Encryption device
First Claim
1. A system for encrypting and decrypting a document, the system comprising:
- a first optical scanner for scanning the document to produce a first bitmap;
a first processor for encrypting the first bitmap representative of the document into an encrypted bitmap;
a first character entry device coupled to the first processor for input of non-encrypted character information;
a modem coupled to the first processor for transmitting the encrypted bitmap and the non-encrypted character information over a communications link;
a second processor, having a memory, coupled to the communications link for storing the encrypted bitmap and the non-encrypted character information received over the communications link in memory and separating the information and the encrypted bitmap, and thereafter decrypting the encrypted bitmap into a decrypted bitmap, the decrypted bitmap being a replica of the first bitmap representative of the document; and
an output device coupled to the second processor to output the non-encrypted character data and the decrypted bitmap.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for the encryption of documents is described. A document, which may contain not only text, but also handwriting, pictures, charts, or other graphic images, is converted into a bitmap. This bitmap is encrypted and printed, preferably in a widely-spaced format for ease of subsequent processing, as an encrypted document. The encrypted document may then be copied or sent via facsimile machine as any other printed document, but without disclosing its contents to individuals other than the intended recipient. The encrypted document, or a replica thereof, is then scanned into a decryption device, which converts it into an encrypted bitmap, decrypts the encrypted bitmap, and displays or prints the decrypted document. Bitmap compression may optionally be used to reduce the size of the encrypted document.
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Citations
41 Claims
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1. A system for encrypting and decrypting a document, the system comprising:
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a first optical scanner for scanning the document to produce a first bitmap; a first processor for encrypting the first bitmap representative of the document into an encrypted bitmap; a first character entry device coupled to the first processor for input of non-encrypted character information; a modem coupled to the first processor for transmitting the encrypted bitmap and the non-encrypted character information over a communications link; a second processor, having a memory, coupled to the communications link for storing the encrypted bitmap and the non-encrypted character information received over the communications link in memory and separating the information and the encrypted bitmap, and thereafter decrypting the encrypted bitmap into a decrypted bitmap, the decrypted bitmap being a replica of the first bitmap representative of the document; and an output device coupled to the second processor to output the non-encrypted character data and the decrypted bitmap. - View Dependent Claims (2)
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3. A system for encrypting and decrypting a document, the system comprising:
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a first memory for storing the document as a first bitmap; a first processor coupled to the first memory for encrypting the first bitmap representative of the document stored in the first memory into an encrypted bitmap; a first character entry device coupled to the first processor for input of non-encrypted character information; a modem coupled to the first processor for transmitting the encrypted bitmap and the non-encrypted character information over a communications link; a second processor, having a second memory, coupled to the communications link for storing the encrypted bitmap and the non-encrypted character information received over the communications link in the second memory and separating the information stored in the second memory into the non-encrypted character information and the encrypted bitmap, and thereafter decrypting the encrypted bitmap into a decrypted bitmap, the decrypted bitmap being a replica of the first bitmap representative of the document; and an output device coupled to the second processor to output the non-encrypted character data and the decrypted bitmap. - View Dependent Claims (4)
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5. A system for encrypting and decrypting a document, the system comprising:
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a first processor for encrypting a first bitmap representative of the document into a first encrypted bitmap; a data entry device coupled to the first processor for input of non-encrypted character information; means, coupled to the first processor and the data entry device, for transmitting a combination of the first encrypted bitmap and the non-encrypted character information over a communications link; and a second processor coupled to the communications link for separating the combination into the non-encrypted character information and a second encrypted bitmap, and thereafter decrypting the second encrypted bitmap into a decrypted bitmap, the decrypted bitmap being a replica of the first bitmap representative of the document. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A system for encrypting and decrypting a document, the system comprising:
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a first processor for encrypting a bitmap representative of the document into an encrypted bitmap; means, coupled to the first processor, for transmitting the encrypted bitmap over a communications link; means for receiving the encrypted bitmap over the communications link; means, coupled to the communications link, for printing the encrypted bitmap; an optical scanner for scanner for scanning the encrypted bitmap after transmission of the encrypted bitmap over the communications link; a second processor coupled to the optical scanner for decrypting the encrypted bitmap into a decrypted bitmap, the decrypted bitmap being a replica of the bitmap representative of the document. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for the secure transfer of a document comprising textual and non-textual information, the method comprising the steps of:
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optically scanning the document to produce a first bitmap representative of the document; encrypting the first bitmap using an encryption key to create a second bitmap comprising multi-pixel symbols; transmitting the second bitmap over a communications link; and decrypting the second bitmap using a decryption key to create a third bitmap. - View Dependent Claims (24, 25, 26)
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27. A method for encrypted electronic data transmission of a document comprising the steps of:
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creating an electronic encrypted pixel representation of the document; coding the pixels in the electronic encrypted pixel representation of the document into multi-pixel symbols; introducing markers at pre-defined locations within the electronic encrypted pixel representation of the document; and transmitting the electronic encrypted pixel representation of the document over a transmission line. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for the transmission of data comprising the steps of:
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creating a digital representation of a document, the document including both text and non-text data; coding the digital representation of the document into multi-pixel symbols; and transmitting the multi-pixel symbols over a communications link. - View Dependent Claims (40, 41)
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Specification