Giesecke & Devrient Gmbh

Swissbit Ag

Hubertus Grobbel

Michael Baldischweiler

Gisela Meister

Jan Eichholz

Fabian Guter

Marcus Rosin

Hans Aschauer

A method for secure access control to a data storage system for a host apparatus by means of an access control device, the method comprising: as part of a first mode of operation of the access control device, receiving user data from the host apparatus and transmitting it in unmodified or modified form to the data storage system for local storage; exchanging a first cryptographic secret with a computer system to enable encryption of data by the access control device in dependence on the first cryptographic secret; receiving a data read request for at least a portion of the user data stored in the data storage system; in response to the data read request, transitioning the access control device to a second mode of operation in which the access control device is configured to perform read access but not write or delete access to the data storage system; and in the second operating mode, retrieving user data requested according to the data read request from the data storage system, encrypting them using the first cryptographic secret (K) or a key derived therefrom according to a key generation rule and transmitting the user data encrypted in this way to a predetermined user data recipient; wherein the user data is processed as part of the method in such a way that the encrypted user data transmitted as part of the second operating mode represents information which can be extracted from it for the user data recipient and which represents an identity of the access control device and/or of the data storage system or allows a clear conclusion to be drawn therefrom.

Methods and devices for secure access control to a data storage system and for data archiving

A storage medium having an encrypting device, including an electronic memory area, a read-in device, a read-out device, a key memory, in which a secret key is or can be stored, an encrypting device, and a decrypting device. The read-in device is designed to encrypt any data input at the interface for storage in the memory area using the key stored in the key memory and to store said encrypted data in the memory area. The read-out device has a direct read-out channel, by means of which stored encrypted data can be output to the interface in encrypted form by circumventing the decrypting device, and a decrypting read-out channel, by means of which stored encrypted data in the memory area can be decrypted by means of the decrypting device using the key stored in the key memory or a decryption key stored in the key memory and corresponding to the key and can be output to the interface in decrypted form.

Storage medium having an encrypting device

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Munich, Germany

Hubertus Grobbel