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.
Patent No.:
Date of Patent:
Aug. 10, 2010
Filed:
Jun. 28, 2007
Applicants:
Michael Zunke, Kirchheim, DE;
Yanki Margalit, Ramat-Gan, IL;
Dani Margalit, Ramat-Gan, IL;
Inventors:
Assignee:
Aladdin Knowledge Systems Ltd., Petach Tikva, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04K 1/04 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An efficient symmetrical-cryptographic method for using a fast but insecure host to perform encryption/decryption based on a secret key in a secure, but slow hardware token, such as a smartcard or similar device, without revealing the secret key to the host, and such that the ciphertext and plaintext are exactly the same size. The present method is suitable for use in Digital Rights Management and Software Rights Management applications which require precise interchangeability of ciphertext and plaintext in pre-allocated areas of data storage.