Stmicroelectronics S.r.l.

Proton World International N.v.

Francesco Caserta

Michael Peeters

Amedeo Veneroso

Thierry Simon

A method for concealing a subscription identifier at a user equipment including a mobile equipment and an integrated circuit card storing the subscription identifier, the method including receiving a corresponding request by a server to provide a corresponding subscription identifier, performing an elliptical curve encryption of the subscription identifier generating a concealed subscription identifier, the concealing operation including the mobile equipment sending an identity retrieve command to the card, performing, before receiving the identity retrieve command at the card, a pre-calculation of the ephemeral key pair including an ephemeral private key and ephemeral public key and the shared secret key, and in response to the respective state of completion indicating that completion of the computation of a valid ephemeral key pair or shared secret key, storing the corresponding values of the ephemeral key pair and shared secret key in a table in a memory of the card.

Method for concealing a subscription identifier at a user equipment of a mobile communication network, and corresponding system and computer program product

A method of managing an integrated circuit memory includes identifying a set of allocated regions and a set of empty regions spanning a memory space of an integrated circuit card, selecting the biggest empty region of the set of empty regions, determining that an allocated memory block of an allocated region immediately adjacent to the biggest empty region is larger than the biggest remaining empty region of the memory space, storing the allocated memory block in a temporary list of skipped memory blocks, removing the allocated memory block from the set of allocated memory regions, and swapping the allocated memory block with a remaining empty region to widen the biggest empty region.

Method for reducing non-volatile memory fragmentation in integrated circuit cards, corresponding card and apparatus

Cryptographic circuitry, in operation, generates N first pairs of elliptic curve cryptography (ECC) keys r(i), R(i), with i varying from 1 to N, using K second pairs of ECC keys p(k), P(k), with k varying from 1 to K, wherein K is smaller than N. Each pair r(i), R(i) of the first pairs of keys is a linear combination of pairs of the second pairs of ECC keys according to: wherein A(i,j) designates a general term of a matrix A of size N*K, and all the sub-matrices of size K*K are invertible. The cryptographic circuitry, in operation, executes cryptographic operations using one or more pairs of the first pairs of ECC keys.

Keys for elliptic curve cryptography

A method of managing an integrated circuit memory includes having an integrated circuit card with a memory space including memory space regions for storing user profile data. The memory space is partitioned into segments of memory space regions, where the segments of memory space regions includes allocated regions and empty regions. From the empty regions, the biggest empty region of the memory space is selected. The selected biggest empty region is widened by moving memory blocks positioned in a subset of allocated regions that are at boundaries of the selected biggest empty region into other available empty regions.

Method of managing integrated circuits cards by widening the biggest empty region, corresponding card and apparatus

A method for sharing a same profile on different integrated circuit cards includes performing a profile enable procedure for a first profile on a first mobile device; performing a mobile device authentication procedure between the first mobile device and the mobile network; and performing by the mobile network, a location update operation using identifier information including subscriber information.

Method for sharing a mobile operator profile in integrated circuit cards, and corresponding system and computer program product

A method for transmitting an Internet Protocol (IP) data packet from a first device to a second device, includes: transmitting a message from the first device to a telephone number associated with the second device; receiving the message at the second device and, in response to the message, determining a first IP address of the first device and transmitting a first IP packet from the second device to the first IP address; receiving the first IP packet at the first device and determining a source IP address of the first IP packet; and transmitting a second IP packet from the first device to the source IP address of the first IP packet.

Method for transmitting at least one IP data packet, related system and computer program product

An integrated circuit card with a memory space includes memory space locations for storing user profile data of a plurality of user profiles. The memory space can be partitioned in segments of memory space locations. A segment map includes segment map memory locations with the memory space locations in the memory space coupled to respective segment map memory locations in the segment map. The memory space locations in the memory space can be allocated to the user profile data by recording in the respective segment map memory locations in the segment map the profile in the plurality of user profiles to which the memory space locations in the memory space are reserved.

Method of managing integrated circuit cards, corresponding card and apparatus

A communication method includes receiving a first message of a Short Message Service containing a first command that requests execution of a proactive command. The first message is decrypted according to protocol SCP80 to extract the first command. The execution of the proactive command is requested in order to obtain a response to the proactive command. A second message of the Short Message Service is transmitted to the remote server and indicates that the response to the proactive command has been obtained. A third message of the Short Message Service is received and contains a second command from the remote server. The third message is decrypted according to the protocol SCP80. A response message is generated as a function of the response and encrypted according to the protocol SCP80 to generate a fourth message of the Short Message Service transmitted to the remote server.

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Naples, Italy

Francesco Caserta