-
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
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：US11212082B2
公开(公告)日：2021-12-28
申请号：US16588139
申请日：2019-09-30
申请人： PQ Solutions Limited
发明人： Martin Tomlinson , Cen Jung Tjhai
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：US10904008B2
公开(公告)日：2021-01-26
申请号：US16658227
申请日：2019-10-21
申请人： PQ Solutions Limited
发明人： Martin Tomlinson , Cen Jung Tjhai , Andersen Cheng
摘要： Systems and methods for user identity and transaction authentication are described. A user may be authenticated by a terminal configured to process image data of a two-dimensional code to decode key information, the two-dimensional code comprising a cryptographic binding of user credentials including a low-resolution image of the user's face and optionally user biometric data to database user information stored on a secure server. A hash of the two-dimensional code has several digits in common with the hash of the user information stored on the secure server. Authentication may be carried out by computing and comparing the hash values, comparing the high-resolution image of the user's face fetched from the secure server to the user and to the low resolution image embedded in the two dimensional code. The two-dimensional code may be generated to provide access to a restricted area.
-
公开(公告)号：US09973461B2
公开(公告)日：2018-05-15
申请号：US14306515
申请日：2014-06-17
申请人： PQ Solutions Limited
发明人： Martin Tomlinson , Andersen Cheng , Cen Jung Tjhai
IPC分类号： H04L12/58
摘要： Systems and methods are provided for direct packet communications and store and forward packet communications including packets which have attributes which determine the lifetime of the packet contents and these lifetimes are optionally a function of the recipient. Example methods are given featuring the transmission of packets with limited lifetime, the storing and retransmission of packets to one or more recipients and confirmation of deletion of packet contents. It is also shown that cryptography may be employed to ensure that timed presentation of packet contents to recipients takes place and is authenticated by the sender.
-
公开(公告)号：US12003650B2
公开(公告)日：2024-06-04
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
CPC分类号： H04L9/3255 , H04L9/008 , H04L9/085
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：US11853171B2
公开(公告)日：2023-12-26
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
CPC分类号： G06F11/1469 , G06F21/40 , H04L9/085 , H04L9/14 , G06F2201/84 , H04L2209/24
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：US10728038B2
公开(公告)日：2020-07-28
申请号：US15467815
申请日：2017-03-23
申请人： PQ Solutions Limited
发明人： Martin Tomlinson , Cen Jung Tjhai
摘要： Methods are described for constructing a secret key by multiple participants such that any quorum combination of participants can generate a fixed number of key components that can be combined by a recipient to generate the secret key. The methods permit an identical secret key to be generated by a different sized quorum from different participants if required. The keys may be used as private keys for encryption, decryption, digital signatures or authentication tokens and each key is generated from a key index. The circuits used by a quorum of participants for the generation of keys feature nested non-linear devices connected in series with outputs multiplied by stored secret values. Example applications are described including blinded cipher text generation, a multi-signature cryptocurrency system and an encrypted cloud storage system.
-
公开(公告)号：US10678658B2
公开(公告)日：2020-06-09
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
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.
-
公开(公告)号：US10467099B2
公开(公告)日：2019-11-05
申请号：US15782193
申请日：2017-10-12
申请人： PQ Solutions Limited
发明人： Martin Tomlinson , Cen Jung Tjhai , Andersen Cheng
IPC分类号： G06F11/00 , G06F11/14 , G06F11/10 , H03M13/15 , G06F3/06 , H04L9/06 , H04L9/32 , H03M13/13 , H03M13/43
摘要： Digital data archival methods and systems are described, providing controlled and verifiable information destruction. In one embodiment, the method comprises storing digitally encoded information, wherein the information is encoded as a sequence of numbers or symbols using parameters defining an associated error correction ability of an error correcting algorithm based on a lifetime of the digitally encoded information. Errors are periodically added to the sequence of numbers or symbols, such that the digitally encoded information is recoverable from the sequence of numbers or symbols during the defined lifetime, and after a total of number of added errors exceeds the associated error correction ability, the digitally encoded information cannot be retrieved.
-
公开(公告)号：US10176056B2
公开(公告)日：2019-01-08
申请号：US14683379
申请日：2015-04-10
申请人： Martin Tomlinson , Cen Jung Tjhai , Andersen Cheng
发明人： Martin Tomlinson , Cen Jung Tjhai , Andersen Cheng
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.
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.021 秒)
