US4989244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data encripting transfer
Assignee: Shinsangyo Kaihatsu KK
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Filing: 1989-03-29
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Granted: 1991-01-29
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Expires: 2009-03-29
Abstract
Abstract A data encripting transfer system includes a scanner for scanning an object to output an image signal, a data encripting device for encripting the image signal, and a data decoder for decoding the encripted image signal. The system further includes a card having the data encripting device and the data decoder, and a receiving device for receiving the card. The received card enables the data encripting device and the data decoder.
Inventors
- 👤 Yoshihiro Naruse
- 👤 Hideharu Kato
- 👤 Yoshifumi Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:03
CPC Classifications
G; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G06Q20/40975; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; H; H04; H04L; H04L9/00; H04L9/32; H04L9/3271; H04N; H04N1/00; H04N1/44; H04N1/4406; H04N1/4426; H04N1/448; H04N1/4486
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
281 words
A data encrypting transfer system comprising: first transmitter/receiver means comprising first transmitting means for transmitting encrypted key data, encrypted image data and a flag signal, scanning means for scanning an object to output an image signal, a key circuit for setting key data, encrypting means for encrypting the key data, and for encrypting the image signal in accordance with the set key data; and second transmitter/receiver means comprising receiver means for receiving the encrypted key data, the encrypted image data and the flag signal transmitted by said first transmitter means, decoder means for decoding the received encrypted key data, thereby providing decoded key data, and for decoding the encrypted image signal; said second transmitter/receiver means further comprising means for encrypting the decoded key data, thereby providing answer back data, and second transmitter means for transmitting the answer back data to said first transmitter/receiver means; and said first transmitter/receiver means further comprising decoding means for decoding the answer back data transmitted by said second transmitter means, comparing means for comparing the decoded answer back data with the key data set by said key circuit, means for setting the flag signal in accordance with whether the comparison indicates that the decoded answer back data is coincident with the key data set by said key circuit, and the decoder means of said second transmitter/receive means being set in accordance with the decoded key data only if the flag signal transmitted by said first transmitter means indicates coincidence between the decoded answer back data and the key data set by said key circuit so that the decoder means of said second transmitter/receiver means decodes the encrypted image signal in accordance with the decoded key data.
Claim 2
Dependent Claim
281 words
A data encrypting transfer system comprising: first transmitter/receiver means comprising first transmitting means for transmitting encrypted key data, encrypted image data and a flag signal, scanning means for scanning an object to output an image signal, a key circuit for setting key data, encrypting means for encrypting the key data, and for encrypting the image signal in accordance with the set key data; and second transmitter/receiver means comprising receiver means for receiving the encrypted key data, the encrypted image data and the flag signal transmitted by said first transmitter means, decoder means for decoding the received encrypted key data, thereby providing decoded key data, and for decoding the encrypted image signal; said second transmitter/receiver means further comprising means for encrypting the decoded key data, thereby providing answer back data, and second transmitter means for transmitting the answer back data to said first transmitter/receiver means; and said first transmitter/receiver means further comprising decoding means for decoding the answer back data transmitted by said second transmitter means, comparing means for comparing the decoded answer back data with the key data set by said key circuit, means for setting the flag signal in accordance with whether the comparison indicates that the decoded answer back data is coincident with the key data set by said key circuit, and the decoder means of said second transmitter/receive means being set in accordance with the decoded key data only if the flag signal transmitted by said first transmitter means indicates coincidence between the decoded answer back data and the key data set by said key circuit so that the decoder means of said second transmitter/receiver means decodes the encrypted image signal in accordance with the decoded key data.
Claim 3
Dependent Claim
30 words
The system defined in claim 1, wherein said encrypting means comprises a first encrypting circuit and a second encrypting circuit connected to receive an output of said first encrypting circuit.
Claim 4
Dependent Claim
30 words
The system defined in claim 1, wherein said decoding means comprises a first decoder circuit and a second decoder circuit connected to receive an output of said first decoder circuit.
Claim 5
Dependent Claim
87 words
The system defined in claim 2, wherein said decoding means comprises a first decoder circuit and a second decoder circuit connected to receive an output of said first decoder circuit, and wherein said first encrypting circuit provides a first encrypting function, said second encrypting circuit provides a second encrypting function, said first decoder circuit provides a first decoding function which is an inverse of the first encrypting function, and said second decoder circuit provides a second decoding function which is an inverse of the second encrypting function.
Claim 6
Dependent Claim
23 words
The system defined in claim 1, further comprising means for disabling said encrypting means so that said transmitter means transmits said image signal.
Claim 7
Dependent Claim
22 words
The system defined in claim 3, further comprising means for disabling said decoding means in response to disablement of said encrypting means.
Claim 8
Dependent Claim
37 words
The system defined in claim 1, further comprising card means containing said encrypting means, and card receiving means for receiving said card means, said encrypting means being enabled when said card receiving means receives said card means.
Claim 9
Dependent Claim
38 words
The system as defined in claim 1, further comprising card means containing said decoding means, and card receiving means for receiving said card means, said decoding means being enabled when said card receiving means receives said card means.
Claim 10
Dependent Claim
27 words
The system defined in claim 6, wherein said means for disabling said decoder means comprises a buffer directly connected to receive signals transmitted by said transmitter means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |