Blockchain-Based DNS Root Zone Management Decentralization for Internet of Things

Algorithm 2. DelegateVerification().

Input:

  CurDelegationTxn

Output:

  bool

1: if CurDelegationTxn has invalid field value then

2:  return false

3: end if

4: if prevtx !=; then

5:  verify_key = prevtx.AuthKey

6:  sig = CurDelegationTxn.Signature

7:  if VeriSig(verify_key, sig) != true then

8:   return false

9:  end if

10:  / validity period of prevtx needs to cover the validity period of CurDelegationTxn /

11:  if prevtx.ValidFrom < CurDelegationTxn.ValidFrom or prevtx.ValidTo > CurDelegationTxn.ValidTo then

12:    return false

13:  end if

14:  if op_type == Transition or Revocation then

15:    if ConfirmOPs of CurDelegationTxn do not satisfy prevtx.TransitionPolicy/RevocationPolicy then

16:    return false

17:   end if

18:  end if

19:  if op_type == RenewalPolicy then

20:   if CurDelegationTxn.TimeStamp - prevtx.TimeStamp > prevtx.RenewalGracePeriod then

21:    return false

22: end if

23: end if

24: if op_type == RedemptionPolicy then

25:    if (ConfirmOPs of CurDelegationTxn do not satisfy prevtx.RedemptionPolicy) or (CurDelegationTxn.TimeStamp - prevtx.TimeStamp > prevtx.RedemptionGracePeriod) then

26:    return false

27:   end if

28:  end if

29:  DelegationVerification(prevtx)

30: end if

31: return true

Algorithm 2. DelegateVerification().