Cross-node data transmission method and related apparatus

A method, applied to a sending node in a decentralized network, wherein the decentralized network further comprise at least one adjacent node of the sending node, and the method comprises:

• after the sending node completes neighbor discovery with an adjacent node, sending, by the sending node, a route flooding message to the adjacent node, wherein the route flooding message carries unidirectional node authentication information and challenge information, for the adjacent node to perform, based on the unidirectional node authentication information, authentication on the route flooding message sent by the adjacent node, to obtain an authentication result;
• in response to determining that the authentication result is that the route flooding message is sent by the sending node, establishing, by the adjacent node, a correspondence between the sending node and the challenge information;
• sending, by the sending node, a data packet to the adjacent node, wherein the data packet carries challenge response information corresponding to the sending node, the sending node is a source node of the data packet, the adjacent node is not a destination node of the data packet, and the adjacent node determines, based on the correspondence, challenge information corresponding to the sending node;
• verifying, by the adjacent node, the challenge response information based on the challenge information, to obtain a verification result;
• in response to determining that the verification result is that the adjacent node determines that the data packet is sent by the sending node, obtaining, by the adjacent node, challenge response information corresponding to the adjacent node;
• updating, by the adjacent node, the data packet based on the challenge response information corresponding to the adjacent node, to obtain a forwarding packet, wherein the forwarding packet carries the challenge response information corresponding to the adjacent node;
• and
• sending, by the adjacent node, the forwarding packet to a next-hop node.

A method, applied to a receiving node in a decentralized network, wherein the decentralized network further comprises at least one adjacent node of the receiving node, and the method comprises:

• after the receiving node completes neighbor discovery with an adjacent node, receiving, by the receiving node, a route flooding message sent by the adjacent node, wherein the route flooding message carries unidirectional node authentication information and challenge information;
• performing, by the receiving node, authentication on the route flooding message based on the unidirectional node authentication information, to obtain an authentication result;
• in response to determining that the authentication result is that the route flooding message is sent by the adjacent node, establishing, by the receiving node, a correspondence between the adjacent node and the challenge information;
• receiving, by the receiving node, a forwarding packet sent by the adjacent node, wherein the forwarding packet carries challenge response information corresponding to the adjacent node, the receiving node is a destination node of the forwarding packet, and the adjacent node is not a source node of the forwarding packet;
• determining, by the receiving node based on the correspondence, challenge information corresponding to the adjacent node;
• verifying, by the receiving node, the challenge response information based on the challenge information, to obtain a verification result;
• and
• in response to determining that the verification result is that the challenge information matches the challenge response information, and that the forwarding packet is sent by the adjacent node, parsing, by the receiving node, payload information of the forwarding packet.