BGP Attestation Tokens for Routing Integrity Verification

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Solution Overview

Problem

Network nodes in BGP routing protocols can be compromised by attackers, allowing them to tamper with sensitive information, and existing security measures are inadequate to ensure the integrity of data transmission.

Innovation Solution

Implement attestation using a canary stamp or token based on Trusted Platform Module (TPM) measurements, appended to BGP keepalive and update messages to verify the trustworthiness of network nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional BGP routing protocol is used without attestation, then network operation simplicity is maintained, but network security and data integrity are compromised

Engineering Contradiction:

Improvenetwork securityVSAvoidprotocol complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces an intermediary attestation mechanism that mediates between BGP routing operations and security verification. The attestation token acts as a mediator that carries trust information from the routing device without requiring fundamental changes to BGP protocol operations, thus improving security while maintaining protocol simplicity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The security verification function is segmented from the main BGP routing protocol. The attestation token is a separate, independent component that can be appended to BGP messages without modifying the core routing logic. This segmentation allows security enhancements to be added modularly, reducing the perceived complexity increase.

Inventive Principle:

Principle #1Segmentation

2Reliability

If attestation tokens are appended to all BGP messages, then data integrity is enhanced, but message transmission overhead increases

Engineering Contradiction:

Improvedata integrityVSAvoidmessage size

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Instead of requiring attestation on every single BGP message, the patent applies attestation selectively to critical routing messages where integrity is most important. This partial application approach ensures data integrity for key operations while avoiding the overhead of attesting every message, thus balancing security enhancement with transmission efficiency.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If existing BGP security measures are used, then basic protection is provided, but they are inadequate to prevent node compromise and data tampering

Engineering Contradiction:

Improvesecurity effectivenessVSAvoidsecurity mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical security measures (such as manual configuration, basic authentication) with a cryptographic attestation mechanism. The attestation token uses cryptographic signatures to provide automated, verifiable proof of device integrity and message authenticity, significantly improving security effectiveness while the automation reduces operational complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4727066A2Applying attestation to the border gateway protocol (BGP)

Publication Date: 2026.04.15 CISCO TECHNOLOGY INC

Figure 1
Figure 2A~2D
Figure 3A~3B

AI summary

In one embodiment, a method by an apparatus of a Border Gateway Protocol (BGP) network includes accessing an attestation token for the apparatus. The method further includes encoding the attestation token in a BGP signaling message. The method further includes sending the BGP signaling message with the encoded attestation token to a second apparatus of the BGP network.