公开(公告)号：US20190103957A1

公开(公告)日：2019-04-04

申请号：US16086505

申请日：2017-05-11

Applicant: SONY CORPORATION

Inventor： Takanori ISOBE ,  Harunaga HIWATARI ,  Kyoji SHIBUTANI

IPC: H04L9/06 ,  H04L9/30 ,  G09C1/00

Abstract: There is provided an encryption device to suppress calculation in the reverse direction in whitebox model encryption. The encryption device includes: having a predetermined relationship that outputs a plurality of output values according to a plurality of input values configured of plain text, with a part of the plurality of output values being inputted to a trapdoor one-way function, the predetermined relationship being defined by the output values that are not inputted to the trapdoor one-way function and one arbitrary input value of the plurality of input values; and having a property of encrypting a part of the plurality of output values according to the trapdoor one-way function, and the trapdoor one-way function not being able to decrypt encrypted data in a state in which a trapdoor is unknown.

公开(公告)号：US20170118011A1

公开(公告)日：2017-04-27

申请号：US15127072

申请日：2015-02-23

Applicant: SONY CORPORATION

Inventor： Kyoji SHIBUTANI ,  Takanori ISOBE

IPC: H04L9/06 ,  G09C1/00 ,  H04L9/14 ,  H04L9/08

CPC classification number: H04L9/0625 ,  G06F17/16 ,  H04L9/0631 ,  H04L9/14 ,  H04L2209/12 ,  H04L2209/24

Abstract: An encryption processing system includes an encryption processing circuit that executes a round calculation on input data and generates output data, and a key schedule circuit that outputs key data used in the encryption processing circuit to the encryption processing circuit. Each round calculation executed by the encryption processing circuit includes a linear conversion process executed by a linear conversion circuit, and the linear conversion circuit changes a linear conversion mode of the linear conversion process according to a round transition.

公开(公告)号：US20140192973A1

公开(公告)日：2014-07-10

申请号：US14049854

申请日：2013-10-09

Applicant: SONY CORPORATION

Inventor： Taizo SHIRAI ,  Kyoji SHIBUTANI ,  Toru AKISHITA ,  Shiho MORIAI

IPC: H04L9/30

CPC classification number: H04L9/0625 ,  G09C1/00 ,  H04L9/002 ,  H04L9/0631 ,  H04L2209/122 ,  H04L2209/125

Abstract: A common-key blockcipher processing configuration with enhanced immunity against attacks such as saturation attacks and algebraic attacks (XSL attacks) is realized. In an encryption processing apparatus that performs common-key blockcipher processing, S-boxes serving as non-linear transformation processing parts set in round-function executing parts are configured using at least two different types of S-boxes. With this configuration, the immunity against saturation attacks can be enhanced. Also, types of S-boxes present a mixture of different types. With this configuration, the immunity against algebraic attacks (XSL attacks) can be enhanced, thereby realizing a highly secure encryption processing apparatus.

Abstract translation: 实现了具有针对诸如饱和攻击和代数攻击（XSL攻击）等攻击的增强免疫性的通用密钥块密码处理配置。 在执行共同密钥块密码处理的加密处理装置中，使用至少两种不同类型的S盒来配置用作在循环功能执行部分中设置的非线性变换处理部分的S盒。 通过这种配置，可以提高对饱和攻击的抗扰度。 而且，S盒的类型是不同类型的混合物。 利用这种配置，可以增强对代数攻击（XSL攻击）的抗扰度，从而实现高度安全的加密处理装置。