公开(公告)号：US10158684B2

公开(公告)日：2018-12-18

申请号：US15275844

申请日：2016-09-26

Applicant: Cisco Technology, Inc.

Inventor： John Arsenault ,  Michael A. Ramalho ,  Mihailo Zilovic ,  Jonathan Rosenberg

IPC: G06F15/16 ,  H04L29/06 ,  H04L29/08 ,  H04W12/08 ,  G06F21/30 ,  H04L9/32 ,  H04W88/02 ,  H04W88/08

Abstract: An access server communicates with a video conference device and a user device. The access server and the user device may access known mappings, including a default mapping. Each mapping is configured to map between tokens and symbols according to a distinct mapping relationship between the multi-bit tokens and the symbols. The access server instructs the video conference device to map an initial token to an initial symbol based on the default mapping and to transmit the initial symbol. The access server receives from the user device the initial token and a challenge mapping selected by the user device. The access server determines a challenge token that the challenge mapping maps to a challenge symbol, and instructs the video conference device to transmit the challenge symbol. The access server grants the user device access to an information carrying channel only if the challenge token is received from the user device.

公开(公告)号：US20180091565A1

公开(公告)日：2018-03-29

申请号：US15275844

申请日：2016-09-26

Applicant: Cisco Technology, Inc.

Inventor： John Arsenault ,  Michael A. Ramalho ,  Mihailo Zilovic ,  Jonathan Rosenberg

IPC: H04L29/06 ,  H04W12/08 ,  H04L29/08

CPC classification number: H04L65/403 ,  G06F21/30 ,  G06F2221/2103 ,  H04L9/3271 ,  H04L63/08 ,  H04L63/10 ,  H04L67/02 ,  H04L67/104 ,  H04W12/08 ,  H04W88/02 ,  H04W88/08

Abstract: An access server communicates with a video conference device and a user device. The access server and the user device may access known mappings, including a default mapping. Each mapping is configured to map between tokens and symbols according to a distinct mapping relationship between the multi-bit tokens and the symbols. The access server instructs the video conference device to map an initial token to an initial symbol based on the default mapping and to transmit the initial symbol. The access server receives from the user device the initial token and a challenge mapping selected by the user device. The access server determines a challenge token that the challenge mapping maps to a challenge symbol, and instructs the video conference device to transmit the challenge symbol. The access server grants the user device access to an information carrying channel only if the challenge token is received from the user device.