Abstract:
A printer and a method of controlling a printer in order to print out a report relating to data recorded by a tachograph are disclosed, the printer having a supply of printing medium and being equipped with a medium transport device. In the disclosed printer, rest state transport of the printing medium is carried out at periodically repeating intervals.
Abstract:
A method for operating a tachograph having an application controller and a safety controller. A memory is associated with the application controller and a further memory is associated with the safety controller. An encrypted program code having at least one associated signature is made available to the safety controller. The encrypted program code is decrypted by means of the security controller and verified by the at least one signature. It is detected whether the decrypted program code (EPC) is intended for the application controller and/or for the security controller. Depending on what is detected, the program in the memory and/or the further program in the further memory is at least partially replaced by the decrypted program code and, depending on a result of the verification, the at least partially replaced program and/or the at least partially replaced further program is released for executing.
Abstract:
A single-chip computer includes at least one first processor core and at least one second processor core constructed on a common chip. The at least one first and the at least one second processor cores are interconnected via a processor interface. Data can be read via a separate or common memory interface from a separate or common data memory respectively and/or stored in said data memory. The single-chip computer includes an encryption and decryption unit which is assigned to the at least one processor core and which is constructed and functionally arranged between the at least one second processor core and the memory interface in such a way that the data which can be exchanged between the at least one second processor core and the data memory can be encrypted and decrypted by the encryption and decryption unit.
Abstract:
The invention relates to a method for secure data transmission, particularly between a tachograph (51) in a commercial vehicle and memory cards (50), where a first subscriber (T1) has a memory (6, 22) with entries (31-35) comprising identifiers (4) and security certificates (Cert) from second subscribers (T2). Methods for secure data transmission are becoming increasingly important and are frequently associated with a high level of computation complexity. For this reason, the object of the invention is to reduce the computation time for this without security losses. It is proposed that the first subscriber (T1) fetch an identifier (4) from the second subscriber (T2) and compare it with stored identifiers (4). If the identifier (4) matches, a security certificate (Cert) associated with this identifier (4) is the basis for a subsequent data transmission, and if the identifier (4) does not match then security certificate verification is performed.
Abstract:
A digital tachograph has a security module. A public key, a secure private key, and a signage are stored in the security module. Vehicle-relevant data and the corresponding checksum are encoded using a secure private key and stored in the digital tachograph in a data format by the security module.
Abstract:
Data obtained by a tachograph and stored in a memory of the tachograph in a first memory region in a predetermined first data format is processed according to a predetermined processing rule and is stored in a predetermined second data format, which differs from the predetermined first data format, in a second memory region. At least part of the data stored previously in the second memory region is read depending on an inquiry of an external reading unit in relation to the tachograph and is put out via a data interface of the tachograph while maintaining the predetermined second data format.
Abstract:
An assembly has a tachograph and a data memory, in particular a data memory of a data card. The tachograph has an interface designed to exchange data between the tachograph and the data memory, logic function modules and at least one memory. In a method for operating the tachograph, as a result of high security requirements, the data transfer between the data memory and the tachograph is extremely time-intensive. At the start of the data transfer a virtual reproduction of the data memory is created in the memory of the tachograph and the logic function modules first have read and write access to the virtual reproduction in the memory. Data is then regularly written to the data memory of the data card by a write access to the memory, thus eliminating the differences between the virtual reproduction and the data memory.
Abstract:
A method for operating a volatile memory supplied with a supply signal arranged either as a first supply signal of a first supply signal source or a second supply signal of a second supply signal source. If an available first supply signal is present it is used otherwise the second supply signal is used. The supply signal is supplied, based on a switch position of a switching element to the volatile memory. During a detected interrupted first supply signal, the switch position of the switching element is for a predetermined period of time such that the supply signal is supplied to the volatile memory. After expiry of the predetermined period of time, the switch position of the switching element is predetermined such that the volatile memory is decoupled electrically from the supply signal.
Abstract:
A system and method for transmitting data via a transmission path between a tachograph arranged in a vehicle, and a data processing device which is remote from the vehicle. To improve data protection, the transmission takes place via a first path section of the transmission path, which path section is arranged between the tachograph and a communication controller arranged in the vehicle, and a second wireless path section of the transmission path, which path section is arranged between the communication controller and the data processing device. The tachograph in response to an encryption request signal sent from the data processing device to the tachograph encrypts data sent from the tachograph to the data processing device. The data is transmitted in encrypted form from the tachograph to the data processing device both via the first path section and via the second path section.
Abstract:
In a method for transferring data (D) between a first module (1) and a second module (2), data (D) can be transferred from a data memory (4) of the second module (2) to the first module (1) either in a secured or not secured manner. The time required for authentication (IV) is reduced by first transferring first data (D) in a not secured and then in a secured manner, wherein the data being used by means of a processor (CPU) of the first module (1) for a first process (III). The data (D) transferred in a not secured manner are compared with those transferred in a secured manner and if there is a difference, results from the first process (III) are discarded.