• Title/Summary/Keyword: Block Cryptographic Algorithm

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(Infirmation Technology- Security techniques- Data integrity mechanism using a cryptographic check function employing a block ciipher algorithm) (IOS/IEC JTC1/SC27의 국제표준소개 (2) : 정보기술-보안기술-블럭 암호화 알고리즘을 사용하여 만든 암호학적 검산 함수를 이용한 데이타 무결성 기법)

  • 이필중
    • Review of KIISC
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    • v.3 no.3
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    • pp.31-39
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    • 1993
  • IOS/IEC JTC1/SC27의 국제표준소개의 첫번째 편으로 DIS 9797을 소개한다. 이것은 1989년에 1차로 국제표준이 되었다가 결함이 발견되어 다시 작업이 시작되어 1992년 10월 SC27정기총회에서 CD(Committee Draft)에서 수정후 DIS(Draft Internationa Standard) 수준으로 올리기로 하여 1993년 3월 DIS로서 표결에 부쳐진 문서이다. 이해를 돕기 위하여 국문뒤에 원문을 덧붙였다. 번역이 적절하지 않거나 더 좋은 표현이 있으면 역자에게 알려주면 참고하여 추후의 수정본에 반영하겠다.

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A New Cryptographic Algorithm for Safe Route Transversal of Data in Smart Cities using Rubik Cube

  • Chhabra, Arpit;Singhal, Niraj;Bansal, Manav;Rizvi, Syed Vilayat
    • International Journal of Computer Science & Network Security
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    • v.22 no.8
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    • pp.113-122
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    • 2022
  • At the point when it is check out ourselves, it might track down various information in each turn or part of our lives. Truth be told, information is the new main thrust of our advanced civilization and in this every day, "information-driven" world, security is the significant angle to consider to guarantee dependability and accessibility of our organization frameworks. This paper includes a new cryptographic algorithm for safe route traversal for data of smart cities which is a contemporary, non-hash, non-straight, 3D encryption execution intended for having information securely scrambled in the interim having a subsequent theoretical layer of safety over it. Encryption generally takes an information string and creates encryption keys, which is the way to unscramble as well. In the interim in another strategy, on the off chance that one can sort out the encryption key, there are opportunities to unravel the information scrambled inside the information string. Be that as it may, in this encryption framework, the work over an encryption key (which is created naturally, henceforth no pre-assurance or uncertainty) just as the calculation produces a "state" in a way where characters are directed into the Rubik block design to disregard the information organization.

Suggestion of CPA Attack and Countermeasure for Super-Light Block Cryptographic CHAM (초경량 블록 암호 CHAM에 대한 CPA 공격과 대응기법 제안)

  • Kim, Hyun-Jun;Kim, Kyung-Ho;Kwon, Hyeok-Dong;Seo, Hwa-Jeong
    • KIPS Transactions on Computer and Communication Systems
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    • v.9 no.5
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    • pp.107-112
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    • 2020
  • Ultra-lightweight password CHAM is an algorithm with efficient addition, rotation and XOR operations on resource constrained devices. CHAM shows high computational performance, especially on IoT platforms. However, lightweight block encryption algorithms used on the Internet of Things may be vulnerable to side channel analysis. In this paper, we demonstrate the vulnerability to side channel attack by attempting a first power analysis attack against CHAM. In addition, a safe algorithm was proposed and implemented by applying a masking technique to safely defend the attack. This implementation implements an efficient and secure CHAM block cipher using the instruction set of an 8-bit AVR processor.

