Abstract: A method for protecting a digital document and user data typed into a digital document is presented. The method comprises computation of an authentication tag when the document is sent from a server. A similar authentication tag is computed when the document is shown on a client. When another document referenced in the document is requested by the client from the server, the authentication tag computed by the client is attached to the request for that other document. The server receiving the request compares the authentication tag it computed with the one it received to verify if the request came from an authentic copy of the document. The method is suitable for protection of online banking, online investment, online shopping, and other electronic applications.

Abstract: A method for detecting if a digital document (e.g. an HTML document) is changed by others than authenticated script code (e.g. JavaScript code) is presented. The method includes loading the authenticated script code into a trusted computer application and storing a snapshot of the digital document in the trusted computer application. Before the authenticated script code is executed, the snapshot of the digital document is compared with the document to verify if the digital document is still authentic. After executing the authenticated script code, the snapshot of the digital document is replaced with an up-to-date copy reflecting eventual changes made to the digital document by the executed script code. The digital document can then at any time be compared with the most recent snapshot to verify if it is authentic.

Abstract: A method for protecting a digital document and user data typed into a digital document is presented. The method comprises computation of an authentication tag when the document is sent from a server. A similar authentication tag is computed when the document is shown on a client. When another document referenced in the document is requested by the client from the server, the authentication tag computed by the client is attached to the request for that other document. The server receiving the request compares the authentication tag it computed with the one it received to verify if the request came from an authentic copy of the document. The method is suitable for protection of online banking, online investment, online shopping, and other electronic applications.

Abstract: A method for detecting if a digital document (e.g. an HTML document) is changed by others than authenticated script code (e.g. JavaScript code) is presented. The method includes loading the authenticated script code into a trusted computer application and storing a snapshot of the digital document in the trusted computer application. Before the authenticated script code is executed, the snapshot of the digital document is compared with the document to verify if the digital document is still authentic. After executing the authenticated script code, the snapshot of the digital document is replaced with an up-to-date copy reflecting eventual changes made to the digital document by the executed script code. The digital document can then at any time be compared with the most recent snapshot to verify if it is authentic.