1. System for digital analysis of the authenticity and integrity of documents using handheld devices comprising: A central processing unit or CPU ( 110 ) used to execute the instructions needed for encoding and decoding of information hidden in the image of ETCODE; A digital camera to capture the image of ETCODE; Storage means ( 112 ) for storing information associated with documents; Information input devices ( 113 ), which intercept the events of the keyboard, touch screen or mouse; Audio Components ( 114 ), responsible for capturing and playing back sounds; Connectivity component ( 115 ) that allows users to connect to a remote database that has the information between the ETCODE and its corresponding document, and display means ( 116 ) responsible for displaying the image information and perform the ETCODE of frames captured by digital camera shot, creating an image of ETCODE corresponding to the document, then capturing the image of this ETCODE hardcopy of the document and performing validation at the end thereof.