Design of Cryptic Circuit for Passive RFID Tag (수동형 RFID 태그에 적합한 암호 회로의 설계)

  • Lim, Young-Il;Cho, Kyoung-Rok;You, Young-Gap
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.44 no.1
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    • pp.8-15
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    • 2007
  • This paper proposed hardware architecture of the block cryptographic algorithm HIGHT aiming small size and low power application, and analyzed its performance. The HIGHT is a modified algorithm of the Feistel. The encryption and decryption circuit were designed as one iterative block. It reduces the redundant circuit that yields small area. For the performance improvement, the circuit generates 32-bit subkey during 1 clock cycle. we synthesized the HIGHT with Hynix $0.25-{\mu}m$ CMOS technology. The proposed circuit size was 2.658 EG(equivalent gate), and its power consumption was $10.88{\mu}W$ at 2.5V for 100kHz. It is useful for a passive RFID tag or a smart IC card of a small size and low power.

Design of AES Cryptographic Processor with Modular Round Key Generator (모듈화된 라운드 키 생성회로를 갖는 AES 암호 프로세서의 설계)

  • 최병윤;박영수;전성익
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.12 no.5
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    • pp.15-25
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    • 2002
  • In this paper a design of high performance cryptographic processor which implements AES Rijndael algorithm is described. To eliminate performance degradation due to round-key computation delay of conventional processor, the on-the-fly precomputation of round key based on modified round structure is adopted. And on-the-fly round key generator which supports 128, 192, and 256-bit key has modular structure. The designed processor has iterative structure which uses 1 clock cycle per round and supports three operation modes, such as ECB, CBC, and CTR mode which is a candidate for new AES modes of operation. The cryptographic processor designed in Verilog-HDL and synthesized using 0.251$\mu\textrm{m}$ CMOS cell library consists of about 51,000 gates. Simulation results show that the critical path delay is about 7.5ns and it can operate up to 125Mhz clock frequency at 2.5V supply. Its peak performance is about 1.45Gbps encryption or decryption rate under 128-bit key ECB mode.

Design of Encryption/Decryption IP for Lightweight Encryption LEA (경량 블록암호 LEA용 암·복호화 IP 설계)

  • Sonh, Seungil
    • Journal of Internet Computing and Services
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    • v.18 no.5
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    • pp.1-8
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    • 2017
  • Lightweight Encryption Algorithm(LEA) was developed by National Security Research Institute(NSRI) in 2013 and targeted to be suitable for environments for big data processing, cloud service, and mobile. LEA specifies the 128-bit message block size and 128-, 192-, and 256-bit key sizes. In this paper, block cipher LEA algorithm which can encrypt and decrypt 128-bit messages is designed using Verilog-HDL. The designed IP for encryption and decryption has a maximum throughput of 874Mbps in 128-bit key mode and that of 749Mbps in 192 and 656Mbps in 256-bit key modes on Xilinx Vertex5. The cryptographic IP of this paper is applicable as security module of the mobile areas such as smart card, internet banking, e-commerce and IoT.

Isonumber based Iso-Key Interchange Protocol for Network Communication

  • Dani, Mamta S.;Meshram, Akshaykumar;Pohane, Rupesh;Meshram, Rupali R.
    • International Journal of Computer Science & Network Security
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    • v.22 no.2
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    • pp.209-213
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    • 2022
  • Key exchange protocol (KEP) is an essential setup to secure authenticates transmission among two or more users in cyberspace. Digital files protected and transmitted by the encryption of the files over public channels, a single key communal concerning the channel parties and utilized for both to encrypt the files as well as decrypt the files. If entirely done, this impedes unauthorized third parties from imposing a key optimal on the authorized parties. In this article, we have suggested a new KEP term as isokey interchange protocol based on generalization of modern mathematics term as isomathematics by utilizing isonumbers for corresponding isounits over the Block Upper Triangular Isomatrices (BUTI) which is secure, feasible and extensible. We also were utilizing arithmetic operations like Isoaddition, isosubtraction, isomultiplication and isodivision from isomathematics to build iso-key interchange protocol for network communication. The execution of our protocol is for two isointegers corresponding two elements of the group of isomatrices and cryptographic performance of products eachother. We demonstrate the protection of suggested isokey interchange protocol against Brute force attacks, Menezes et al. algorithm and Climent et al. algorithm.

