1+0
0+0
0+1
1+1
(1+1)%2
1^1
1^0
0^1
0^0
c=7
k=10
c^k
fh_k=open('key','rb')
fullkey=fh_k.read()
len(fullkey)
fh_cl=open('test.pdf','rb')
cleartext=fh_cl.read()
len(cleartext)
ciphertext=[]
for i range(len(cleartext)):
for i in range(len(cleartext)):
  ciphertext.append(fullkey[i] ^ cleartext[i])
ciphertext
fh_ci=open('test.pdf.enc','wb')
fh_ci.write(bytes(ciphertext))
fh_ci.close()
fullkey[0]
cleartext[0]
fullkey[0]^cleartext[0]
142^fullkey[0]
quit()