公开(公告)号：US20210073797A1

公开(公告)日：2021-03-11

申请号：US16567626

申请日：2019-09-11

Applicant: NXP B.V.

Inventor： Marcel MEDWED ,  Mario LAMBERGER

IPC: G06Q20/36 ,  G06Q20/06 ,  G06Q20/38

Abstract: A method for managing an anonymous e-cash transaction includes receiving a request to withdraw a payment coin, generating a combination of random attributes for the payment coin, creating the payment coin based on the combination of attributes, and issuing the payment coin in exchange for a first asset. Each attribute of the combination of attributes may represent a different portion of a total value of the payment coin. A partially spent value of the payment coin may be based on a revealed subset of the combination of attributes. The method further includes creating a refund coin based on the combination of attributes and spending the refund coin to issue a refund having a value corresponding to an unspent portion of the payment coin. Each attribute of the combination of attributes of the refund coin may represent a different portion of a total value of the refund coin.

公开(公告)号：US20230246815A1

公开(公告)日：2023-08-03

申请号：US17587868

申请日：2022-01-28

Applicant: NXP B.V.

Inventor： Mario LAMBERGER ,  Christine VAN VREDENDAAL ,  Markus HINKELMANN ,  Hauke MEYN ,  Alexander VOGT

IPC: H04L9/08

CPC classification number: H04L9/0825 ,  H04L9/0891

Abstract: Various embodiments relate to a system for provisioning a cryptographic device, including: a memory; a processor coupled to the memory, wherein the processor is further configured to: determine a maximum PQC private key size, maximum PQC public key size, and maximum PQC updater size of a plurality of post quantum cryptography algorithms; provision memory in the cryptographic device to store a PQC-update non-PQC private key, a secret PQC-update non-PQC public key, PQC private key, PQC public key, and PQC updater based upon the determined maximum PQC private key size, maximum PQC public key size, and maximum updater size; and provision the cryptographic device with the PQC-update non-PQC private key, the secret PQC-update non-PQC public key, a non-PQC secret key, a non-PQC public key, and non-PQC algorithm code configured to carry out non-PQC cryptographic algorithms.

公开(公告)号：US20230246826A1

公开(公告)日：2023-08-03

申请号：US17587903

申请日：2022-01-28

Applicant: NXP B.V.

Inventor： Christine VAN VREDENDAAL ,  Mario LAMBERGER ,  Markus HINKELMANN ,  Hauke MEYN ,  Alexander VOGT

IPC: H04L9/08 ,  H04L9/14

CPC classification number: H04L9/0852 ,  H04L9/14

Abstract: Various embodiments relate to a system for provisioning a cryptographic device, including: a memory; a processor coupled to the memory, wherein the processor is further configured to: determine the maximum key generation seed size, maximum PQC private key size, maximum PQC public key size, and maximum PQC updater size of a plurality of post quantum cryptography algorithms; provision memory in the cryptographic device to store a key generation seed, PQC private key, PQC public key, and PQC updater based upon the determined maximum key generation seed size, maximum PQC private key size, maximum PQC public key size, and maximum PQC updater size; and provision the cryptographic device with a non-PQC secret key, a non-PQC public key, and non-PQC algorithm code configured to carry out non-PQC cryptographic algorithms.