An encrypted database interfaced with an ultrafast secure data
communication system using spatial-temporal converters is
proposed. The original spatial signal is optically encrypted, and
the encrypted signal is holographically stored in a storage medium such
as photorefractive materials. The spatially encrypted signal is
sampled to avoid the overlap of each datum at the receiver. The
sampled data are converted into a temporal signal to transmit the
information through an optical fiber. At the receiver the temporal
signal is converted back into the spatially encrypted
signal. Retrieval of the original data can be achieved when the
correct phase key is used in the decryption system. We developed an
expression for encrypted output and decrypted data. We numerically
evaluate the effect of sampling the spatially encrypted signal on the
quality of the decrypted data.
© 2000 Optical Society of America
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