Journal
OPTICS LETTERS
Volume 26, Issue 10, Pages 678-680Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.26.000678
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We present a method for securing and encrypting information optically by use of totally incoherent illumination. Encryption is performed with a multichannel optical processor working under natural (both temporal and spatially incoherent) light. In this way, the information that is to be secured can be codified by use of color signals and self-luminous displays. The encryption key is a phase-only mask, providing high security from counterfeiting. Output encrypted information is recorded as an intensity image that can be easily stored and transmitted optically or electrically. Decryption or authentication can also be performed optically or digitally. Experimental results are presented. (C) 2001 Optical Society of America.
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