SAFER COMMUNICATION IN A COMMUNICATION NETWORK

摘要

portable electronic auxiliary device (10, 12) to enable secure encrypted communication between end devices, in particular smartphones (2, 4), tablets and/or PCs, a communication network, in particular an instant messaging network, where the auxiliary device (10, 12) in/on a housing includes the following components:a processor,-a reading book,a reading memory,-a display,-a data input unit,a power source,-a camera where there is no activatable interface to mobile networks and the Internet and where the read memory contains operating system software which provides at least the following functions:Creation and display of an optical code from a public key stored in the read-write memory,Import of public keys from communication partners by scanning associated optical codes with the camera,Encryption of a message entered via the data input unit with one of the public keys and creation and display of an associated optical codeScan optical codes with the camera and decrypt encrypted messages from a communication partner contained therein.