Apparatus and method for managing pseudonym certificates and preventing tracking thereof
AssigneesPenta Security Systems Inc., Autocrypt Co., Ltd.
InventorsMyung Woo Chung, Hyun Min Choi, Sang Gyoo Sim, Eui Seok Kim, Duk Soo Kim, Seok Woo Lee
Life of this patent
Estimating the term…
Abstract
A pseudonym certificate management method, performed by a pseudonym certificate management apparatus interworking with an external server, may comprise: receiving, from the external server, a pseudonym certificate in a state locked based on a root value identifiable only by the external server; periodically receiving an unlocking key for the pseudonym certificate from the external server; activating the pseudonym certificate with the unlocking key; and when the activated pseudonym certificate is abnormal, deactivating the pseudonym certificate.
Claims12
A method for managing pseudonym certificates and preventing tracking thereof, performed by a pseudonym certificate management apparatus interworking with an external server, the method comprising:
- receiving, from the external server, a pseudonym certificate in a state locked based on a root value identifiable only by the external server;
- periodically receiving an unlocking key for the pseudonym certificate from the external server;
- activating the pseudonym certificate with the unlocking key;
- and
- when the activated pseudonym certificate is abnormal, deactivating the pseudonym certificate,
- wherein the pseudonym certificate in the state locked based on the root value is generated by generating a plurality of linkage seed values for generating an identifier (ID) of the pseudonym certificate based on the root value identifiable by the plurality of linkage authorities;
- generating pre-linkage values (PLV) encrypted based on the linkage seed values according to an advanced encryption standard (AES);
- and
- generating a plurality of linkage values representing the ID of the pseudonym certificate based on the pre-linked values.
- wherein the linkage seed values are generated by being grouped according to a preset periodicity into a plurality of groups which not connected to each other.
An apparatus for managing pseudonym certificates and preventing tracking thereof, the apparatus comprising:
- a processor;
- and
- a memory storing at least one instruction executable by the processor,
- wherein when executed by the processor, the at least one instruction causes the processor to:
- receive, from an external server, a pseudonym certificate in a state locked based on a root value identifiable only by the external server;
- periodically receive an unlocking key for the pseudonym certificate from the external server;
- activate the pseudonym certificate with the unlocking key;
- and
- when the activated pseudonym certificate is abnormal, deactivate the pseudonym certificate,
- wherein the pseudonym certificate in the state locked based on the root value is generated by generating a plurality of linkage seed values for generating an identifier (ID) of the pseudonym certificate based on the root value identifiable by the plurality of linkage authorities;
- generating pre-linkage values (PLV) encrypted based on the linkage seed values according to an advanced encryption standard (AES):
- and
- generating a plurality of linkage values representing the ID of the pseudonym certificate based on the pre-linked values,
- wherein the linkage seed values are generated by being grouped according to a preset periodicity into a plurality of groups which not connected to each other.
Dependencies are inferred from the claim text.