Methods and tangible objects employing machine readable data in photo-reactive materials
First Claim
Patent Images
1. A method comprising:
- obtaining auxiliary data;
providing a mask for a photo-reactive material, the mask corresponding at least in part to the auxiliary data; and
exposing the material through the mask to steganographically impart the auxiliary data in the photo-reactive material, the auxiliary data being machine-readable from the exposed material.
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Abstract
The present invention relates generally to steganography and data hiding. In one implementation we provide a method including: obtaining auxiliary data; providing a mask for a photo-reactive material, the mask corresponding at least in part to the auxiliary data; and exposing the material through the mask to steganographically impart the auxiliary data in the photo-reactive material. The auxiliary data is machine-readable from the exposed material. In another implementation the material is exposed through photolithographic illumination. Of course, other implementations are described and claimed as well.
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Citations
15 Claims
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1. A method comprising:
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obtaining auxiliary data; providing a mask for a photo-reactive material, the mask corresponding at least in part to the auxiliary data; and exposing the material through the mask to steganographically impart the auxiliary data in the photo-reactive material, the auxiliary data being machine-readable from the exposed material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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obtaining information; curing a photo-reactive material to steganographically impart the information in the photo-reactive material, the information being machine-readable from the cured photo-reactive material. - View Dependent Claims (10, 11, 12, 13)
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14. A method comprising:
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obtaining auxiliary data; providing a mask for a photo-reactive material, the mask corresponding at least in part to the auxiliary data; and curing the material through the mask to steganographically impart the auxiliary data in the photo-reactive material, the auxiliary data being machine-readable from the cured material.
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15. A method comprising:
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obtaining information; exposing a photo-reactive material to steganographically impart the information in the photo-reactive material, the information being machine-readable from the exposed photo-reactive material.
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Specification