公开(公告)号：US20230327854A1

公开(公告)日：2023-10-12

申请号：US17718631

申请日：2022-04-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ali Zibaeenejad ,  Mohamed Tolba

IPC: H04L9/06 ,  H04L9/08 ,  H04L9/30

CPC classification number: H04L9/0643 ,  H04L9/0631 ,  H04L9/0637 ,  H04L9/0825 ,  H04L9/3026

Abstract: An encoder for encrypting a plaintext into a ciphertext. The encoder has an encoding submodule for acting as a deterministic random bit generator (DRBG) in an offline mode for generating one or more hash-key value candidates, and for acting as a stream encryptor in an online mode for encrypting the plaintext into the ciphertext; a hash key selector for selecting a hash-key value H from the one or more hash-key value candidates; and a hash submodule for generating a MAC tag using at least the ciphertext and the selected hash-key value H. A corresponding decoder is also provided.

公开(公告)号：US12149610B2

公开(公告)日：2024-11-19

申请号：US17718631

申请日：2022-04-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ali Zibaeenejad ,  Mohamed Tolba

IPC: H04L29/06 ,  H04L9/06 ,  H04L9/08 ,  H04L9/30

Abstract: An encoder for encrypting a plaintext into a ciphertext. The encoder has an encoding submodule for acting as a deterministic random bit generator (DRBG) in an offline mode for generating one or more hash-key value candidates, and for acting as a stream encryptor in an online mode for encrypting the plaintext into the ciphertext; a hash key selector for selecting a hash-key value H from the one or more hash-key value candidates; and a hash submodule for generating a MAC tag using at least the ciphertext and the selected hash-key value H. A corresponding decoder is also provided.

公开(公告)号：US12160505B2

公开(公告)日：2024-12-03

申请号：US17558299

申请日：2021-12-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Mohamed Tolba ,  Ahmed Abdelkhalek ,  Teng Wu

IPC: H04L9/08 ,  H04L12/18

Abstract: A method of organizing an end-to-end encrypted online meeting for a group of members including a creator. The method includes: maintaining, by each member in the online meeting including the creator, a group tree from which is derivable a group key required for communication between members in the online meeting; accessing, by the creator, a key package associated with a member of the group; adding to the online meeting, by the creator and based on the key package, the member associated with the key package; updating, by the creator, the group tree maintained by the creator; generating, by the creator and based on the updated group tree, one or more encrypted secret keys required for deriving the group key; and transmitting, by the creator and via a server, the updated group tree and the one or more encrypted secret keys to each other member in the online meeting.

公开(公告)号：US11888824B2

公开(公告)日：2024-01-30

申请号：US17566841

申请日：2021-12-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Mohamed Tolba ,  Ahmed Abdelkhalek ,  Teng Wu

IPC: H04L9/40

CPC classification number: H04L63/04

Abstract: An end-to-end group messaging method or apparatus organizes a plurality of local groups of members into local-group (LG) trees and a public-group (PG) tree. Each tree has a plurality of nodes including a root node connecting to a plurality of leaf nodes. Each LG tree corresponds to a local group. Each member of a local group is associated with a leaf node of the corresponding LG tree. Each LG tree is associated with a leaf node of the PG tree. Members of a same local group may establish communication therebetween by using a group key associated with the root node of the LG tree of the local group. Members of all local groups may establish communication therebetween by using a group key associated with the root node of the PG tree.