公开(公告)号：US10009170B2

公开(公告)日：2018-06-26

申请号：US14810705

申请日：2015-07-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jung Keun Lee ,  Bonwook Koo ,  Dongyoung Roh ,  Woo-Hwan Kim ,  Daesung Kwon

IPC: H04L9/06 ,  H04L9/08

CPC classification number: H04L9/0625 ,  H04L9/0861 ,  H04L2209/24

Abstract: An apparatus and method for providing a Feistel-based variable length block cipher, which are configured to, when plaintext having a certain bit length is encrypted, generate ciphertext having the same bit length as plaintext, and to decrypt ciphertext into plaintext having the same bit length. The apparatus includes an encryption/decryption key generation unit for generating a number of encryption/decryption keys corresponding to a preset number of rounds, based on a secret key, the length of the secret key, the length of plaintext, and a round constant; an encryption/decryption tweak generation unit for generating an encryption/decryption tweak based on a tweak, a length of tweak, and the length of plaintext; and a ciphertext output unit for outputting ciphertext having length identical to that of plaintext, based on plaintext, the length of the plaintext, the length of the secret key, the encryption/decryption keys, and the encryption/decryption tweak.

公开(公告)号：US09843442B2

公开(公告)日：2017-12-12

申请号：US14741511

申请日：2015-06-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Deukjo Hong ,  Jung Keun Lee ,  Woo-Hwan Kim ,  Daesung Kwon

IPC: H04L29/06 ,  H04L9/06

CPC classification number: H04L9/0643 ,  H04L2209/30 ,  H04L2209/38

Abstract: An operation apparatus includes a message expansion unit, a state data initiation unit, a state data generation unit, and a chain variable update unit. The message expansion unit generates a plurality of expanded messages using a message. The state data initiation unit generates the initial value of state data using chain variable data. The state data generation unit generates the final value of the state data by iterating a combination function and a step function using the state data and the plurality of expanded messages. The chain variable update unit updates the chain variable data using the state data of the final value.

公开(公告)号：US09479193B2

公开(公告)日：2016-10-25

申请号：US14305147

申请日：2014-06-16

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Dong-Chan Kim ,  Deukjo Hong ,  Jung Keun Lee ,  Daesung Kwon

IPC: G06F7/00 ,  H03M7/30

CPC classification number: H03M7/3059

Abstract: An apparatus and method for performing a compression operation in a hash algorithm are provided. The apparatus includes an interface unit, a message extension unit, a chain variable initial conversion unit, a compression function computation unit, and a chain variable final conversion unit. The interface unit receives a message and chain variable data. The message extension unit generates a plurality of extended messages from the message. The chain variable initial conversion unit converts the chain variable data into initial state data for a compression function. The compression function computation unit repeatedly computes extended message binding and step functions based on the initial state data and the plurality of extended messages, and performs combination with a final extended message, thereby computing final state data. The chain variable final conversion unit generates and outputs chain variable data, into which the chain variable data has been updated, using the final state data.

Abstract translation: 提供了一种用于在散列算法中执行压缩操作的装置和方法。 该装置包括接口单元，消息扩展单元，链式可变初始转换单元，压缩函数计算单元和链式可变最终转换单元。 接口单元接收消息和链变数据。 消息扩展单元从消息生成多个扩展消息。 链变量初始转换单元将链变量数据转换为用于压缩函数的初始状态数据。 压缩函数计算单元基于初始状态数据和多个扩展消息重复计算扩展消息绑定和步骤功能，并且与最终扩展消息进行组合，从而计算最终状态数据。 链变量最终转换单元使用最终状态数据生成并输出链变量数据已更新的链变量数据。

公开(公告)号：US09288041B2

公开(公告)日：2016-03-15

申请号：US14155756

申请日：2014-01-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Deukjo Hong ,  Dong-Chan Kim ,  Jung Keun Lee ,  Daesung Kwon

IPC: H04L9/06

CPC classification number: H04L9/0643 ,  H04L2209/38

Abstract: An apparatus and method for performing a compression operation in a fast message hash algorithm, which receive a 512-bit message and 512-bit chaining variable data, repeatedly calculate a 128-bit register-based step function, and then produce updated 512-bit chaining variable data. For this, the apparatus for performing a compression operation in a hash algorithm includes a message extension unit for receiving a message and generating a plurality of extended messages. A chaining variable initial conversion unit receives chaining variable data and converts the chaining variable data into initial state data. A step function operation unit repeatedly calculates a step function based on the initial state data and the plurality of extended messages and produces final state data. A chaining variable final conversion unit generates updated chaining variable data from the chaining variable data using the final state data, and outputs the updated chaining variable data.

Abstract translation: 一种用于在快速消息散列算法中执行压缩操作的装置和方法，其接收512位消息和512位链接可变数据，重复计算128位基于寄存器的步进功能，然后产生更新的512位 链接可变数据。 为此，用于在散列算法中执行压缩操作的装置包括用于接收消息并生成多个扩展消息的消息扩展单元。 链接变量初始转换单元接收链接变量数据并将链接变量数据转换为初始状态数据。 步进功能操作单元基于初始状态数据和多个扩展消息重复计算阶梯函数，并产生最终状态数据。 链接变量最终转换单元使用最终状态数据从链接变量数据生成更新的链接变量数据，并输出更新的链接变量数据。