METHOD AND APPARATUS FOR CHECKING ROUND TRIP TIME BASED ON CHALLENGE RESPONSE, AND COMPUTER READABLE MEDIUM HAVING RECORDED THEREON PROGRAM FOR THE METHOD
First Claim
1. A method of checking a round trip time (RTT) based on a challenge response, the method comprising:
- generating a random number;
encrypting the random number using a symmetrical key;
transmitting a challenge request message including the encrypted random number to a device;
receiving a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key; and
determining an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted.
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus and method of checking adjacency between devices are provided. A challenge response based round trip time (RTT) checking method includes: generating a random number; encrypting the random number using a symmetrical key; transmitting a challenge request message including the encrypted random number to a device; receiving a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key, from the device; and determining an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted.
-
Citations
18 Claims
-
1. A method of checking a round trip time (RTT) based on a challenge response, the method comprising:
-
generating a random number; encrypting the random number using a symmetrical key; transmitting a challenge request message including the encrypted random number to a device; receiving a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key; and determining an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of checking a round trip time (RTT) based on a challenge response, the method comprising:
-
receiving a challenge request message including an encrypted random number, from a device, wherein the encrypted random number is encrypted using a symmetrical key; decrypting the encrypted random number using the symmetrical key; and transmitting a challenge response message including the decrypted random number to the device. - View Dependent Claims (7, 8)
-
-
9. An apparatus for checking a round trip time (RTT) based on a challenge response, the apparatus comprising:
-
a random number generation unit which generates a random number; an encryption unit which encrypts the random number using a symmetrical key; a communication unit which transmits a challenge request message including the encrypted random number to a device, and receives a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key; and an RTT determination unit which determines an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted. - View Dependent Claims (10, 11, 12, 13)
-
-
14. Am apparatus for checking a round trip time (RTT) based on a challenge response, the apparatus comprising:
-
a communication unit which receives a challenge request message including an encrypted random number which is encrypted using a symmetrical key, from a device; and a decryption unit which decrypts the encrypted random number using the symmetrical key, wherein the communication unit transmits a challenge response message including the decrypted random number to the device. - View Dependent Claims (15, 16)
-
-
17. A computer recording medium having recorded thereon a program for a method for checking a round trip time (RTT) based on a challenge response, the method comprising:
-
generating a random number; encrypting the random number using a symmetrical key; transmitting a challenge request message including the encrypted random number to a device; receiving a challenge response message including the random number from the device which received the challenge request message and decrypted the encrypted random number using the symmetrical key; and determining an RTT based on a time when the challenge response message is received and a time when the challenge request message is transmitted.
-
-
18. A computer recording medium having recorded thereon a program for a method for checking a round trip time (RTT) based on a challenge response, the method comprising:
-
receiving a challenge request message including an encrypted random number which is encrypted using a symmetrical key, from a device; decrypting the encrypted random number using the symmetrical key; and transmitting a challenge response message including the decrypted random number to the device.
-
Specification