Invention Grant
US07357333B2 Mechanism for storing authenticity information about a written or printed document 失效
存储关于书面或印刷文件的真实性信息的机制

Mechanism for storing authenticity information about a written or printed document
Abstract:
A mechanism for storing authenticity information about a written or printed document. This authenticity information may be stored in a publicly-accessible database. When a document patterned with electronic ink is to be verified, the verifier examines the electronic ink under magnification. The verifier locates start and end pattern markers within the ink, and extracts the pattern from the ink. Once the pattern is obtained, the verifier performs a lookup of the pattern in the database. If the pattern is found, the verifier obtains information associated with the pattern from the database. The verifier may then use this information to verify the authenticity of the document.
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