US2019238530A1PendingUtilityA1

Secure authenticated distance measurement

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Assignee: KONINKLIJKE PHILIPS NVPriority: Jul 26, 2002Filed: Apr 12, 2019Published: Aug 1, 2019
Est. expiryJul 26, 2022(expired)· nominal 20-yr term from priority
Inventors:Franciscus L.A.J. Kamperman
H04L 9/30H04W 24/00H04L 9/14H04L 2463/101G06F 2221/2111H04L 43/16G06F 21/10H04L 9/3263H04L 63/0428H04L 63/107H04L 43/0852H04L 63/0823H04L 63/062H04W 12/63H04L 9/32H04W 12/041H04W 12/069
60
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Claims

Abstract

The invention relates to a method for a first communication device to perform authenticated distance measurement between the first communication device and a second communication device, wherein the first and the second communication device share a common secret and the common secret is used for performing the distance measurement between the first and the second communication device. The invention also relates to a method of determining whether data stored on a first communication device are to be accessed by a second communication device. Moreover, the invention relates to a communication device for performing authenticated distance measurement to a second communication device. The invention also relates to an apparatus for playing back multimedia content comprising a communication device.

Claims

exact text as granted — not AI-modified
1 . A first device for controlling delivery of protected content to a second device, the first device comprising a processor circuit, the processor circuit arranged to execute instructions, the instructions arranged to:
 receive a certificate from the second device prior to sending a first signal, wherein the certificate is associated with the second device;   provide the first signal to the second device when the certificate indicates that the second device is compliant with at least one compliance rule;   receive a second signal from the second device after providing the first signal, wherein the second signal is derived from a secret known by the second device; and   provide the protected content to the second device when the first device determines that the second signal is derived from the secret and a time between the providing of the first signal and the receiving of the second signal is less than a predetermined time.   
     
     
         2 . The first device of  claim 1 , wherein the secret is securely provided to the second device by the first device. 
     
     
         3 . The first device of  claim 1 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal, wherein the modifying requires the secret; and   determining that the modified first signal is identical to the second signal.   
     
     
         4 . The first device of  claim 1 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal; and   determining that the modified first signal is identical to the second signal.   
     
     
         5 . The first device of  claim 1 , wherein the predetermined time is based on a communication system associated with the first device. 
     
     
         6 . The first device of  claim 1 , further comprising instructions arranged to provide the secret to the second device. 
     
     
         7 . The first device of  claim 1 , wherein the second signal comprises the first signal modified by the secret. 
     
     
         8 . The first device of  claim 1  wherein the secret comprises a random number. 
     
     
         9 . The first device of  claim 1  wherein the secret is encrypted with a public key. 
     
     
         10 . The first device of  claim 1  wherein the first signal comprises a random number. 
     
     
         11 . The first device of  claim 1 , wherein the second signal comprises an XOR operation of the first signal with the secret. 
     
     
         12 . The first device of  claim 1 , further comprising instructions arranged to receive the secret from the second device. 
     
     
         13 . The first device of  claim 1 , wherein the secret is used for generating a secure channel between the first device and the second device. 
     
     
         14 . The second device of  claim 1 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal, wherein the modifying requires the secret; and   determining that the modified second signal is identical to the first signal.   
     
     
         15 . The first device of  claim 1 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal; and   determining that the modified second signal is identical to the first signal.   
     
     
         16 . The first device of  claim 1 , wherein the secret is known by the first device. 
     
     
         17 . The first device of  claim 2 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal, wherein the modifying requires the secret; and   determining that the modified first signal is identical to the second signal.   
     
     
         18 . The first device of  claim 2 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal; and   determining that the modified first signal is identical to the second signal.   
     
     
         19 . The first device of  claim 2 , wherein the predetermined time is based on a communication system associated with the first device. 
     
     
         20 . The first device of  claim 2 , further comprising instructions arranged to provide the secret to the second device. 
     
     
         21 . The first device of  claim 2 , wherein the second signal comprises the first signal modified by the secret. 
     
     
         22 . The first device of  claim 2 , wherein the secret comprises a random number. 
     
