Peer-Reviewed Journal Details
Mandatory Fields
Monaghan, DS;Gopinathan, U;Naughton, TJ;Sheridan, JT
2007
September
Journal of Applied Optics
Key-space analysis of double random phase encryption technique
Published
63 ()
Optional Fields
OPTICAL-IMAGE ENCRYPTION FRACTIONAL FOURIER DIGITAL HOLOGRAPHY ALGORITHMS RETRIEVAL ATTACKS PLANE
46
6641
6647
We perform a numerical analysis on the double random phase encryption/decryption technique. The key-space of an encryption technique is the set of possible keys that can Lie used to encode data using that technique. In the case of a strong encryption scheme, many keys must be tried in any brute-force attack on that technique. Traditionally, designers of optical image encryption systems demonstrate only how a small number of arbitrary keys cannot decrypt a chosen encrypted image in their system. However, this type of demonstration does not discuss the properties of the key-space nor refute the feasibility of an efficient brute-force attack. To clarify these issues we present a key-space analysis of the technique. For a range of problem instances we plot the distribution of decryption errors in the key-space indicating the lack of feasibility of a simple brute-force attack. (c) 2007 Optical Society of America.
WASHINGTON
1559-128X
Grant Details