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.

Abstract: A method for detecting change points, CPs, in a signal of a process automation system, includes, in an offline learning phase, unsupervised, candidate CPs on at least one offline signal using unsupervised detection method are detected, CPs are selected from the candidate CPs; the selected CPs are provided to a supervised process; in the supervised process, an offline machine-learning (ML) system is trained to refine CPs from the selected CPs using a supervised machine learning method; a training data set for an online ML system is created using the offline ML system by projecting the refined CPs on the signal; the online ML system is trained in a supervised manner, using the created training data set; and after the offline learning phase, CPs are detected using the trained online ML system.

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.

Abstract: There is provided a method of determining an order of encrypted inputs, including a first encrypted input and a second encrypted input, using at least one processor, the first encrypted input including a first encrypted data and the second encrypted input including a second encrypted data, each of the first and second encrypted data being encrypted based on a homomorphic encryption scheme, the method including: generating a first series of encrypted blocks from the first encrypted data and a second series of encrypted blocks from the second encrypted data; performing a first block-wise operation between the first series of encrypted blocks and the second series of encrypted blocks to obtain a first series of block-wise outputs; performing a second block-wise operation between the first series of encrypted blocks and the second series of encrypted blocks to obtain a second series of block-wise outputs; and determining an order of the first and second encrypted data based on the first series of block-wise outpu

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.

Abstract: The present invention provides apparatus and methods for pro-active, intelligent fire suppression and/or control using a micro-controller that is communicatably connected to at least one fire-energy detection sensor and to at least one fire suppression device. The present invention provides apparatus and methods for sensing the exact direction of a fire as well as a regional location of a fire. The present invention provides apparatus and methods for directing a fire suppressant at the source of the flame. As depicted in FIG. 1a, the present invention provides fine protection apparatus (10) for identifying the existence of a fire hazard and for determining the exact direction and regional location of the file hazard by using multiple infrared (IR) detectors. A first IR detector (20) with a wide angle view of an area of coverage corresponding to an area requiring fire protection will be continuously queried by a micro-controller (100).

Abstract: The present invention provides apparatus and methods for pro-active, intelligent fire suppression and/or control using a micro-controller that is communicatably connected to at least one fire-energy detection sensor and to at least one fire suppression device. The present invention provides apparatus and methods for sensing the exact direction of a fire as well as a regional location of a fire. The present invention provides apparatus and methods for directing a fire suppressant at the source of the flame. As depicted in FIG. 1a, the present invention provides fine protection apparatus (10) for identifying the existence of a fire hazard and for determining the exact direction and regional location of the file hazard by using multiple infrared (IR) detectors. A first IR detector (20) with a wide angle view of an area of coverage corresponding to an area requiring fire protection will be continuously queried by a micro-controller (100).