WO1996008093B1 - Biometric controlled key generation - Google Patents
Biometric controlled key generationInfo
- Publication number
- WO1996008093B1 WO1996008093B1 PCT/CA1995/000509 CA9500509W WO9608093B1 WO 1996008093 B1 WO1996008093 B1 WO 1996008093B1 CA 9500509 W CA9500509 W CA 9500509W WO 9608093 B1 WO9608093 B1 WO 9608093B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- information signal
- fourier transform
- private key
- generating
- Prior art date
Links
- 230000003287 optical Effects 0.000 claims abstract 7
- 239000000969 carrier Substances 0.000 claims 8
- 238000001914 filtration Methods 0.000 claims 4
- 230000001131 transforming Effects 0.000 claims 4
- 230000000051 modifying Effects 0.000 abstract 1
Abstract
A key generation system is implemented as follows. In an enrolment apparatus, a unique number for use with PIN operated machines or public key cryptography system is generated by manipulation of fingerprint information of a subscriber. A filter is then generated which is a function both of the Fourier transform of the subscriber's fingerprint(s) and of the unique number. This filter is stored on a subscriber card. When the subscriber wishes to generate his key, he inputs his card to a card reader of an apparatus and places his finger(s) on a fingerprint input. The apparatus generates an optical Fourier transform from the fingerprint input. The Fourier transform signal is incident on to a spatial light modulator programmed with the filter information from the card. An inverse transform is generated from the filtered signal and this is used to regenerate the key that will be used as the PIN in a PIN operated device, or as the private key in a public key cryptography system.
Claims
AMENDED CLAIMS
[received by the International Bureau on 4 March 1996 (04.03.96); new claims 18-43 added; remaining claims unchanged (6 pages)]
18. A biometric controlled key generation system, comprising:
- a body part input for generating an information signal impressed with a biometric from a body part;
- means for reading comparison data from a data carrier, said comparison data comprising private key data encrypted by biometric data; and
- means for comparing said information signal with said comparison data for recovering said private key data from said comparison data.
19. A biometric controlled private key encoding system, comprising:
- a body part input for generating an information signal impressed with a biometric from a body part;
- means to generate a function based on one of said private key and a unique number from which said private key may be derived;
- means to generate biometric data from said information signal;
- means to encrypt said function with said biometric data to generate comparison data; and
- means for storing said comparison data on a data carrier.
20. The key generation system of claim 18 including means for storing said comparison data on said data carrier, comprising:
- a further body part input for generating a further information signal impressed with a biometric from said body part;
- means to generate a function based on one of said private key and a unique number from which said private key may be derived, said array comprising said private key data;
- means to generate biometric data from said further information signal;
- means to encrypt said array with said biometric data to generate said comparison data; and
- means for storing said comparison data on said data carrier.
21. The key generation system of claim 20 including key generating means for generating a private key from said private key data.
22. The key generation system of claim 21 wherein said means to generate a function is based on said unique number and wherein said key generating means comprises means to recover said unique number from said private key data, and including a pseudo-random number generator responsive to said private key data and a key generator responsive to said pseudo-random number generator and said means to recover said unique number.
23. The key generation system of claim 18 wherein said body part input for generating an information signal comprises optical means for generating an optical information signal and wherein said means for comparing comprises Fourier transform means to obtain a Fourier transform representation of said optical information signal.
24. The key generation system of claim 23 wherein said Fourier transform means comprises optical transform means along a path of said optical information signal and wherein said means for comparing includes (i) a programmable filter responsive to said optical transform means for filtering said Fourier transform representation of said information signal to obtain a filtered Fourier transform representation, (ii) means for programming said filter with said comparison data, and (iii) inverse transform means responsive to said filter to inverse Fourier transform said filtered Fourier transform representation to obtain an inverse transform representation, and including key generating means responsive to said inverse transform means for generating a private key from said private key data.
25. The key generation system of claim 22 wherein said means for comparing comprises Fourier transform means to obtain a Fourier transform representation of said information signal.
26. The key generation system of claim 25 wherein said Fourier transform means comprises transform means along a path of said information signal and wherein said means for comparing includes (i) a programmable filter responsive to said transform means for filtering said Fourier transform representation of said information signal to obtain a filtered Fourier transform representation, (ii) means for programming said filter with said comparison data, and (iii) inverse transform means responsive to said filter to
inverse Fourier transform said filtered Fourier transform representation to obtain an inverse transform representation, said key generating means being responsive to said inverse transform means.
27. The key generation system of claim 26 including means to obtain one of said private key and a unique number from which said private key may be derived from said further information signal and wherein said means to generate biometric data from said further information signal comprises means for generating a Fourier transform of said further information signal.
28. The key generation means of claim 27 wherein said means for reading comparison data is also for reading comparison data from a data carrier storing an indication of an intensity of a component of an inverse Fourier transform and wherein said means for comparing is responsive to said data reading means to recover private key data based on said intensity indication as well as based on said inverse transform.
29. A method for generating a private key, comprising the steps of:
- generating an information signal impressed with a biometric;
- reading comparison data from a data carrier, said comparison data comprising private key data encrypted with biometric data; and
- comparing said information signal with said comparison data for recovering said private key data from said comparison data.
30. A method for encoding a private key, comprising the steps of:
(a) generating an information signal impressed with a biometric from a body part;
(b) obtaining function generation data comprising one of a private key and a unique number from which said private key may be derived;
(c) generating an array based on step (b);
(d) generating biometric data from said information signal;
(e) encrypting said function with said biometric data to generate said comparison data; and
(f) storing said comparison data on said data carrier.
