Side-Channel Attacks and Countermeasures for Identity-Based Cryptographic Algorithm SM9

Algorithm 5

Fault attack on SM9.

Input: SM9 system parameters, message .

Output:  .

Calculate the correct signature value .

Inject fault on and denote as .

Calculate the wrong signature value .

Calculate .

Calculate .

Establish equations of and .

  for   to 255 do

 Compute by .

  end for

  Calculate by and verify and .

  return