Stmicroelectronics S.r.l.

Hewlett-Packard Development Company, L.p.

Stmicroelectronics Gmbh

Stmicroelectronics S.a.

Proton World International N.v.

Stmicroelectronics Application Gmbh

Ecole Nationale Superieure Des Mines De Saint-Etienne

Porton World International N.v.

Guido Marco Bertoni

Pasqualina Fragneto

Gerardo Pelosi

Fabio Sozzani

Liqun Chen

Keith Alexander Harrison

Ruggero Susella

Roberto Valerio Sannino

Jefferson Eugene Owen

Joan Daemen

Marco Macchetti

Luca Breveglieri

Roberto Colombo

William Orlando

Gilles Van Assche

Stefano Marchesin

Roberta Vittimani

Yannick Teglia

Pierre-Yvan Liardet

Fabrice Romain

Massimo Ratti

Filippo Melzani

Andrew Marsh

Fabio Tota

Moris Ravasio

Reouven Elbaz

Umberto Bondi

Andrea Palomba

A method performs cryptographic operations on data in a processing device. An iterative operation between a first operand formed by a given number of words and a second operand using a secret key is performed. The iterative operation includes, for each bit of the secret key, applying one of a first set operations and a second set of operations to the first operand and to the second operand depending on of the bit, and conditionally swapping words of the first and the second operand based on a control bit value obtained by applying a logic XOR function to a random bit.

Method for performing cryptographic operations in a processing device, corresponding processing device and computer program product

A scalar multiplication operation includes an iterative procedure performing a set of operations at each iteration on a bit or on a group of consecutive bits of a secret key. The multiplication operation includes multiplying values of projective format coordinates by a random value. The random value is a product of a random number generated over a range having as end value a first value, with a second value, which is larger than said first value. The first value is a power of two of a word size multiplied by a multiplier value, minus one. The second value is equal to a power of two of a number of bits of the coordinates divided by the first value. The multiplier value is an integer greater than or equal to one and smaller than a ratio of said number of bits to the word size.

Method for performing cryptographic operations on data in a processing device, corresponding processing device and computer program product

A processing system includes a first processing unit; a second processing unit; and a cryptographic coprocessor communicatively coupled to the first processing unit and the second processing unit. The cryptographic coprocessor includes a key storage memory for storing a cryptographic key; a first interface configured to receive source data to be processed directly from the first processing unit; a hardware cryptographic engine configured to process the source data as a function of the cryptographic key stored in the key storage memory; a second interface configured to receive a first cryptographic key directly from the second processing unit; and a hardware key management circuit configured to store the first cryptographic key in the key storage memory.

Processing system, related integrated circuit, device and method

A hardware secure module includes a processing unit and a cryptographic coprocessor. The cryptographic coprocessor includes a key storage memory; a hardware key management circuit configured to store a first cryptographic key in the key storage memory; a first interface configured to receive source data to be processed; a second interface configured to receive the first cryptographic key from the processing unit for storing in the key storage memory; a hardware cryptographic engine configured to process the source data as a function of the first cryptographic key stored in the key storage memory; and a third interface configured to receive a second cryptographic key. The hardware secure module further includes a non-volatile memory configured to store the second cryptographic key; and a hardware configuration module configured to read the second cryptographic key from the non-volatile memory and send the second cryptographic key to the third interface.

Hardware secure module, related processing system, integrated circuit, device and method

Disclosed herein is a lighting system including a bulb. The bulb includes a phosphor plate, and a scanning projector to emit a beam of collimated light and scan the beam of collimated light across the phosphor plate to thereby cause emission of light by portions of the phosphor plate impinged upon by the beam of collimated light. Control circuitry wirelessly receives configuration data and modulates the beam of collimated light during scanning so that the scanning forms a projection pattern on the phosphor plate. A control system is spaced apart from the bulb and processes the initial configuration data, and wirelessly sends the configuration data to the control circuitry of the bulb. A mobile wireless communications device wirelessly sends initial configuration data to the control system.

Smart bulb system

A method of performing a cryptographic operation including: receiving a plurality of binary input values; splitting the binary input values into a plurality of non-binary digits of base r, where r is an integer greater than 2 and not equal to a power of 2; and performing, by a cryptographic block on each of the plurality of non-binary digits, a different modulo r operation to generate at least one output digit) of base r.

