Definition
A routing attack targets the communication infrastructure on which a blockchain depends. In the usual internet-level meaning, it can involve misdirected routing announcements or an intermediary interfering with traffic. The blockchain’s cryptographic rules may remain intact while nodes struggle to exchange timely information. The term can also appear in payment-channel research with a different routing context, so the affected network layer should be stated explicitly.
How It Works
An internet routing disruption may separate groups of nodes, delay block delivery, or disturb connections between miners and pools. This can affect availability and the consistency of participants’ views, and may create opportunities for other attacks. It does not automatically reveal private keys or allow forged transactions to pass signature checks. Encrypted communication protects some data in transit but cannot by itself guarantee that packets reach their destination.
Key Considerations
Operators should consider diversity of providers and actual network paths, monitor unusual connectivity changes, and use suitable routing-security and resilience practices with their infrastructure providers. Many connections can still share one underlying dependency, so counting peers is not enough. Distinguish observed outages from confirmed malicious routing events and assess effects using multiple independent sources. Routing resilience complements consensus and software security; a well-validated blockchain can still be disrupted by failures below the protocol layer, while ordinary congestion is not necessarily evidence of a targeted attack.