Anti-counterfeiting marking with dual-code and partial concealment

摘要: An anti-counterfeiting method associates the first code with an article to be authenticated identify article, and a second as confirmation verify code. Both are reproduced on article. The is overt while covert concealed from normal viewing by concealment means such scratch-off material. authorized person (e.g., consumer) allowed conditionally remove reveal revealed used authenticity of product verification center. During verification, identifies verifies test associated