Hello,
I am taking a cryptography class and am having a tough time with an assignment
similar to this.
Given plain text message 1 and cipher 1 compute cipher 2 for message 2
Work flow will be:
- figure out the key
- use key to compute c2
So this is what I have so far and am getting nowhere fast. I could use a
little help on this one.
So my first step is to compute the key. I suspect my error below is because c1
is a float and m1 is a string but I don't know how to turn the string into a
float.
#### Python 2.7###
m1text="my test message"
print( m1text + ' in hex is ')
print m1text.encode("hex")
m1 = m1text.encode("hex")
c1=0x6c73d5240a948c86981bc294814d
k=m1^c1
print( 'the key = ' )
print hex(k)
This code yields the following:
my test message in hex is
6d792074657374206d657373616765
Traceback (most recent call last):
File "/media/.../Crypto/Attackv2.py", line 10, in <module>
k=m1^c1
TypeError: unsupported operand type(s) for ^: 'str' and 'long'
Any help is most appreciated.
Dave
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