The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 11, 2014

Filed:

May. 28, 2008
Applicants:

Arcady V. Schekochikhin, Cupertino, CA (US);

Srikanth Devarajan, San Jose, CA (US);

Narinder Paul, Sunnyvale, CA (US);

Kailash Kailash, San Jose, CA (US);

Inventors:

Arcady V. Schekochikhin, Cupertino, CA (US);

Srikanth Devarajan, San Jose, CA (US);

Narinder Paul, Sunnyvale, CA (US);

Kailash Kailash, San Jose, CA (US);

Assignee:

Zscaler, Inc., San Jose, CA (US);

Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01);
U.S. Cl.
CPC ...
H04L 63/1458 (2013.01); H04L 63/083 (2013.01); H04L 63/1408 (2013.01);
Abstract

Guard tables including absence information are used in a security system to protect a network service from a denial of service attack. A login key corresponding to a login request is hashed and the output of the hash is a bit position in a guard table. The bit value at the bit position in the guard table can be checked to determine if login information corresponding to the key is present. Further processing of the login request can be based on the indicated presence or absence of the information.


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