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:
Nov. 25, 2014
Filed:
Jul. 22, 2011
Eiichiro Fujisaki, Tokyo, JP;
Eiichiro Fujisaki, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
In encryption, a random number r is generated to generate a ciphertext C=M(+)R(r), function values H(r, C), a common key K, a ciphertext C(Ψ+1) of the random number r using the common key K, and ciphertexts C(0) and C(λ) of the common key K that correspond to function values H(r, C). In decryption, a common key K' is decrypted from input ciphertexts C′(0) and C′(λ), an input ciphertext C′(Ψ+1) is decrypted by using the common key K′ to generate a decrypted value r′, and function values H(r′, C′) is generated. If the input ciphertexts C′(0) and C′(λ) do not match ciphertexts C″(0) and C″(λ) of the common key K′ that correspond to the function values H(r′, C′), decryption is rejected; if they match, the input ciphertext C′ is decrypted.