US 12,147,970 B2
IC card, processing method, and information processing system
Hiroshige Fukuhara, Tokyo (JP); Tsutomu Nakatsuru, Tokyo (JP); and Masaki Nakamura, Saitama (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Appl. No. 17/264,082
Filed by SONY CORPORATION, Tokyo (JP)
PCT Filed Aug. 8, 2019, PCT No. PCT/JP2019/031436
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/049951, PCT Pub. Date Mar. 12, 2020.
Claims priority of application No. 2018-165202 (JP), filed on Sep. 4, 2018.
Prior Publication US 2021/0374718 A1, Dec. 2, 2021
Int. Cl. G06Q 20/34 (2012.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01)
CPC G06Q 20/341 (2013.01) [H04L 9/0861 (2013.01); H04L 9/30 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An integrated circuit card, comprising:
a recording medium having tamper resistance and configured to store key information indicating a private key forming a pair with a public key or a seed value for generating the private key; and
circuitry configured to
perform communication with a reader,
perform, on a basis of object data to be recorded in a P2P database acquired from the communication with the reader, control to generate signature data corresponding to the object data by applying the object data to the private key,
transmit data including the generated signature data to the reader by the communication with the reader,
determine whether a first signature condition relating to content indicated by the object data is satisfied,
determine whether a second signature condition related to predetermined authentication is satisfied based on a determination that the first signature condition is not satisfied and data acquired from the communication with the reader, and
generate the signature data based on a determination that only one of the first signature condition or the second signature condition is satisfied.