Method and circuit for cryptographic operation

An embodiment concerns a method for encrypting a message through a cryptographic algorithm including a computation of a mathematical function including the computation of one or more modular multiplications. Such a cryptographic algorithm has a respective module. The method, carried out with an electronic device, includes: providing a first parameter; generating a random number; calculating a Montgomery parameter based on said first parameter and on a integer multiple of said random number; generating a representation of the message to be encrypted in a Montgomery domain through a Montgomery conversion function applied to the message and to the Montgomery parameter; carrying out the calculation of the mathematical function on the message represented in the Montgomery domain.

Method for encrypting a message through the computation of mathematical functions comprising modular multiplications

An embodiment of an apparatus has a closed housing accommodating an element to be protected, and a pressure sensor coupled to a control unit configured to detect pressure variations within the housing upon opening the housing. The control unit is configured to activate countermeasures upon detecting opening of the housing. For example, the apparatus may be a set-top box, a cell phone, a television set, a printer ink cartridge of toner cartridge, or a meter, wherein the element to be protected is a semiconductor chip and relevant couplings, storing an enabling code or key.

Apparatus having a housing, with intrusion detection

A method for generating a digital signature includes calculating a first magnitude representative of the inverse of a random number raised to the power two; obtaining a first element of the digital signature by executing scalar multiplication between an established point of the elliptic curve and the random number; obtaining a second magnitude by executing modular multiplication, with modulus corresponding to the established elliptic curve's order between the first magnitude and the secret encryption key; obtaining a third magnitude by executing a modular multiplication, with modulus corresponding to the established elliptic curve's order between the random number and the secret encryption key; obtaining a first addend of a second element of the digital signature by executing a modular multiplication, with modulus corresponding to the established elliptic curve's order between the second magnitude and the third magnitude; and generating a second element of the digital signature based on the first addend.

Method for generating a digital signature

An authentication method of a first module by a second module includes the steps of generating a first random datum by the second module to be sent to the first module, generating a first number by the first module starting from the first datum and by way of a private key, and generating a second number by the second module to be compared with the first number, so as to authenticate the first module. The step of generating the second number is performed starting from public parameters and is independent of the step of generating the first number.

Authentication method

An encoding/decoding apparatus comprises a central processing unit and an encryption/decryption accelerator coupled to the central processing unit. The accelerator comprises an input for input data to be encrypted/decrypted, an arithmetic logic unit coupled to said input for performing selectable operations on data obtained from said input data and an output for encrypted/decrypted data coupled to said arithmetic logic unit.

Encoding/decoding apparatus

Data are converted between an unencrypted and an encrypted format according to the Rijndael algorithm, including a plurality of rounds. Each round is comprised of a fixed set of transformations applied to a two-dimensional array, designating states, of rows and columns of bit words. At least a part of the transformations are applied on a transposed version of the state, wherein rows and columns are transposed for the columns and rows, respectively.

Method and circuit for data encryption/decryption

A method pairs electronic equipment, particularly, in a wireless network system. The method includes: providing first and second wireless electronic equipment to be paired which store a first and a second public key, respectively, and providing a user with a wireless portable electronic device which stores a third public key. Then, the portable electronic device transmits the third public key in turn to the first and second electronic equipment, and receiving from the first and second equipment the first and second public keys, respectively. Moreover, the portable electronic device calculates first and second numbers starting from the first and second public keys, respectively. The same first and second numbers is independently calculated by the first and second electronic equipment, respectively, starting from the third public key and representing secret numbers shared between the portable device and the first and second electronic equipment. Finally, the portable device provides a secure communication key to be transmitted in turn to the first and second equipment through encryption with the first and second secret numbers, respectively.

Method for pairing electronic equipment in a wireless network system

A method of processing information to be confidentially transmitted from a first module to a second module provides that a first scalar multiplication may be carried out in order to obtain a first result [r]P. This first scalar multiplication comprises a plurality of generation steps of ordered factors from which a plurality of first partial sums are required to be built. The method also comprises the carrying out of a second scalar multiplication in order to obtain a second result. This second multiplication provides that a plurality of second partial sums may be built. A piece of encrypted information is obtained by processing the information based on the results of the scalar multiplications. The second partial sums of the second scalar multiplication use the same ordered factors obtained by the generation step of the first scalar multiplication.

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Cusano Milanino, Italy

Guido Marco Bertoni