公开(公告)号：US20210099290A1

公开(公告)日：2021-04-01

申请号：US16588139

申请日：2019-09-30

申请人： PQ Solutions Limited

发明人： Martin TOMLINSON ,  Cen Jung TJHAI

IPC分类号： H04L9/08 ,  H04L9/14

摘要： Methods are described for constructing a secret key by multiple participants from multiple ciphertexts such that any quorum combination of participants can decrypt their respective ciphertexts and so generate a fixed number of key fragments that can be combined by a recipient to generate the secret key. Worked examples are described showing how the encryption keys for the ciphertexts may be key wrapped using a key encapsulation mechanism for which ciphers that are resistant to attack by a quantum computer may be used. In these cases, a post-quantum quorum system is realised. Methods are described by which the quorum key fragment ciphertexts may be updated so that the original key fragments become invalid without necessitating any change to the secret key.

公开(公告)号：US20200301793A1

公开(公告)日：2020-09-24

申请号：US16893937

申请日：2020-06-05

申请人： PQ SOLUTIONS LIMITED

发明人： Martin TOMLINSON ,  Cen Jung TJHAI ,  Andersen CHENG

IPC分类号： G06F11/14 ,  H04L9/08 ,  G06F21/40 ,  H04L9/14

摘要： The present disclosure includes systems and methods for quorum-based data processing, in which quorum portions are distributed to candidate participants in determined proportions that control groups of required participants. In exemplary embodiments, a server generates a plurality of quorum portions from original data, wherein the original data includes secret information for data processing within a secured computing environment, and wherein at least a predetermined minimum number of the quorum portions are required to reconstruct the original data. Sets of quorum portions are determined from said plurality of quorum portions, wherein each set includes a respective proportion of the plurality of quorum portions, and at least one set includes a larger proportion of the quorum portions. Each set of quorum portions is distributed to a respective one of a plurality of computing devices associated with respective participants over a data network within a secured computing environment.

公开(公告)号：US20220311623A1

公开(公告)日：2022-09-29

申请号：US17642195

申请日：2020-09-10

申请人： PQ Solutions Limited

发明人： Martin TOMLINSON ,  Andersen CHENG ,  Cen Jung TJHAI

IPC分类号： H04L9/32 ,  H04L9/08 ,  H04L9/00

摘要： Systems and methods are described for implementing communication of data between a group of users in a communication system. In one implementation, a plurality of quorum portions of a private group signing key are generated and provided to each of a plurality of devices of the group of users, wherein a group digital signature is reconstructed from a predetermined minimum number of encrypted portions of the group digital signature, each generated by a respective device of the group of users using a corresponding quorum portion of the private group signing key. Each user device may digitally sign group output data using a respective private group signing key portion. A reconstructed group digital signature may be verified using a corresponding public group signing key. Other embodiments are also described and claimed.

公开(公告)号：US20190114233A1

公开(公告)日：2019-04-18

申请号：US16211857

申请日：2018-12-06

申请人： PQ SOLUTIONS LIMITED

发明人： Martin TOMLINSON ,  Cen Jung TJHAI ,  Andersen CHENG

IPC分类号： G06F11/14 ,  H04L9/08 ,  H04L9/14 ,  G06F21/40

CPC分类号： G06F11/1469 ,  G06F21/40 ,  G06F2201/84 ,  H04L9/085 ,  H04L9/14 ,  H04L2209/24

摘要： The present disclosure includes systems and methods for quorum-based data recovery, in which data is recovered provided at least a minimum number of quorum data portions are presented. In exemplary embodiments, a predetermined minimum number of versions of original data is received, and the original data is reconstructed from the received versions, wherein the original data cannot be reconstructed without loss unless a predetermined minimum number of versions is received. In other embodiments, erroneous or corrupted quorum data portions are detected and associated participants presenting said erroneous or corrupted quorum data portions are identified.