Method for providing message document security by deleting predetermined header portions and attaching predetermined header portions when seal is validly associated with message or document

US5832227A · kind A · utility

Assignee

• The Commonwealth of Australia of Anzak Park · AU

Inventors

• Mark Stephen Anderson · Salisbury, AU
• John Desborough Yesberg · Salisbury, AU
• Michael Pope · Fredenbeck, DE
• Lisa Nayda · Salisbury, AU
• Ken Hayman · Salisbury, AU
• Brendan Beahan · Salisbury, AU

Key dates

• Filing date: Aug 18, 1995
• Grant date: Nov 3, 1998
• Expiry date: Aug 18, 2015

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N2201/3278
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The disclosure of the current invention describes a method of handling a message or a document to be released external of a secure computer environment. The message or the document is first directed to a trusted sealing device which displays the message or the document to a human user for visual checking. If the message or document is acceptable to the human user, the method associates the message or the document with a seal produced by the trusted sealing device. The message or the document is then directed along with the associated seal to a gateway which deletes portions of the header and checks the validity of the associated seal. If, as a result of this verification, it is determined that the associated seal is validly associated with the message or the document, the method attaches predetermined header portions to the message or document and communicates the message or the document from the secure computer environment.