Patent attributes
A system, method, and non-transitory computer readable storage medium for privacy preserving routing of a data packet. The data packet may comprise a packet header and a data payload; the packet header comprising at least a homomorphically encrypted final destination address of a final destination device. An intermediate routing device may receive the data packet. At the intermediate routing device, in a non-TEE, homomorphic computations may be performed to determine a homomorphically encrypted address of a next intermediate routing device. At the intermediate routing device, in a TEE, one or more secret homomorphic decryption keys may be stored and used to decrypt the homomorphically encrypted address of the next address of the next intermediate routing device. The data packet may be transmitted to the decrypted address of the next intermediate routing device according to an updated packet header with the unencrypted address of the next intermediate routing device in the sequence.
