Digitized bank checks validated by digital signatures
First Claim
1. A method, comprising:
- a) creating a digitized image of a bank check;
b) placing the digitized image into an original file CHECK-1 whichi) conforms to a published tagged image format;
ii) contains pointers which allow a file reader to locate predetermined data within the original file CHECK-1;
c) repeating steps (a) and (b) to create original files CHECK-2, CHECK-3, and CHECK-4, each corresponding to a respective bank check;
d) modifying pointers in the original files to produce modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4;
e) placing the modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 into a composite file, whereini) the modified pointers in modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 are effective to allow a file reader to locate the respective predetermined data within the composite file; and
ii) the modified pointers are not effective to allow a file reader to locate the respective predetermined data within the original files CHECK-1, CHECK-2, CHECK-3, and CHECK-4;
f) storing recovery data which indicates differences between the modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 and the corresponding original files; and
g) using the recovery data to recover one of said original files from the composite file and print a paper representation of a check, based on the original file recovered.
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Accused Products
Abstract
A system for handling files containing digitized images, such as digitized bank checks. Four digitized image-files are obtained for each check: front and back at the beginning of a process, and front and back at the end of the process. Four digital signatures are generated, one for each image-file. The four image-files are to be consolidated into a single composite file. However, for technical reasons, the content of the image-files must be altered somewhat. Thus, if the image-files are later extracted from the composite file, the extracted files will not correspond to the original image-files, and will produce different digital signatures. The invention allows the original image-files to be accurately extracted from the composite file.
11 Citations
9 Claims
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1. A method, comprising:
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a) creating a digitized image of a bank check; b) placing the digitized image into an original file CHECK-1 which i) conforms to a published tagged image format; ii) contains pointers which allow a file reader to locate predetermined data within the original file CHECK-1; c) repeating steps (a) and (b) to create original files CHECK-2, CHECK-3, and CHECK-4, each corresponding to a respective bank check; d) modifying pointers in the original files to produce modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4; e) placing the modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 into a composite file, wherein i) the modified pointers in modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 are effective to allow a file reader to locate the respective predetermined data within the composite file; and ii) the modified pointers are not effective to allow a file reader to locate the respective predetermined data within the original files CHECK-1, CHECK-2, CHECK-3, and CHECK-4; f) storing recovery data which indicates differences between the modified files CHECK-1, CHECK-2, CHECK-3, and CHECK-4 and the corresponding original files; and g) using the recovery data to recover one of said original files from the composite file and print a paper representation of a check, based on the original file recovered. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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a) creating a digitized image 1 of a bank check 1; b) placing the digitized image 1 into an original file 1 which i) conforms to a published tagged image format; ii) contains data 1 which describes technical properties of digitized image 1; and iii) contains one or more original first pointers which A) indicate addresses within the original file 1 at which data 1 are located and B) allow a file reader to locate the data 1 within the original file 1; c) creating a digitized image 2 of a bank check 2; d) placing the digitized image 2 into an original file 2 which i) conforms to a published tagged image format; ii) contains data 2 which describes technical properties of digitized image 2; and iii) contains one or more original second pointers which A) indicate addresses within the original file 2 at which data 2 are located and B) allow a file reader to locate the data 2 within the original file 2; d) modifying the original first pointers in the original file 1 into modified first pointers, to thereby produce a modified file 1 which contains modified first pointers; e) modifying the original second pointers in the original file 2 into modified second pointers, to thereby produce a modified file 2 which contains the modified second pointers; f) placing the modified file 1 and the modified file 2 into a composite file, in which composite file i) the modified first pointers are effective to allow a file reader to locate data 1 within composite file; ii) the modified second pointers are effective to allow a file reader to locate data 2 within the composite file; iii) the modified first pointers are not effective to allow a file reader to locate data 1 within original file 1; and iv) the modified second pointers are not effective to allow a file reader to locate data 2 within original file 2; g) storing the composite file and the first and second pointers; h) extracting modified file 2 from the composite file; i) retrieving the stored second pointers and using them to replace the modified second pointers in the modified file 2 which was extracted in paragraph (h), to thereby produce a recovered file 2; and j) printing image 2 on paper, based on the recovered file 2. - View Dependent Claims (9)
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Specification