An apparatus, method, system, computer program and product, each capable of protecting a document from undesired alteration and undesired reproduction are disclosed. A protected document may be generated from an original document, which is embedded with a first pattern and a second pattern. The first pattern is used for detecting undesired reproduction, while the second pattern is used for detecting undesired alteration. At the time of detection, either one of the first pattern and the second pattern may be extracted to determine whether the original document has been undesirably altered or reproduced.