Verifying integrity, authorship of and encoding/decoding text involves using one-time algorithm and/or symmetrical crypto algorithm dependent on one secret code

摘要

The method involves each subscriber having a characterizing identifier, an individual secret code number and using one-time algorithm and/or a symmetrical crypto algorithm, both dependent on the same secret code number. Pairs of identifiers and secret code numbers are stored in a database in a secure module inaccessible by telecommunications.