Based on the multi-routing protocols and the reed-solomon error-correcting coding scheme

a data transmission method was presented

in which

round-encryption and round-signature were not needed. Data packets were all encoded by RS codes and cut into pieces before sending in different paths. After receive all the pieces of a data packet

the destina-tion node could judge whether a malicious modification had been occurred

if so

the malicious node would be found out or be located in a malicious-node-group by a detecting process. Then by fully using the information gotten from detecting process

a reputation mechanism was proposed to resist the modification attacks. When implement it

the Bayesian ap-proach was used to evaluate a node’s reputation. The simulation results show that it can react to the attacks more quickly and accurately.