公开(公告)号：US20240062053A1

公开(公告)日：2024-02-22

申请号：US18260585

申请日：2021-01-08

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Hong Meng Benjamin TAN ,  Souhail MEFTAH ,  Khin Mi Mi AUNG

IPC: G06N3/063

CPC classification number: G06N3/063

Abstract: In some aspects, a set of input elements is obtained, at a rectified linear unit-activated neuron of a neural network based, on input data at the neuron. A first group and a second group of input elements are generated based on the set of input elements. The first group and the second group of input elements are associated with first weight elements and second weight elements, respectively. A first value is generated based on the first group of input elements and the first weight elements. A second value is generated based on the second group of input elements and the second weight elements. A third value and a fourth value are respectively generated based on a first operation and a second operation on the first value and the second value. An output of the neuron is generated based on the third value and the fourth value.

公开(公告)号：US20240039694A1

公开(公告)日：2024-02-01

申请号：US18254132

申请日：2021-11-24

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Hong YANG ,  Dee Meng KANG ,  Ahmad Qaisar Ahmad AL BADAWI ,  Khin Mi Mi AUNG

IPC: H04L9/00 ,  G06F9/38 ,  G06F7/72

CPC classification number: H04L9/008 ,  G06F9/3875 ,  G06F7/724

Abstract: There is provided a device for processing homomorphically encrypted data. The device includes: inter-line butterfly array blocks, each inter-line butterfly array block including inter-line modulus butterfly units, each inter-line modulus butterfly unit being configured to perform a modulus butterfly operation based on a computation pair of data points received corresponding to a pair of input data points at a same row of a matrix of input data points; intra-line butterfly array blocks, each intra-line butterfly array block including intra-line modulus butterfly units, each intra-line modulus butterfly unit being configured to perform a modulus butterfly operation based on a computation pair of data points received corresponding to a pair of input data points at a same column of the matrix of input data points; and a clock counter communicatively coupled to each inter-line butterfly array block and each intra-line butterfly array block, and configured to output a counter signal for controlling each inter-line butterfly array block and each intra-line butterfly array block to operate with single cycle initiation interval. The matrix of input data points includes columns of input data points, whereby parallel input data points derived from the homomorphically encrypted data are arranged into the columns of input data points. Furthermore, the inter-line butterfly array blocks and the intra-line butterfly array blocks are arranged in series to form a pipeline for processing the matrix of input data points.

公开(公告)号：US20210111880A1

公开(公告)日：2021-04-15

申请号：US15999422

申请日：2017-02-15

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Shuqin REN ,  Hong Meng Benjamin TAN ,  Khin Mi Mi AUNG

IPC: H04L9/08 ,  H04L9/06 ,  H04L9/30

Abstract: An access control method, which may be applied in a cloud environment, is provided in various embodiments. The access control method includes: receiving from a user a request for access to a resource; determining a group access key related to the resource; determining a user key of the user; determining whether the group key is an integer multiple of the user key; and granting the user access to the resource if it is determined that the group access key is an integer multiple of the user key.

公开(公告)号：US20220085970A1

公开(公告)日：2022-03-17

申请号：US16634570

申请日：2018-07-24

Applicant: Agency for Science, Technology and Research

Inventor： Ahmad AL BADAWI ,  Khin Mi Mi AUNG

IPC: H04L9/00 ,  H04L9/30 ,  G06F7/72

Abstract: Efficient polynomial multiplication for Accelerated Fully Homomorphic Encryption (FHE). An efficient method for large integer and polynomial multiplication in a ring using negacyclic convolution and discrete Galois transform with arbitrary primes is described. The method is adapted to work with arbitrary primes that support Gaussian arithmetic. Dealing with non-Gaussian primes gives rise to another problem of how to find primitive roots of unity and of (i). An efficient solution to find those roots of interest is provided.

公开(公告)号：US20170048058A1

公开(公告)日：2017-02-16

申请号：US15306072

申请日：2015-04-23

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Shuqin REN ,  Benjamin Hong Meng TAN ,  Khin Mi Mi AUNG ,  Sivaraman SUNDARAM

IPC: H04L9/00 ,  H04L9/06

Abstract: There is provided a method of generating a ciphertext. The method includes encrypting an input data to produce an encrypted data, and randomizing the encrypted data to produce the ciphertext. In particular, the randomizing process includes performing an exclusive-or (xor) operation on the encrypted data with a cipher pad, whereby the cipher pad is generated based on an xor-homomorphic function of a first key using a second key generated based on the encrypted data. There is also provided a corresponding system for generating a ciphertext, a corresponding method and system for decrypting a ciphertext, and a corresponding method and system for searching ciphertexts in a database, such as at an untrusted server.

Abstract translation: 提供了生成密文的方法。 该方法包括加密输入数据以产生加密数据，并且随机化加密数据以产生密文。 特别地，随机化处理包括使用密码垫对加密数据执行异或（xor）操作，由此基于第一密钥的XOR同态函数使用基于 加密数据。 还提供了用于生成密文的相应系统，用于解密密文的相应方法和系统，以及用于搜索诸如不受信任的服务器的数据库中的密文的相应方法和系统。

公开(公告)号：US20240171374A1

公开(公告)日：2024-05-23

申请号：US18550100

申请日：2021-03-12

Applicant: Agency for Science, Technology and Research

Inventor： Hong Meng Benjamin TAN ,  Sze Ling YEO ,  Khin Mi Mi AUNG

IPC: H04L9/00 ,  H04L9/06

CPC classification number: H04L9/008 ,  H04L9/06

Abstract: In some aspects, a method for generating encoded plaintext data in a plaintext vector space includes obtaining a plurality of vectors of plaintext elements, where each plaintext element is an element of a first finite field. The method further includes encoding the plurality of vectors of plaintext elements to a vector of field elements, where each vector of plaintext elements is encoded to a respective field element of the vector of field elements, each of the field elements is an element of a second finite field, and the second finite field is a finite extension field of the first finite field. The method additionally includes encoding the vector of field elements into an element of the plaintext vector space to produce the encoded plaintext data for homomorphic encryption and computation.

公开(公告)号：US20240061955A1

公开(公告)日：2024-02-22

申请号：US18260776

申请日：2021-01-08

Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

Inventor： Chao JIN ,  Fook Mun CHAN ,  Khin Mi Mi AUNG

IPC: G06F21/62 ,  H04L9/00

CPC classification number: G06F21/6245 ,  H04L9/008

Abstract: There is provided a method of privacy-preserving logistic regression training based on homomorphically encrypted ciphertexts. The method includes: obtaining a first packed ciphertext comprising at least a portion of a first training data sample packed into a first vector of slots thereof for training a privacy-preserving logistic regression model; obtaining a second packed ciphertext comprising a plurality of weights of the privacy-preserving logistic regression model packed into a first vector of slots thereof; determining at least a first output probability of the privacy-preserving logistic regression model based on the first packed ciphertext and the second packed ciphertext; and updating the plurality of weights based on the first output probability. There is also provided a corresponding system for privacy-preserving logistic regression training based on homomorphically encrypted data.