Infineon Technologies Ag

Franz Klug

Steffen Sonnekalb

Berndt Gammel

Thomas Kuenemund

Oliver Kniffler

Michael Goessel

Bernd Meyer

Marcus Janke

Peter Laackmann

Gerd Dirscherl

Gunther Fenzl

Stefan Rueping

Thomas Kunemund

Andreas Wenzel

Dietmar Scheiblhofer

Jorge Guajardo Merchan

Dirk Rabe

Florian Mendel

Benedikt Driessen

According to various embodiments, a data processing device is provided including a memory configured to represent each data word of a plurality of data words in the form of at least two respective shares, a logic circuit, an input circuit configured to provide input shares to the logic circuit depending on a control sequence specifying a sequence of real operations and dummy operations, wherein the logic circuit is configured to process the input shares to generate at least two processing result shares according to a predetermined logic function and an output circuit configured to output the at least two processing result shares if the control sequence specifies the current operation as a real operation and refresh the at least two shares of the one of the data words with the processing result shares if the control sequence specifies the current operation as a dummy operation.

Data processing device and method for processing secret data

According to one embodiment, an integrated electronic circuit has a switching network configured to receive binary control states, one or more secret-carrying gates, wherein each secret-carrying gate represents Boolean secrets and is configured to receive binary input states and to output one or more Boolean secrets according to a state sequence of the binary input states, and one or more flip-flops configured to store binary output states output by the switching network and to supply binary input states to the one or more secret-carrying gates based on the stored binary output states. The switching network generates the binary output states by combining the binary control states and Boolean secrets output by the one or more secret-carrying gates. The integrated electronic circuit outputs Boolean secrets from the one or more secret-carrying gates and/or the binary output states from the switching network to another integrated electronic circuit.

Integrated electronic circuit

A method of sending data is provided. The method may include, executed in a master, applying a first code to an address of an addressed data sink of a slave, thereby forming a master-encoded address, combining the data with the master-encoded address using a reversible function, thereby forming a data-address-combination, and sending the data-address-combination and the address from the master to the slave.

Data encryption and verification between master and slave

A zero detection circuit includes a chain of masked OR circuits. Each masked OR circuit includes data inputs. Each data input is configured to receive a respective data input bit. Each masked OR circuit further includes an input mask input to receive one or more input masking bits, an output mask input to receive an output masking bit and a data output. The zero detection circuit is configured to output a bit equal to an OR combination, masked with the output masking bit, of the data input bits, each demasked with an input masking bit of the one or more input masking bits. One of the inputs of each masked OR circuit except the first masked OR circuit of the chain of masked OR circuits is coupled to the data output of the masked OR circuit preceding the masked OR circuit in the chain of masked OR circuits.

Zero detection circuit and masked boolean or circuit

A cryptographic processor is described comprising a processing circuit configured to perform a round function of an iterated cryptographic algorithm, a controller configured to control the processing circuit to apply a plurality of iterations of the round function on a message to process the message in accordance with the iterated cryptographic algorithm and a transformation circuit configured to transform the input of a second iteration of the round function following a first iteration of the round function of the plurality of iterations and to supply the transformed input as input to the second iteration wherein the transformation circuit is implemented using a circuit camouflage technique.

Cryptographic processor, method for implementing a cryptographic processor and key generation circuit

A processor arrangement is provided. The processor arrangement includes: a first processor; a plurality of second processors, each second processor including a bit-mask generator configured to generate a processor-specific bit-mask sequence; wherein the first processor includes a bit-mask generator configured to generate the processor-specific bit-mask sequences of the second processors; wherein the first processor is configured to bit-mask a data bit sequence to be transmitted to one second processor of the plurality of second processors using a processor-specific bit-mask sequence specific to the one second processor, to thereby generate a processor-specific bit-masked data sequence to be transmitted to the one second processor.

Processor arrangements and a method for transmitting a data bit sequence

A circuit capable of being operated in a first and a second mode of operation comprises a storage location adapted to store at least a first state, a second state and a third state, wherein the circuit is adapted to switch to the first mode of operation when the storage location acquires the first or the third state, and wherein the circuit is adapted to switch to the second mode of operation when the storage location acquires the second state.

Circuit with a plurality of modes of operation

A processing unit having a control unit configured to execute after a reset phase a sequence of test instructions to detect a manipulation of the processing unit before the control unit decodes a first instruction for a normal operation.

