Detectable, Traceable, and Manageable Blockchain Technologies BHE: An Attack Scheme against Bitcoin P2P Network

Algorithm 2

Selectively deleting TCP handshaking packets forces the victim node to establish an outgoing connection to the victim node.

Input: S = [pkt1…]: hijacked network packets. P: the set of malicious IP prefixes. dp: the ip of victim node

1: for pkt ∈ S do

2:  if pkt.ipSrc=dp and pkt.dport=8333 and pkt.payload=SYC then

3:   ipStr ←‘ ’

4:   ipStr ← Prefix(pkt.ipDst)

5:   if ipStr in P then

6:   success(pkt)

7:  else

8:   drop(pkt)

9:   end if

10:  else if pkt.ipDst=dp and pkt.sport=8333 and pkt.payload=SYC_ACK then

11:  drop(pkt)

12: else

13:  send(pkt)

14: end if

15: end for