US 12,450,394 B2
Privacy-preserving mobility as a service supported by blockchain
Hideji Wakabayashi, Basingstoke (GB)
Assigned to Sony Group Corporation, Tokyo (JP)
Filed by Sony Group Corporation, Tokyo (JP)
Filed on Dec. 18, 2023, as Appl. No. 18/543,050.
Application 18/543,050 is a continuation of application No. 17/278,660, granted, now 11,847,249, previously published as PCT/EP2019/078536, filed on Oct. 21, 2019.
Claims priority of application No. 18202446 (EP), filed on Oct. 25, 2018.
Prior Publication US 2024/0135036 A1, Apr. 25, 2024
Prior Publication US 2024/0232432 A9, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 21/62 (2013.01); G06F 12/14 (2006.01); G06F 21/60 (2013.01); G06F 21/64 (2013.01)
CPC G06F 21/6254 (2013.01) [G06F 12/1408 (2013.01); G06F 12/1458 (2013.01); G06F 21/602 (2013.01); G06F 21/64 (2013.01); G06F 2221/2141 (2013.01); G06F 2221/2143 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for controlling a communication network comprising multiple nodes for providing a distributed ledger, the comprising:
separating sensitive user data and nonsensitive user data associated with a mobility as a service transaction;
providing the non-sensitive user data to the distributed ledger;
storing the sensitive user data in a database of a node separate from the distributed ledger;
generating a hash of the sensitive user data and storing the hash on the distributed ledger;
verifying, using the hash, the sensitive user data without disclosing the sensitive user data on the distributed ledger;
encrypting the sensitive user data using a master encryption key that is accessible only to a mobility as a service provider having a contract with a user associated with the sensitive user data; and
encrypting the non-sensitive user data using a service provider encryption key that is shared among multiple mobility as a service providers having access to the distributed ledger.