The application provides a multi-level
hash chain hybrid signature method and device, and belongs to the field of
digital signature. The method comprises the following steps: generating a unique
session ID and session context, reading a homologous
quantum root key; obtaining a PUF negotiation root key and deriving a PUF
session key; combining the unique
session ID, the session context and the homologous
quantum root key, performing a hash operation, and generating a unique session base key seed; performing heterogeneous splitting on an original signed message, and constructing a multi-level hidden salt
hash chain; performing grouping on two message fragments and the multi-level hidden salt
hash chain, performing compliance signature operation and post-
quantum signature operation on the grouped data respectively, generating an inner layer national secret signature, and generating an outer layer anti-quantum trusted signature; packaging the above data to generate a signature data packet, and sending the signature data packet to a signature
verification party. The application realizes the comprehensive goals of anti-quantum
security enhancement, hardware-level identity
traceability verification, national secret compliance signature
verification and multi-factor collaborative in-depth protection.