TY - GEN
T1 - Geometric shape effects in redundant keys used to encrypt data transformed by finite discrete radon projections
AU - Kingston, Andrew
AU - Svalbe, Imants
PY - 2005
Y1 - 2005
N2 - The Finite discrete Radon Transform (FRT) represents digital data exactly and without redundancy. Redundancy can however be injected into the FRT by reserving part of the image area to be replaced by a key that contains pixels of known, fixed values. The resulting image redundancy can be used to watermark values into the image, or as an encryption key that must be known if the image data is to be recoverable from a subset of transmitted projections. This paper looks at the affect the geometry of the selected key areas has on the interaction between the FRT projections of the key area and those of the data area. A method is proposed to measure this interaction of projected values. Results for simple key geometries are obtained. These give some insight into the design of key shapes that optimise the coupling of projected key and image values.
AB - The Finite discrete Radon Transform (FRT) represents digital data exactly and without redundancy. Redundancy can however be injected into the FRT by reserving part of the image area to be replaced by a key that contains pixels of known, fixed values. The resulting image redundancy can be used to watermark values into the image, or as an encryption key that must be known if the image data is to be recoverable from a subset of transmitted projections. This paper looks at the affect the geometry of the selected key areas has on the interaction between the FRT projections of the key area and those of the data area. A method is proposed to measure this interaction of projected values. Results for simple key geometries are obtained. These give some insight into the design of key shapes that optimise the coupling of projected key and image values.
KW - Data encryption
KW - Discrete image processing
KW - Discrete Radon transform
KW - Error correcting code
UR - http://www.scopus.com/inward/record.url?scp=33846995443&partnerID=8YFLogxK
U2 - 10.1109/DICTA.2005.1578114
DO - 10.1109/DICTA.2005.1578114
M3 - Conference contribution
AN - SCOPUS:33846995443
SN - 0769524672
SN - 9780769524672
T3 - Proceedings of the Digital Imaging Computing: Techniques and Applications, DICTA 2005
SP - 102
EP - 109
BT - Proceedings of the Digital Imaging Computing
T2 - Digital Imaging Computing: Techniques and Applications, DICTA 2005
Y2 - 6 December 2005 through 8 December 2005
ER -