Joachim Schaaf

Verfahren und Anordnung zur Etablierung eines kostenpflichtigen E-Mail-Dienstes

Verfahren zur Ver- und Entschlüsselung oder Signatur von E-Mails über einen E-Mail-Server

Method for encrypting, decrypting or signing of emails using an email server

Digital document or data e.g. video, marking method for use in Internet, involves producing electronic signature of characteristic, current time, and identification code, merging signature with data, and providing data over network

Digital data encoding method for verifying execution of encoding in digital rights management system, involves legal encoder, which inserts content provider to interconnect digital data to multiple users

Method and system for establishing a billable electronic mail service

Method for introducing a digital mark into a digital document

Coded digital video data marking method, involves coding digital data using coding algorithm so that positions of uncoded digital data indication is allocated to positions of coded digital data indication

Coded digital data e.g. audio data, marking method for computer, involves including information in uncoded digital data in one position, coding modified data with coding algorithm, and storing position in modified coded data

Verfahren zur einbringung einer digitalen markierung in ein digitales dokument