Key-based dynamic S-Box approach for PRESENT lightweight block cipher

  • Yogaraja CA;Sheela Shobana Rani K
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.17 no.12
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    • pp.3398-3415
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    • 2023
  • Internet-of-Things (IoT) is an emerging technology that interconnects millions of small devices to enable communication between the devices. It is heavily deployed across small scale to large scale industries because of its wide range of applications. These devices are very capable of transferring data over the internet including critical data in few applications. Such data is exposed to various security threats and thereby raises privacy-related concerns. Even devices can be compromised by the attacker. Modern cryptographic algorithms running on traditional machines provide authentication, confidentiality, integrity, and non-repudiation in an easy manner. IoT devices have numerous constraints related to memory, storage, processors, operating systems and power. Researchers have proposed several hardware and software implementations for addressing security attacks in lightweight encryption mechanism. Several works have made on lightweight block ciphers for improving the confidentiality by means of providing security level against cryptanalysis techniques. With the advances in the cipher breaking techniques, it is important to increase the security level to much higher. This paper, focuses on securing the critical data that is being transmitted over the internet by PRESENT using key-based dynamic S-Box. Security analysis of the proposed algorithm against other lightweight block cipher shows a significant improvement against linear and differential attacks, biclique attack and avalanche effect. A novel key-based dynamic S-Box approach for PRESENT strongly withstands cryptanalytic attacks in the IoT Network.

A Cryptoprocessor for AES-128/192/256 Rijndael Block Cipher Algorithm (AES-128/192/256 Rijndael 블록암호 알고리듬용 암호 프로세서)

  • 안하기;박광호;신경욱
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.05a
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    • pp.257-260
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    • 2002
  • This paper describes a design of cryptographic processor that implements the AES (Advanced Encryption Standard) block cipher algorithm“Rijndael”. To achieve high throughput rate, a sub-pipeline stage is inserted into the round transformation block, resulting that the second half of current round function and the first half of next round function are being simultaneously operated. For area-efficient and low-power implementation the round transformation block is designed to share the hardware resources in encryption and decryption. An efficient scheme for on-the-fly key scheduling, which supports the three master-key lengths of 128-b/192-b/256-b, is devised to generate round keys in the first sub-pipeline stage of each round processing. The cryptoprocessor designed in Verilog-HDL was verified using Xilinx FPGA board and test system. The core synthesized using 0.35-${\mu}{\textrm}{m}$ CMOS cell library consists of about 25,000 gates. Simulation results show that it has a throughput of about 520-Mbits/sec with 220-MHz clock frequency at 2.5-V supply.

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A Cryptographic Processor Supporting ARIA/AES-based GCM Authenticated Encryption (ARIA/AES 기반 GCM 인증암호를 지원하는 암호 프로세서)

  • Sung, Byung-Yoon;Kim, Ki-Bbeum;Shin, Kyung-Wook
    • Journal of IKEEE
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    • v.22 no.2
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    • pp.233-241
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    • 2018
  • This paper describes a lightweight implementation of a cryptographic processor supporting GCM (Galois/Counter Mode) authenticated encryption (AE) that is based on the two block cipher algorithms of ARIA and AES. It also provides five modes of operation (ECB, CBC, OFB, CFB, CTR) for confidentiality as well as the key lengths of 128-bit and 256-bit. The ARIA and AES are integrated into a single hardware structure, which is based on their algorithm characteristics, and a $128{\times}12-b$ partially parallel GF (Galois field) multiplier is adopted to efficiently perform concurrent processing of CTR encryption and GHASH operation to achieve overall performance optimization. The hardware operation of the ARIA/AES-GCM AE processor was verified by FPGA implementation, and it occupied 60,800 gate equivalents (GEs) with a 180 nm CMOS cell library. The estimated throughput with the maximum clock frequency of 95 MHz are 1,105 Mbps and 810 Mbps in AES mode, 935 Mbps and 715 Mbps in ARIA mode, and 138~184 Mbps in GCM AE mode according to the key length.