Differential Fault Attacks on Privacy Protocols Friendly Symmetric-Key Primitives: RAIN and HERA

Algorithm 1

DFA on RAIN.

1: Collect the normal ciphertext for an unknown key on .

2: Inject one-bit fault at a random position in the register of the state

3: Collect the faulty ciphertext for the same key and public parameters

4: fordo

5:  Construct a system of Boolean equations involving the key as unknown variables based on the normal ciphertext and the corresponding faulty ciphertexts

6:  Solve this system of equations for solution

7:  ifthen

8:   return;

9:  end if

10: end for