History access for end-to-end (E2E) secure content
Grant
US12598061B2
Kind: B2
Apr 07, 2026
Assignee
CISCO TECHNOLOGY, INC.
Inventors
Richard Lee Barnes, Brian Christopher Powell
Abstract
An embodiment provides new joiners to a conversation with access to historical keys using an encrypted skip list that can be safely stored on untrusted servers. This list provides random access to conversation content with logarithmic complexity (queries and data size), and imposes small (log-scale) overhead on linear/full access to the conversation content.
CPC Classifications
H04L 9/08
H04L 9/0833
H04L 9/0836
H04L 9/0891
H04L 9/088
H04L 9/0861
H04L 9/0822
H04L 9/0894
H04L 9/14
H04L 63/06
H04L 63/064
H04L 63/065
H04L 63/068
Filing Date
2024-01-22
Application No.
18418900
Claims
20