Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A digital camera with apparatus for authentication of images produced from an image file taken by said digital camera of a scene, said digital camera having embedded therein a private key unique to said digital camera and a known public key so uniquely based upon said private key that digital data encrypted with said private key may be decrypted using said public key, said digital camera apparatus comprising first means for calculating image hash of said image file using a predetermined algorithm, second means for encrypting said image hash with said embedded private key, thereby producing a digital signature uniquely associated with said image file, and third means for maintaining association of both said image file and said digital signature derived from said image file by said first and second means.
Claim 2
Dependent Claim
131 words
A digital camera with apparatus for authentication of images produced from an image file taken by said digital camera of a scene, said digital camera having embedded therein a private key unique to said digital camera and a known public key so uniquely based upon said private key that digital data encrypted with said private key may be decrypted using said public key, said digital camera apparatus comprising first means for calculating image hash of said image file using a predetermined algorithm, second means for encrypting said image hash with said embedded private key, thereby producing a digital signature uniquely associated with said image file, and third means for maintaining association of both said image file and said digital signature derived from said image file by said first and second means.
Claim 3
Dependent Claim
174 words
A combination as defined in claim 1 including separate apparatus for authenticating at any time said image file as being free of any alteration using said associated digital signature, said separate apparatus comprising fourth means for decrypting said digital signature, using said public key, thereby deriving a secure image hash identical to said image hash produced by said first means of said digital camera apparatus by calculating image hash of said image file from said digital camera, fifth means for calculating image hash of said image file that has been maintained in association with said digital signature, said fifth means using said predetermined algorithm, and sixth means for comparing said image hash of said image file calculated by said fifth means with said secure image hash from said fourth means to determine authenticity of said image file that has been maintained in association with said digital signature for use of said image file in reproducing an image represented by said image file if both said image file and said secure image file match identically.
Claim 4
Dependent Claim
17 words
A combination as defined in claim 1 wherein said private key is embedded in said second means.
Claim 5
Dependent Claim
13 words
A combination as defined in claim 3 wherein said public key is published.
Claim 6
Dependent Claim
17 words
A combination as defined in claim 4 wherein said public key is published on said digital camera.
Claim 7
Dependent Claim
32 words
A combination as defined in claim 4 wherein said public key is digitally recorded in a border of said image file and is processed through hashing and encryption with said image file.
Claim 8
Dependent Claim
55 words
A combination as defined in claim 6 wherein further information is digitally recorded in said border regarding parameters of said digital camera extant at the time said image file is taken and is processed through hashing and encryption with said image file to assist in reproduction and interpretation of a reproduced image of said scene.
Claim 9
Dependent Claim
31 words
A combination as defined in claim 1 wherein focusing distance is digitally recorded in a border of said image file and is processed through hashing and encryption with said image file.
Claim 10
Dependent Claim
42 words
A combination as defined in claim 1 wherein range from said digital camera to one or more prominent objects in said scene are recorded in a border of said image file and is processed through hashing and encryption with said image file.