Hexadecimal suele ser de las primeras cosas que uno aprende cuando se mete en la informatica, uno aprende binario, octal, hexadecimal ... etc ... con hexadecimal es una buena tecnica de encriptar mensajes y nadie lo sabra amenos de que conozca el valor de las letras en Hexa.
El Siguiente Problema (sencillo) lo propuso MATE :
41 6e 64 20 74 68 65 72 65 27 73 20 6e 6f 20 6f 6e 65 20 65 6c 73 65 0d 0a 54 68 61 74 20 6b 6e 6f 77 73 20 6d 65 0d 0a 4c 69 6b 65 20 79 6f 75 20 64 6f 0d 0a 57 68 61 74 20 49 27 76 65 20 64 6f 6e 65 0d 0a 59 6f 75 27 76 65 20 64 6f 6e 65 20 74 6f 6f 0d 0a 54 68 65 20 77 61 6c 6c 73 20 49 0d 0a 48 69 64 65 20 62 65 68 69 6e 64 0d 0a 59 6f 75 20 77 61 6c 6b 20 74 68 72 6f 75 67 68 0d 0a 59 6f 75 20 6a 75 73 74 20 77 61 6c 6b 20 74 68 72 6f 75 67 68
que podra ser ... Con el siguiente codigo en Python decodifique lo que MATE escribio :
lits_up =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t'
,'u','v','w','x','y','z']
lits_lo =
['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t'
,'u','v','w','x','y','z']
def convert(lit):
num =0
if lit=='1': num = 1
elif lit=='2' : num = 2
elif lit=='3' : num = 3
elif lit=='4' : num = 4
elif lit=='5' : num = 5
elif lit=='6' : num = 6
elif lit=='7' : num = 7
elif lit=='8' : num = 8
elif lit=='9' : num = 9
elif lit=='a' : num = 10
elif lit=='b' : num = 11
elif lit=='c' : num = 12
elif lit=='d' : num = 13
elif lit=='e' : num = 14
elif lit=='f' : num = 15
return num
def transform(num):
lit = ""
if num >= 65 and num <= 90:
start = 65
for up in lits_up:
if num == start:
lit = up.upper()
start = start + 1
elif num >=97 and num <=122:
start = 97
for lo in lits_lo:
if num==start:
lit = lo
break
start = start + 1
else : lit = " "
return lit
#lower 97 - 122
#upper 65 - 90
alldata = "41 6e 64 20 74 68 65 72 65 27 73 20 6e 6f 20 6f 6e 65 20 65 6c 73 65
0d 0a 54 68 61 74 20 6b 6e 6f 77 73 20 6d 65 0d 0a 4c 69 6b 65 20 79 6f 75 20 64
6f 0d 0a 57 68 61 74 20 49 27 76 65 20 64 6f 6e 65 0d 0a 59 6f 75 27 76 65 20 64
6f 6e 65 20 74 6f 6f 0d 0a 54 68 65 20 77 61 6c 6c 73 20 49 0d 0a 48 69 64 65 20
62 65 68 69 6e 64 0d 0a 59 6f 75 20 77 61 6c 6b 20 74 68 72 6f 75 67 68 0d 0a 59
6f 75 20 6a 75 73 74 20 77 61 6c 6b 20 74 68 72 6f 75 67 68"
data = alldata.split(" ")
res = ""
for d in data:
ret = (convert(d[0])*16)+convert(d[1])
res += transform(ret)
print res
Y he aqui el mensaje que el queria darnos :
And there s no one else That knows me Like you do What I ve done You ve done too The walls I Hide behind You walk through You just walk through
NeoPathIC
Agustin Ramos Escalante