     
         23 . The first device of  claim 2 , wherein the secret is encrypted with a public key. 
     
     
         24 . The first device of  claim 2 , wherein the first signal comprises a random number. 
     
     
         25 . The first device of  claim 2 , wherein the second signal comprises an XOR operation of the first signal with the secret. 
     
     
         26 . The first device of  claim 2 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal, wherein the modifying requires the secret; and   determining that the modified second signal is identical to the first signal.   
     
     
         27 . The first device of  claim 2 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal; and   determining that the modified second signal is identical to the first signal.   
     
     
         28 . The first device of  claim 2 , wherein the secret is used for generating a secure channel between the first device and the second device. 
     
     
         29 . A method of controlling delivery of protected content from a first device to a second device, the first device comprising a processor circuit the processor circuit arranged to execute instructions implementing the method, the method comprising:
 receiving a certificate from the second device prior to sending a first signal, wherein the certificate is associated with the second device;   providing the first signal to the second device when the certificate indicates that the second device is compliant with at least one compliance rule;   receiving a second signal from the second device after providing the first signal, wherein the second signal is derived from a secret known by the second device;   sending the protected content from the first device to the second device when the first device determines that the second signal is derived from the secret and a time between the providing of the first signal and the receiving of the second signal is less than a predetermined time.   
     
     
         30 . The method of  claim 29 , wherein the secret is securely provided to the second device by the first device. 
     
     
         31 . The method of  claim 29 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal according to the secret; and   determining that the modified first signal is identical to the second signal.   
     
     
         32 . The method of  claim 29 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal; and   determining that the modified first signal is identical to the second signal.   
     
     
         33 . The method of  claim 29 , wherein the predetermined time is based on a communication system associated with the first device. 
     
     
         34 . The method of  claim 29 , further comprising providing the secret to the second device. 
     
     
         35 . The method of  claim 29 , wherein the second signal comprises the first signal modified by the secret. 
     
     
         36 . The method of  claim 29 , wherein the secret comprises a random number. 
     
     
         37 . The method of  claim 29 , wherein the secret is encrypted with a public key. 
     
     
         38 . The method of  claim 29 , wherein the first signal comprises a random number. 
     
     
         39 . The method of  claim 29 , wherein the second signal comprises an XOR operation of the first signal with the secret. 
     
     
         40 . The method of  claim 29 , further comprising instructions arranged to receive the secret from the second device. 
     
     
         41 . The method of  claim 29 , wherein the secret is used for generating a secure channel between the first device and the second device. 
     
     
         42 . The method of  claim 29 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal according to the secret; and   determining that the modified second signal is identical to the first signal.   
     
     
         43 . The first device of  claim 3 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal, wherein the modifying requires the secret; and   determining that the modified first signal is identical to the second signal.   
     
     
         44 . The method of  claim 30 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal, wherein the modifying requires the secret; and   determining that the modified first signal is identical to the second signal.   
     
     
         45 . The method of  claim 30 , wherein determining that the second signal is derived from the secret comprises:
 modifying the first signal; and   determining that the modified first signal is identical to the second signal.   
     
     
         46 . The method of  claim 30 , wherein the second signal comprises the first signal modified by the secret. 
     
     
         47 . The method of  claim 30 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal, wherein the modifying requires the secret; and   determining that the modified second signal is identical to the first signal.   
     
     
         48 . The method of  claim 30 , wherein determining that the second signal is derived from the secret comprises:
 modifying the second signal, wherein the modifying requires the secret; and   determining that the modified second signal is identical to the first signal.   
     
     
         49 . The method of  claim 44 , wherein the second signal comprises an XOR operation of the first signal with the secret. 
     
     
         50 . The method of  claim 44 , wherein the secret comprises a first random number. 
     
     
         51 . The method of  claim 50 , wherein the secret is used for generating a secure channel between the first device and the second device. 
     
     
         52 . The method of  claim 50 , wherein the secret is encrypted with a public key. 
     
     
         53 . The method of  claim 52 , wherein the first signal comprises a second random number.

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