US Patent No. 10,511,972

COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND PROGRAM


Patent No. 10,511,972
Issue Date December 17, 2019
Title Communication Apparatus, Communication Method, And Program
Inventorship Tatsuo Nagamatsu, Tokyo (JP)
Assignee SONY CORPORATION, Tokyo (JP)

Claim of US Patent No. 10,511,972

12. A communication method, comprising:acquiring information regarding position data or an external environment of a portable communication apparatus;
determining, by control circuitry of the portable communication apparatus, whether the information satisfies a predetermined condition that indicates a secure transmission environment;
determining whether the portable communication apparatus is in a state in which communication with another portable communication apparatus is not permitted;
in response to determining that both the information satisfying the predetermined condition and the portable communication apparatus being in the state in which communication is not permitted, changing the state of the portable communication apparatus to a first state in which transmission, of first identification information of the portable communication apparatus, to the another portable communication apparatus is permitted; and
transmitting, by the control circuitry in response to determining that the information does not satisfy predetermined condition, second identification information of the portable communication apparatus to the another portable communication apparatus, wherein
the second identification information is generated according to a hash value and a random value,
the random value is changed for each predetermined time, and
the hash value is calculated according to an identity resolving key that is known by the another communication apparatus so that the second identification information is recognizable by the another communication apparatus.