Method for providing secure transmission of information

Details Method for providing secure transmission of information Method for providing secure transmission of information

H - Electricity

04

L

H04L 9/28 (2006.01) H04L 9/08 (2006.01)

Patent

CA 2272505

Described is a method for providing secure transmission of information between at least two users of a telecommunications network, using a secret, random, binary key of great length that is used only once for purposes of encryption. This key is generated in a key generator (10), for example by means of an optical random generator with a beam splitter, and is preferably accessible to the public; this key is read onto at least two transportable data carriers (12), for example, CDs, and is then issued in this form to the users, each of which receives a data carrier (12) with the key read onto it. There is no additional storage of the key. The users then install this key carrier (12) into reading devices (14) that are associated with the telecommunications terminal devices (16), such as telephones, facsimile apparatuses, or PCs, that are being used by the users. When a connection is being set up, correct installation of the key and its matching are checked by logistics devices (18) that are each similarly associated with the telecommunications terminal devices (16); during encryption and decryption of the information that is to be transmitted, the logistics devices (19) check for synchronization of the keys or at least the part of said keys that has been input. A system for implementing this method with the devices required for this purpose is also described.

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