William W H Cheng

US Patent:

7181623, Feb 20, 2007

Filed:

Mar 28, 2001

Appl. No.:

09/818940

Inventors:

Leana Golubchik - North Bethesda MD, US
William C. Cheng - North Bethesda MD, US
Samir Khuller - Burtonsville MD, US
Samrat Bhattacharjee - Burtonsville MD, US
Cheng-Fu Chou - Silver Spring MD, US

Assignee:

University of Maryland - College Park MD

International Classification:

H04L 9/00
H04L 9/32
G06F 7/04
G06F 15/16

US Classification:

713178, 713153, 726 26

Abstract:

A server/overlay network architecture and related method prevent (i. e. , minimize the likelihood of) overloads from many network clients all trying to upload data files to a common destination server on the network at about the same time. Before a client transfers its (his or her) data file to the common network destination, a unique identifier (generally much smaller than the data itself) for the data of that client is generated. The unique identifier, such as a one-way hash function, is transmitted to an authenticator trusted by the common destination. The authenticator time-stamps (i. e. , stores time and date) the unique identifier, digitally signs a message incorporating the unique identifier and the time-stamp and sends the message to the client who sent the unique identifier. The client then sends the data file with its time stamp to one of a plurality of upload proxy servers. The proxy server sends a message to the common destination telling it to pick up the data file when ready.

US Patent:

20070061586, Mar 15, 2007

Filed:

Nov 3, 2006

Appl. No.:

11/592256

Inventors:

Leana Golubchik - North Bethesda MD, US
William Cheng - North Bethesda MD, US
Samir Khuller - Silver Spring MD, US
Samrat Bhattacharjee - Burtonsville MD, US
Cheng-Fu Chou - Silver Spring MD, US

International Classification:

H04L 9/00

US Classification:

713178000

Abstract:

A server/overlay network architecture and related method prevent (i.e., minimize the likelihood of) overloads from many network clients all trying to upload data files to a common destination server on the network at about the same time. Before a client transfers its (his or her) data file to the common network destination, a unique identifier (generally much smaller than the data itself) for the data of that client is generated. The unique identifier, such as a one-way hash function, is transmitted to an authenticator trusted by the common destination. The authenticator time-stamps (i.e., stores time and date) the unique identifier, digitally signs a message incorporating the unique identifier and the time-stamp and sends the message to the client who sent the unique identifier. The client then sends the data file with its time stamp to one of a plurality of upload proxy servers. The proxy server sends a message to the common destination telling it to pick up the data file when ready. The common destination server thus avoids being overloaded by many clients transferring their rather large data files to it at the same time. The common destination server can check the time-stamp and unique identifier to insure that the data has not been altered after the time-stamp.