Method of measuring round trip time and proximity checking method using the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-hyu Han, Myung-sun Kim, Young-sun Yoon, Sun-nam Lee, Bong-seon Kim, Jae-heung Lee
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Abstract
A method of measuring round trip time (RTT) and a proximity checking method using the same. The method of measuring RTT includes: transmitting a hashed second random number and starting the RTT measurement; and receiving a hashed first random number from a device that received the hashed second random number and ending the RTT measurement, thereby greatly reducing repetitive encryption and decryption operations in the proximity check using a repetitive RTT measurement.
Claims19
A method of measuring round trip time (RTT), the method comprising:
- transmitting a hashed second random number from a first device;
- starting an RTT measurement when the hashed second random number is transmitted;
- receiving a hashed first random number from a second device which received the hashed second random number;
- and
- ending the RTT measurement when the hashed first random number is received.
A computer-readable storage medium comprising a computer program for executing a method of measuring RTT, the method comprising:
- transmitting a hashed second random number from a first device;
- starting an RTT measurement when the hashed second random number is transmitted;
- receiving a hashed first random number from a second device which received the hashed second random number;
- and
- ending the RTT measurement when the hashed first random number is received.
A proximity check method comprising:
- transmitting a hashed second random number from a first device;
- starting an RTT measurement when the hashed second random number is transmitted;
- receiving a hashed first random number from a second device which received the hashed second random number;
- ending the RTT measurement when the hashed first random number is received;
- and
- checking the proximity of the first and the second devices based on the RTT measurement.
A computer-readable storage medium comprising a computer program for executing a proximity checking method, the method comprising:
- transmitting a hashed second random number from a first device;
- starting an RTT measurement when the hashed second random number is transmitted;
- receiving a hashed first random number from a second device which received the hashed second random number;
- ending the RTT measurement when the hashed first random number is received;
- and
- checking the proximity of the first and the second devices based on the RTT measurement.
A method of supporting an RTT measurement, the method comprising:
- receiving a hashed second random number which corresponds to a RTT measurement start;
- and
- transmitting a hashed first random number, which corresponds to a RTT measurement end, to a first device which transmitted the hashed second random number.
A computer-readable storage medium comprising a computer program for executing a method of supporting an RTT measurement, the method comprising:
- receiving a hashed second random number which corresponds to a RTT measurement start;
- and
- transmitting a hashed first random number, which corresponds to a RTT measurement end, to a first device which transmitted the hashed second random number.
A method of measuring RTT, the method comprising:
- generating a first random number at a first device;
- generating a second random number at a second device;
- securely exchanging the generated first and second random numbers between the first device and the second device;
- transmitting a hashed first random number to measure the RTT from the first device to the second device;
- and
- transmitting a hashed second random number to measure the RTT from the second device to the first device.
Dependencies are inferred from the claim text.