公开(公告)号：US09042545B2

公开(公告)日：2015-05-26

申请号：US14085076

申请日：2013-11-20

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Bonwook Koo ,  Dongyoung Roh ,  Daesung Kwon

IPC: H04L9/00 ,  H04L9/08

CPC classification number: H04L9/0869 ,  H04L9/0838

Abstract: An apparatus and method for converting a random binary sequence into a random integer is provided. The present invention converts a random binary sequence into a random integer, and determines whether the corresponding random integer falls within a preset integer interval. Further, if it is determined that the random integer generated from the random binary sequence does not fall within the preset integer interval, the present invention repeatedly updates a random binary sequence until a random integer falling within the corresponding integer interval is obtained, thus outputting uniformly distributed random integers which fall within the preset integer interval.

Abstract translation: 提供了一种用于将随机二进制序列转换为随机整数的装置和方法。 本发明将随机二进制序列转换为随机整数，并且确定对应的随机整数是否落在预设的整数间隔内。 此外，如果确定从随机二进制序列生成的随机整数不落在预设的整数间隔内，则本发明重复更新随机二进制序列，直到获得落在相应整数间隔内的随机整数，从而均匀地输出 落在预设整数间隔内的分布式随机整数。

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.