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:
Oct. 10, 2017
Filed:
Apr. 24, 2014
Applicant:
Nec Europe Ltd., Heidelberg, DE;
Inventors:
Assignee:
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0618 (2013.01); H04L 9/0637 (2013.01);
Abstract
A method for encrypting data based on all-or-nothing encryption. Data to be encrypted and an encryption key are provided. The data is divided into an odd number of blocks, wherein each of the odd number of blocks has the same size. The blocks are encrypted with the encryption key to obtain an intermediate ciphertext that includes the encrypted blocks. The intermediate ciphertext is linearly transformed based on additive contravalence operations to obtain a final ciphertext.