LandOfFree - US Patents - Listing for Cryptography,By modifying optical image

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System and method for encrypting sensitive information

Cryptography – By modifying optical image

Patent

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System and method for encrypting sensitive information

Cryptography – By modifying optical image

Patent

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System for encrypting documents with stencils

Cryptography – By modifying optical image

Reexamination Certificate

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System for producing a printable security device image and...

Cryptography – By modifying optical image

Reexamination Certificate

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System for protection of goods against counterfeiting

Cryptography – By modifying optical image

Patent

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System for the secure storage and transmission of data

Cryptography – By modifying optical image

Patent

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Tabular guide decrypting apparatus

Cryptography – By modifying optical image

Patent

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Three-dimensional authentication of microparticle mark

Cryptography – By modifying optical image

Reexamination Certificate

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Variable density verification

Cryptography – By modifying optical image

Reexamination Certificate

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Variable density verification

Cryptography – By modifying optical image

Reexamination Certificate

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Verifiable holographic article

Cryptography – By modifying optical image

Reexamination Certificate

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Virtual shop computer network system which displays member shops

Cryptography – By modifying optical image

Patent

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Watermarking process resilient to collusion attacks

Cryptography – By modifying optical image

Patent

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