CoCalc Public FilesDES.sagewsOpen with one click!
Authors: Liljana Babinkostova, Charles Burnell, William Unger
Views : 84
Compute Environment: Ubuntu 20.04 (Default)
key="110110010" message="101010110101" BDESoneRound(message,key,4)
10010110 '110101101110'
key = "010011001" EightBitsKey(key,2)
00110010 '00110010'
key="110110010" message="101010110101" L0 = Ln(message) R0 = Rn(message) ER0 = Expander(R0) k1= EightBitsKey(key,0) SboxInputs=XORnbits(ER0,k1,8) L0 R0 ER0 k1 SboxInputs
11011001 '101010' '110101' '11101001' '11011001' '00110000'
test ={"0110" : "111", "1110" : "101", "0000" : "101", "1001" : "100", "1100" : "000", "0010" : "001", "0111" : "000", "1111" : "011", "1010" : "110", "0100" : "011", "0101" : "100", "1101" : "111", "0001" : "010", "1000" : "001", "1011" : "010", "0011" : "110"}
test['0110']
'111'
key="110011101" message="101010110101" Encr=BDES(message,key,6) out = BDESdecr(Encr,key,6) out==message out
True
6f48f8f1-59f6-4509-a878-1bd5f63326ad k1="000000000" k2="111111111" DoubleBDES("110101010010",k1,k2,512)
110101010010 66
numcorrect=0 numwrong=0 for i in xrange(0,(2^9)): #key="110011101" key =format(i, '#011b') message="101010110101" Encr=BDES(message,key,6) out = BDESdecr(Encr,key,6) if out!=message: print key numwrong+=1 else: numcorrect+=1 numcorrect numwrong