Processing unit that detects manipulations thereof, device comprising two processing units, method for testing a processing unit and a device comprising two processing units

A compiling device for generating a second program sequence from a first program sequence comprises a recognizer for recognizing a first subarea and a second subarea of the first program sequence, and a selector for selecting instructions from a set of instructions of the second program sequence formed to select only instructions of a first security category for mapping a functionality of the first subarea and to select instructions of the second security category for mapping a functionality of the second subarea. Additionally, the compiling device comprises a generator for generating the second program sequence from the instructions selected.

Compiler and method for compiling

A circuit arrangement comprising a logic circuit to be tested and a test circuit. The logic circuit comprising logic-circuit-internal combinations configured to generate output data from input data based on a predetermined relationship. The logic circuit is configured to detect whether the relationship is satisfied and to provide an error signal if the relationship is not satisfied. The test circuit is configured to alter logic-circuit-internal combinations, to detect the error signal, and to output an alarm signal if the error signal is not detected upon alteration of the logic-circuit-internal combinations.

Circuit arrangement and method for checking the function of a logic circuit in a circuit arrangement

An error detection device for a command decoder is described, the command decoder reading out an associated sequence of control signal words from a command memory based on an input word, wherein the sequence of control signal words has at least one control signal word, having: a controller designed to provide the input word at a first time and the input word at a second time for reading out the command memory, wherein the second time is delayed with respect to the first time, to effect a readout of the sequence of control signal words at a first time and a readout of the sequence of control signal words at a second time; and a comparator designed to receive and compare the associated sequences of control signal words read out at the first and second times, and to output a signal indicating an error if the associated sequences of control signal words read out at the first and second times are different.

Error detection device and method for error detection for a command decoder

An error detection device for an address decoder converting an input address to an associated output address out of a plurality of valid output addresses using a 1-out-of-n decoder, the error detection device including a regenerator for generating a regenerated address on the basis of the output address from the 1-out-of-n decoder, and a comparer for receiving the input address and the regenerated address and to output a signal, on the basis of a comparison of the input address and the regenerated address, which indicates an error in the conversion of the input address to the output address if the input address and the regenerated address do not match, and which indicates an error-free conversion of the input address to the output address if the input address equals the regenerated address.

Error detection device for an address decoder, and device for error detection for an address decoder

Circuit arrangement for secure data processing for program data with a protected data record. An internal memory provides a protected data record having instruction words and a first check word associated with the instruction words. An arithmetic and logic unit has an input coupled to the internal memory and outputs the first check word from the applied protected data record. A checking apparatus has an input coupled between the internal memory and the arithmetic and logic unit, and allocates a second check word to the instruction words in the protected data record. A comparison apparatus has respective inputs coupled to the checking apparatus and the arithmetic and logic unit, and compares the first check word with the second check word, and outputs an alarm signal when the first check word does not match the second check word.

Circuit arrangement and method for secure data processing

A calculating unit for performing an arithmetic operation with at least two operands, the at least two operands being encrypted, includes an arithmetic-logic unit with a first input for the first encrypted operand, a second input for the second encrypted operand, a third input for an encryption parameter and an output for an encrypted result of the operation, the arithmetic-logic unit being formed so as to operate on the first input, the second input and the third input by means of arithmetic sub-operations, while considering the type of encryption of the operands, such that at the output, an encrypted result is obtained which equals a value that would be obtained if the first operand was subjected to the arithmetic operation in a non-encrypted state and if the second operand would be subjected to the arithmetic operation in a non-encrypted state, and a result obtained was subsequently encrypted, no decryption of the operands being performed in the arithmetic-logic unit. In this manner, a processor system may be obtained in which no data whatsoever occurs in clear text, i.e. in a non-encrypted form, since no decryption upstream of an arithmetic-logic unit and no encryption downstream of the arithmetic-logic unit are required, as the arithmetic-logic unit operates with encrypted input operands to obtain an encrypted result. Interception attacks on transmission lines of the calculating unit are thus ruled out.

Calculating unit and method for performing an arithmetic operation with encrypted operands

Circuit having a bus, a first receiver circuit part coupled to the bus for processing a signal on the bus, a second receiver circuit part coupled to the bus for processing a signal on the bus, a transmitter circuit part coupled to the bus for outputting a signal on the bus, and a unit for preventing processing a signal on the bus by the first receiver circuit part in response to a control signal.

Growing community of inventors

Munich, Germany

Franz Klug