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公开(公告)号：US11075748B2
公开(公告)日：2021-07-27
申请号：US16189108
申请日：2018-11-13
Applicant: ABB Schweiz AG
Inventor： Thomas Locher , Johannes Schneider , Matus Harvan , Sebastian Obermeier , Yvonne-Anne Pignolet
Abstract: The application relates to a method for computing a probabilistic encryption scheme for encrypting a data item in an electronic device including: computing a plurality of random bit strings in a computation cluster; sending the computed plurality of random strings to the electronic device; generating a random string (rE) for using in the encryption scheme in the electronic device using a subset of the plurality of the random strings computed in the computation cluster and encrypting the data item using the random string computed in the electronic device. The present application also relates to a corresponding system and corresponding computer program product including one or more computer readable media having computer executable instructions for performing the steps of the method.
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公开(公告)号：US10685141B2
公开(公告)日：2020-06-16
申请号：US16266151
申请日：2019-02-04
Applicant: ABB Schweiz AG
Inventor： Johannes Schneider , Matus Harvan , Sebastian Obermeier , Thomas Locher , Yvonne-Anne Pignolet
Abstract: The invention relates to a method for storing data blocks from client devices to a cloud storage system, the method includes the steps of: d) storing an encrypted first data block and a challenge of the first data block of a first client device on the cloud storage system, e) determining if a hash of a second data block of a second client device stored on the cloud storage system equals the hash of the first data block, f) if yes, transmitting the challenge of the first data block from the cloud storage system to the second client device, g) extracting, at the second client device, the bits at the positions or at the range contained in the challenge, hashing the extracted bits, encrypting the hashed bits with a public key of the first client device or of the second client device and uploading the encrypted bits from the second client device to the cloud storage system, and h) storing the encrypted bits from the second client device on the cloud storage system.
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公开(公告)号：US20190171847A1
公开(公告)日：2019-06-06
申请号：US16266151
申请日：2019-02-04
Applicant: ABB Schweiz AG
Inventor： Johannes Schneider , Matus Harvan , Sebastian Obermeier , Thomas Locher , Yvonne-Anne Pignolet
Abstract: The invention relates to a method for storing data blocks from client devices to a cloud storage system, the method includes the steps of: d) storing an encrypted first data block and a challenge of the first data block of a first client device on the cloud storage system, e) determining if a hash of a second data block of a second client device stored on the cloud storage system equals the hash of the first data block, f) if yes, transmitting the challenge of the first data block from the cloud storage system to the second client device, g) extracting, at the second client device, the bits at the positions or at the range contained in the challenge, hashing the extracted bits, encrypting the hashed bits with a public key of the first client device or of the second client device and uploading the encrypted bits from the second client device to the cloud storage system, and h) storing the encrypted bits from the second client device on the cloud storage system.
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公开(公告)号：US20190097787A1
公开(公告)日：2019-03-28
申请号：US16189126
申请日：2018-11-13
Applicant: ABB Schweiz AG
Inventor： Johannes Schneider , Matus Harvan , Sebastian Obermeier , Thomas Locher , Yvonne-Anne Pignolet
IPC: H04L9/00
CPC classification number: H04L9/008 , H04L2209/46 , H04L2209/76
Abstract: The invention relates to a method for aggregation of a performance indicator of a device comprising the steps of: concatenating a respective first data item to a plurality of second data items in the device; encrypting the plurality of concatenated second data items relevant for computing the performance indicator using a first encryption key in the device, wherein the first encryption key is based on an additive homomorphic encryption scheme; sending the encrypted concatenated second data items to a computation cluster; computing the performance indicator on the computation cluster using the encrypted concatenated second data items and computing an aggregate value regarding the performance indicator by summing up the encrypted concatenated second data items; sending the aggregate value to a server of a service provider of the device; decrypting the aggregate value using a second encryption key on the server of the service provider; and verifying the decrypted result by checking whether the decrypted sum computed by summing up the encrypted concatenated second data items comprises a predetermined value. The present invention also relates to a corresponding system and corresponding computer program product comprising one or more computer readable media having computer executable instructions for performing the steps of the method.
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