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Due to the lack of the mechanism within BGP to verify the authority of an Autonomous System (AS) to announce Network Layer Reachable Information (NLRI), a specific IP prefix may be hijacked by a suspicious AS, leading to Internet instability even crash. Current proposals which adopt assignment attestations to guarantee validity of each step on address assignment path and an authorization attestation to guarantee that an AS is authorized to announce a prefix by an organization, are vulnerable to a prefix hijacking called "Malicious Service Provider (MSP)", because these proposals only ensure that an AS is authorized to announce a prefix by one of subscribing organizations in the assignment path of the prefix, not the last subscribing organization.
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