公开(公告)号：US20240265373A1

公开(公告)日：2024-08-08

申请号：US18160110

申请日：2023-01-26

Applicant: VMware, Inc.

Inventor： Alin Tomescu ,  Adithya Bhat ,  Ittai Abraham ,  Guy Gueta ,  Binyamin Pinkas ,  Avishay Yanai

IPC: G06Q20/36 ,  G06Q20/38 ,  G06Q20/40

CPC classification number: G06Q20/3678 ,  G06Q20/389 ,  G06Q20/4014

Abstract: Disclosed are examples of accountable decentralized anonymous payment systems and methods. One such method comprises storing, in a digital wallet, a digital coin that has been signed by a bank computing device; rerandomizing the digital coin and a coin signature to produce a new version of the digital coin that is anonymous with respect to an owner of the digital coin; sending the new version of the digital coin to a recipient computing device; computing a nullifier for the new version of the digital coin using a pseuodorandom function over a serial number of the digital coin; sending the nullifier for the new version of the digital coin to the bank computing device; and providing the bank computing device a zero knowledge proof that a value of the nullifier for the new version of the digital coin is correct and is the same as a nullifier of the digital coin.

公开(公告)号：US11734230B2

公开(公告)日：2023-08-22

申请号：US17562684

申请日：2021-12-27

Applicant: VMware, Inc.

Inventor： Igor Golikov ,  Alex Markuze ,  Avishay Yanai ,  Guy Gueta ,  Israel Cidon ,  Eyal Zohar

IPC: G06F16/17 ,  G06F16/174

CPC classification number: G06F16/1752

Abstract: In some embodiments, a method receives data for a block in a blockchain during a recovery process in which a recovering replica is recovering the block for a first instance of the blockchain being maintained by the recovering replica. The block is received from a second instance of the blockchain being maintained by a source replica. The method splits the data for the block into a plurality of chunks. Each chunk includes a portion of the data for the block; It is determined whether the recovering replica can recover a chunk in the plurality of chunks using a representation of the chunk. In response to determining that the recovering replica can recover the chunk, sending the representation of the chunk to the recovering replica. In response to determining that the recovering replica cannot recover the chunk, sending the data for the chunk to the recovering replica.

公开(公告)号：US20230195750A1

公开(公告)日：2023-06-22

申请号：US17555053

申请日：2021-12-17

Applicant: VMware, Inc.

Inventor： Ittai Abraham ,  Guy Gueta ,  Igor Golikov ,  Toly Kournik ,  Tsvetomir Dimitrov

IPC: G06F16/27 ,  G06F11/14

CPC classification number: G06F16/273 ,  G06F11/1451 ,  G06F2201/80

Abstract: In some embodiments, a method sends first messages that request first information for a set of blocks of the blockchain to the N replicas. Each replica maintains a respective instance of the blockchain. Second messages is received from at least a portion of the N replicas. The second messages include the first information for the set of blocks from each respective instance of the blockchain that is maintained by the N replicas. The method analyzes the first information to determine whether a consensus on the first information is reached by a number of replicas. When consensus is reached, a request is sent to a replica for one or more blocks to back up to a backup blockchain and second information is received for the one or more blocks from the replica. The method uses the second information to back up the one or more blocks in the backup blockchain.

公开(公告)号：US11960502B2

公开(公告)日：2024-04-16

申请号：US17555053

申请日：2021-12-17

Applicant: VMware, Inc.

Inventor： Ittai Abraham ,  Guy Gueta ,  Igor Golikov ,  Toly Kournik ,  Tsvetomir Dimitrov

IPC: G06F16/20 ,  G06F11/14 ,  G06F16/27

CPC classification number: G06F16/273 ,  G06F11/1451 ,  G06F2201/80

Abstract: In some embodiments, a method sends first messages that request first information for a set of blocks of the blockchain to the N replicas. Each replica maintains a respective instance of the blockchain. Second messages is received from at least a portion of the N replicas. The second messages include the first information for the set of blocks from each respective instance of the blockchain that is maintained by the N replicas. The method analyzes the first information to determine whether a consensus on the first information is reached by a number of replicas. When consensus is reached, a request is sent to a replica for one or more blocks to back up to a backup blockchain and second information is received for the one or more blocks from the replica. The method uses the second information to back up the one or more blocks in the backup blockchain.

公开(公告)号：US20230205738A1

公开(公告)日：2023-06-29

申请号：US17562684

申请日：2021-12-27

Applicant: VMware, Inc.

Inventor： Igor Golikov ,  Alex Markuze ,  Avishay Yanai ,  Guy Gueta ,  Israel Cidon ,  Eyal Zohar

IPC: G06F16/174

CPC classification number: G06F16/1752

Abstract: In some embodiments, a method receives data for a block in a blockchain during a recovery process in which a recovering replica is recovering the block for a first instance of the blockchain being maintained by the recovering replica. The block is received from a second instance of the blockchain being maintained by a source replica. The method splits the data for the block into a plurality of chunks. Each chunk includes a portion of the data for the block; It is determined whether the recovering replica can recover a chunk in the plurality of chunks using a representation of the chunk. In response to determining that the recovering replica can recover the chunk, sending the representation of the chunk to the recovering replica. In response to determining that the recovering replica cannot recover the chunk, sending the data for the chunk to the recovering replica.