Ordered Multisignatures and Identity-Based Sequential Aggregate Signatures, With Applications to Secure Routing
The authors construct two new multiparty digital signature schemes that allow multiple signers to sequentially produce a compact, fixed-length signature. First, the authors introduce a new primitive that the authors call Ordered MultiSignatures (OMS), which allows signers to attest to a common message as well as the order in which they signed. The OMS construction substantially improves computational efficiency and scalability over any existing scheme with suitable functionality. Second, the authors design a new identity-based sequential aggregate signature scheme, where signers can attest to different messages and signature verification does not require knowledge of traditional public keys.