31. The method of claim 29 including the steps of:
(a) generating a further information signal impressed with a biometric from said body part;
(b) obtaining function generation data comprising one of said private key and a unique number from which said private key may be derived;
(c) generating a function based on step (b);
(d) generating biometric data from said further information signal;
(e) encrypting said function with said biometric data to generate said comparison data; and
(f) storing said comparison data on said data carrier.
32. The method of claim 31 wherein step (b) comprises obtaining said unique number and including the step of pseudo-randomly generating a private key based on said unique number.
33. The method of claim 29 wherein said step of comparing comprises obtaining a Fourier transform representation of said information signal.
34. The method of claim 33 wherein said step of obtaining a Fourier transform comprises transforming said information signal and wherein said step of comparing includes (i) filtering said Fourier transform representation of said information signal with a filter programmed with said comparison data to obtain a filtered Fourier transform representation, and (ii) inverse Fourier transforming said filtered Fourier transform representation to obtain an inverse transform representation, said step of generating a key utilising said inverse transform.
35. The method of claim 31 wherein said step of comparing comprises obtaining a Fourier transform representation of said information signal.
36. The method of claim 35 wherein said step of obtaining a Fourier transform comprises transforming said information signal and wherein said step of comparing includes (i) filtering said Fourier transform representation of said information signal with a filter
programmed with said comparison data to obtain a filtered Fourier transform representation, and (ii) inverse Fourier transforming said filtered Fourier transform representation to obtain an inverse transform representation, said step of generating a key utilising said inverse transform.
37. The method of claim 35 including the step of obtaining one of said private key and a unique number from which said private key may be derived from said further information signal and wherein said step of generating biometric data from said further information signal comprises generating a Fourier transform of said further information signal.
38. The key generation means of claim 37 wherein said step of reading comparison data comprises reading an indication of an intensity of a component of an inverse Fourier transform and wherein said step of comparing comprises recovering private key data based on said intensity indication as well as based on said inverse transform.
39. The method of claim 29 including the step of utilising said private key data for decrypting a public key encrypted message.
40. The method of claim 29 including the step of utilising said private key data for accessing a PIN operated device.
41. The method of claim 31 wherein said step of generating a function comprises deriving an array based on said function generation data and, for each element of said array, setting an amplitude of an impulse function based on said each element in order to obtain a weighted impulse function array, and wherein the step of encrypting comprises dividing a Fourier transform representation of said weighted impulse function array by said Fourier transform representation of said further information signal.
42. The method of claim 31 wherein said step of generating a function comprises associating a pattern of impulse functions with said function generation data, and wherein the step of encrypting comprises dividing a Fourier transform representation of said
associated pattern of impulse functions by said Fourier transform representation of said further information signal.
43. The method of claim 31 wherein said step of generating a function comprises associating a pattern of impulse functions with said function generation data, deriving an array based on said function generation data and, for each element of said array, setting an amplitude of one impulse function of said pattern of impulse functions based on said each element in order to obtain a weighted impulse function pattern, and wherein d e step of encrypting comprises dividing a Fourier transform representation of said weighted impulse function pattern by said Fourier transform representation of said further information signal.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU33390/95A AU689946B2 (en) | 1994-09-07 | 1995-09-06 | Biometric controlled key generation |
| BR9509002A BR9509002A (en) | 1994-09-07 | 1995-09-06 | Generation of biometrically controlled code |
| EP95929706A EP0780040A2 (en) | 1994-09-07 | 1995-09-06 | Biometric controlled key generation |
| CA002199034A CA2199034C (en) | 1994-09-07 | 1995-09-06 | Biometric controlled key generation |
| JP8509062A JPH10505474A (en) | 1994-09-07 | 1995-09-06 | Apparatus and method for creating a key based on biometric information |
| MXPA/A/1997/001786A MXPA97001786A (en) | 1994-09-07 | 1997-03-07 | Generation of controlled key biometricame |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/301,677 US5541994A (en) | 1994-09-07 | 1994-09-07 | Fingerprint controlled public key cryptographic system |
| US08/301,677 | 1994-09-07 | ||
| US08/512,491 | 1995-08-08 | ||
| US08/512,491 US5680460A (en) | 1994-09-07 | 1995-08-08 | Biometric controlled key generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996008093A1 WO1996008093A1 (en) | 1996-03-14 |
| WO1996008093B1 true WO1996008093B1 (en) | 1996-04-18 |
Family
ID=26972538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CA1995/000509 WO1996008093A1 (en) | 1994-09-07 | 1995-09-06 | Biometric controlled key generation |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5680460A (en) |
| EP (1) | EP0780040A2 (en) |
| JP (1) | JPH10505474A (en) |
| CN (1) | CN1157677A (en) |
| AU (1) | AU689946B2 (en) |
| BR (1) | BR9509002A (en) |
| CA (1) | CA2199034C (en) |
| WO (1) | WO1996008093A1 (en) |
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- 1995-08-08 US US08/512,491 patent/US5680460A/en not_active Expired - Lifetime
- 1995-09-06 JP JP8509062A patent/JPH10505474A/en active Pending
- 1995-09-06 EP EP95929706A patent/EP0780040A2/en not_active Withdrawn
- 1995-09-06 AU AU33390/95A patent/AU689946B2/en not_active Ceased
- 1995-09-06 WO PCT/CA1995/000509 patent/WO1996008093A1/en not_active Application Discontinuation
- 1995-09-06 CN CN95194945A patent/CN1157677A/en active Pending
- 1995-09-06 BR BR9509002A patent/BR9509002A/en unknown
- 1995-09-06 CA CA002199034A patent/CA2199034C/en not_active Expired - Lifetime
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