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*** DEMONSTRATION HOW AN ADDRESS GETS COMPROMISED                       *** 
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A. Initial situation:
   Alice wallet
   address 0: 500  

B. Bob and Eve both wants to pay Alice 2500 IOTA.

C. Alice gives address 1 to both Bob and Eve and does not attach address 1 to the Tangle.
   Alice wallet
   address 0: 500  
   address 1: not attached to Tangle

   In this step Alice makes two mistakes:
   - Alice should create 2 addresses (address 1 for Bob and address 2 for Eve) 
     and both addresses should be attached to the Tangle.

D. Alice sends 100 IOTA to Charlie
   Alice wallet
   address 0: 0  
   address 1: 400 

   Note: 
   - Because address 1 was not attached, it is used for the unspent 400 IOTA.

E. Alice sends 100 IOTA to Dave
   Alice wallet
   address 0: 0  
   address 1: 0
   address 2: 300

   Note: 
   - 100 IOTA is sent from address 1, 50% of address 1 private key (randomly) 
     is revealed. 

F. Bob sends 2500 IOTA to Alice using address 1
   Alice wallet
   address 0: 0  
   address 1: 2500
   address 2: 300

G. Alice sends 100 IOTA to Karl
   Alice wallet
   address 0: 0  
   address 1: 0
   address 2: 300
   address 3: 2400

   Note:
   - Again 100 IOTA is sent from address 1, and again 50% of address 1 private key 
     (randomly) is revealed. 
   - Address 1 is used twice for outgoing transactions, step E and step G.
     Address 1 is now compromised. 

H. Eve sends 2500 IOTA to Alice using address 1, while Alice goes on holiday.
   Alice wallet
   address 0: 0  
   address 1: 2500
   address 2: 300
   address 3: 2400

   Note:
   - In step G, address 1 was compromised and now address 1 has a balance.
   - By brute force computing hackers can try to find the complete private key and thus 
     stealing the tokens from address 1.
   - There is no 100% guarantee that the hacker will succeed, it all depends on how much 
     of the private key is revealed and the computer power used.
   - The seed and other addresses are SAVE. Only address 1 is compromised.