According to a method of generating a key of the present invention, a first device and a second device are first brought into contact with one vibrator. In this state, the vibrator generates vibration. A first acceleration sensor provided in the first device and a second acceleration sensor provided in the second device detect the vibration. Subsequently, the first device notifies the second device of a first feature value based upon the detection result of the first acceleration sensor. The second device notifies the first device of a second feature value based upon the detection result of the second acceleration sensor. Then the first device compares the notified second feature value with the first feature value and generates a key based upon the comparison result. The second device compares the notified first feature value with the second feature value and generates a key based upon the comparison result.

Claims

30 · 3 independent · depth 4

30 granted claims

›1.independentA key generation apparatus comprising:nan acceleration sensor configured to detect an acceleration of the apparatus that is produced in accordance wit…+10

›2.↳ 1The key generation apparatus as recited in claim 1, wherein the vibrator continuously repeats a plurality of times an on-interval in which vibration i…d2+1

›4.↳ 1The key generation apparatus as recited in claim 1, comprising the vibrator.d2

›5.↳ 1The key generation apparatus as recited in claim 1, further comprising:na vibrator controller controlling the vibrator to generate and stop vibration …d2+4

›6.↳ 5The key generation apparatus as recited in claim 5, wherein the vibrator controller generates or stops vibration of the vibrator based upon the number…d3

›7.↳ 5The key generation apparatus as recited in claim 5 wherein:nthe quantizer quantizes existence of the vibration, andthe feature value generator generat…d3+2

›10.↳ 1The key generation apparatus as recited in claim 1, further comprising a hasher configured to output a hash value from an input value, wherein:nthe tr…d2

›11.↳ 1A key generation system comprising a plurality of key generation apparatuses as recited in claim 1 and at least one vibrator.d2

›12.independentA non-transitory computer-readable recording medium for storing a program executable in an apparatus comprising an acceleration sensor, a data communi…+9

›13.↳ 12The non-transitory computer-readable recording medium as recited in claim 12, wherein:nin the detection step, an on-interval in which vibration is gen…d2+1

›15.↳ 12The non-transitory computer-readable recording medium as recited in claim 12, storing a program executable in the apparatus further comprising a vibra…d2

›16.↳ 12The non-transitory computer-readable recording medium as recited in claim 12, wherein the program executes a procedure with the processor, the procedu…d2+4

›17.↳ 16The non-transitory computer-readable recording medium as recited in claim 16, wherein, in the control step, vibration of the vibrator is generated or …d3

›18.↳ 16The non-transitory computer-readable recording medium as recited in claim 16, wherein:nin the quantization step, existence of the vibration is quantiz…d3+2

›21.↳ 12The non-transitory computer-readable recording medium as recited in claim 12, wherein:nthe program further includes a hash step of outputting a hash v…d2

›22.independentA method of generating a key, comprising:ngenerating vibration with a vibrator in a state in which a first device and a second device are brought into…+8

›23.↳ 22The method as recited in claim 22, wherein:nin the detecting, an on-interval in which vibration is generated and an off-interval in which no vibration…d2+1

›25.↳ 22The method as recited in claim 22, comprising:ncontrolling the vibrator to generate and stop vibration in accordance with intervals having a randomly …d2+4

›26.↳ 25The method as recited in claim 25, wherein, in the controlling, vibration of the vibrator is generated or stopped based upon the number of the interva…d3

›27.↳ 25The method as recited in claim 25, wherein:nin the quantizing, existence of the vibration is quantized, andin the feature value generating, the first …d3+2

›30.↳ 22The method as recited in claim 22, further comprising outputting a hash value from an input value, wherein:nin the transmitting, a hash value of the f…d2

Classifications

3 codes

IPC · International Patent Classification

Section H — Electricity

H04L9/00
H04L9/08
H04M1/725

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3.8 y

1,393 days filing → grant

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non-final + final

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no RCE

Examiner

Ghazal Shehni

art unit 2436 · TC 2400

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130272520 A1	17 Oct 2013

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