Алгоритм безопасной передачи данных между пользователями в сети
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| ABSTRACT
The topic of the bachelor’s thesis is Algorithm for secure data exchange between users on the network using a cryptographic signature. The bachelor’s thesis consists of an explanatory note on 48 pages, including introduction, 19 figures, 3 tables, a list of 20 references including 5 foreign references and 1 appendix. We touched upon the problem of secure data transmission in unreliable communication channels on the Internet. Particular attention was paid to the cryptographic system RSA and Ethereum - open blockchain platform that lets anyone build and use decentralized applications that run on blockchain technology. The program code was written using the JavaScript and Solidity programming languages, and the software platform Node.js. The bachelor’s thesis may be divided into several logically connected parts, which are cryptography, types of encryption, and blockchain technology. The bachelor’s thesis describes encryption in detail. We studied the role of cryptography and security on the Internet. We considered types of encryption, such as symmetric and asymmetric encryption. The reader’s attention is also drawn to Ethereum-technology, why this platform was chosen, and how the smart contract works. Some competitive messengers were compared - WhatsApp, Telegram, and others which use end-to-end encryption and cloud storage. The results of the study showed that using public (decentralized) data storage is safe because it is almost impossible to crack the private Ethereum key. ОГЛАВЛЕНИЕ ВВЕДЕНИЕ ................................................................................................. 5 ГЛАВА 1. СОВРЕМННЫЕ СРЕДСТВА ОБМЕНА ИНФОРМАЦИЕЙ В СЕТИ ИНТЕРНЕТ И АЛГОРИТМЫ ШИФРОВАНИЯ........................................ 6 1.1 Программы по обмену мгновенными сообщениями (мессенджеры)........... 6 1.2 Сравнение популярных мессенджеров ........................................................ 6 1.3 Шифрование данных (криптография) .......................................................... 8 1.3.1 Симметричное шифрование ................................................................... 9 1.3.1.1 Data Encryption Standard (DES) ............................................. 11 1.3.1.2 Advanced Encryption Standard (AES) ..................................... 14 1.3.2 Асимметричное шифрование ............................................................... 16 1.3.2.1 Протокол Диффи – Хеллмана ............................................... 19 1.3.2.2 Алгоритм шифрования RSA ................................................. 22 1.3.2.3 Принцип работы системы RSA ............................................. 24 1.3.2.4 Пример шифрования и расшифрования RSA........................ 25 1.4 Формирование требований к новой технологии ........................................ 27 жүктеу/скачать 1,65 Mb. Достарыңызбен бөлісу:
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