Spansion Llc.

Gemplus

Helena Handschuh

Elena Vasilievna Trichina

Arnaud Boscher

Joël Le Bihan

Jimmy K Lau

Nicolas Prawitz

Christophe Carvounas

Frederic Cherpantier

Vincent Cedric Colnot

Systems and methods for effectively protecting data against differential fault analysis involved in Rivest, Shamir, and Adleman ('RSA') cryptography using the Chinese Remainder Theorem ('CRT') are described herein. A CRT RSA component facilitates modular exponentiation of a received message, and a verification component reconstructs the received message. An exponentiation component performs a first modular exponentiation and a second modular exponentiation of the received message. A recombination component performs a recombination step utilizing CRT computation as a function of the first and second modular exponentiations. A modular exponentiation component performs first and second public exponent derivations as a function of a private exponent. The verification component can reconstructs the received message as a function of the first and second public exponent derivations. The verification component calculates the received message utilizing Chinese Remainder Theorem computation.

Method for protecting data against differntial fault analysis involved in rivest, shamir, and adleman cryptography using the chinese remainder theorem

Systems and/or methods that facilitate secure electronic communication of data are presented. A cryptographic component facilitates securing data associated with messages in accordance with a cryptographic protocol. The cryptographic component includes a randomized exponentiation component that facilitates decryption of data and generation of digital signatures by exponentiating exponents associated with messages. An exponent is divided into more than one subexponent at an exponent bit that corresponds to a random number. Exponentiation of the first subexponent can be performed based on a left-to-right-type of exponentiation algorithm, and exponentiation of the second subexponent can be performed based on a right-to-left square-and-multiply-type of exponentiation algorithm. The final value is based on the exponentiations of the subexponents and can be decrypted data or a digital signature, which can be provided as an output.

Cryptographic system with modular randomization of exponentiation

Systems, devices and/or methods that facilitate mutual authentication for processor and memory pairing are presented. A processor and a suitably equipped memory can be provided with a shared secret to facilitate mutual authentication. In addition, the memory can be configured to verify that the system operating instructions have not been subjected to unauthorized alterations. System integrity can be ensured according to the disclosed subject matter by mutual authentication of the processor and memory and verification of the authenticity of system operating instructions at or near each system power up. As a result, the disclosed subject matter can facilitate relatively low complexity assurance of system integrity as a replacement or supplement to conventional techniques.

Memory device and chip set processor pairing

Systems and methods that facilitate securing data associated with a memory from security breaches are presented. A memory component includes nonvolatile memory, and a secure memory component (e.g., volatile memory) used to store information such as secret information related to secret processes or functions (e.g., cryptographic functions). A security component detects security-related events, such as security breaches or completion of security processes or functions, associated with the memory component and in response to a security-related event, the security component can transmit a reset signal to the secure memory component to facilitate efficiently erasing or resetting desired storage locations in the secure memory component in parallel and in a single clock cycle to facilitate data security. A random number generator component can facilitate generating random numbers after a reset based on a change in scrambler keys used by a scrambler component to descramble data read from the reset storage locations.

Instant hardware erase for content reset and pseudo-random number generation

Systems and/or methods that facilitate secure electronic communication of data are presented. A cryptographic component facilitates data encryption, data decryption, and/or generation of digital signatures, associated with messages. The cryptographic component includes a randomized exponentiation component that facilitates decryption of data and/or generation of digital signatures by exponentiating exponents associated with messages. A random number is generated and utilized to randomize the value of a message. After an exponentiation is performed on the randomized message value, intermediate results can be analyzed to determine if there was error in the exponentiation. If there was no error in the exponentiation, a final value of the exponentiation is determined and provided as output as decrypted data or a digital signature; if there is error, an 'error' output can be provided.

Randomized RSA-based cryptographic exponentiation resistant to side channel and fault attacks

Systems and/or methods that facilitate security of data are presented. A random number generation component generates random numbers based in part on electron activity in a select memory cell(s) to facilitate data security. Sensor components that are highly sensitive can be employed to sense activity of the select memory cell(s) and/or reference memory cell in a noise margin associated with respective memory cells in the memory component. The activity of the select memory cell is compared to the reference memory cell(s) to facilitate generating binary data. The binary data is provided to the random number generation component where the binary data is evaluated to determine whether a predetermined level of entropy exists in the binary data. The binary data, or a portion thereof, can be processed to generate random numbers that are utilized in cryptographic processes and/or as a physical signature to facilitate data security.

Random number generation through use of memory cell activity

The present invention concerns a countermeasure method in an electronic component using a public key cryptography algorithm based on the use of elliptic curves. From a private key d and a number of points n on an elliptic curve, a new deciphering integer d' is calculated. The present invention applies particularly to any existing electronic component, such as a smart card.

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Paris, France

Helena Handschuh