101
R11:	0110110110110110111011101111011110111111111111111111111111111111 11111  	0010000101110101110110100100110110001011110100000101000011100111  1100111011011100110110110001100001011101010000110011011010011100
R12:	0110110110110110111011101111011110111101111111111111111111111111 11111  	1001011110010111011010011100110011110111110011110010111001101100  0010010101000111101110011100111011111111100000111000011011100101
R13:	0110110110110110111011101111011110111101111011111111111111111111 11111  	0111111101000111110000111110110010101011111010101010110111000101  0000010111101011110101000011100011111000001011111101000111100100
R14:	0110110110110110111011101111011110111101111011110111111111111111 11111  	1011001000011101101001000001110110000011111100000110001111000100  0011010011010010000001100000110111010001011000111011011101100101
R15:	0110110110110110111011101111011110111101111011110111110111111111 11111  	0100011011110110000110110010110011100001000010111010111010011110  1001110111110110000011110011100100101010111110100100010101101011
R16:	0110110110110110111011101111011110111101111011110111110111110111 11111  	0100011001110000110011010011111101100001100010110000011000000010  0000111100011100111111011100101100100011010101110001000100110100
 
上下相邻的明文只在M0中有一位不同，M1的密文是相同的，经加密后上下相邻的密文对应位不同的总数如下：
 	 C0	C1
R1  R2 	 36	25
R2  R3 	 30	35
R3  R4 	 32	34
R4  R5 	 17	33
R5  R6 	 32	34
R6  R7 	 23	26
R7  R8 	 20	28
R8  R9 	 32	31
R9  R10  33	37
R10 R11	 32	34
R11 R12	 36	32
R12 R13	 26	29
R13 R14	 30	27
R14 R15	 40	30
R15 R16	 20	34

由于雪崩效应，相同的M1经加密后有很大的不同！！