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Обеспечивает защиту информации от несанкционированного доступа. Достигается с помощью шифрования.\r\n\r\n2. **Целостность**:\r\n - Гарантирует, что данные не были изменены или повреждены. Это достигается с помощью хеширования и цифровых подписей.\r\n\r\n3. **Аутентификация**:\r\n - Подтверждает личность отправителя или источника данных. Используются цифровые подписи и сертификаты.\r\n\r\n### Шифрование\r\n\r\nШифрование — это процесс преобразования открытого текста в шифротекст с помощью алгоритма и ключа. Существует два основных типа шифрования:\r\n\r\n1. **Симметричное шифрование**:\r\n - Используется один и тот же ключ для шифрования и дешифрования.\r\n - Примеры: AES (Advanced Encryption Standard), DES (Data Encryption Standard).\r\n\r\n2. **Асимметричное шифрование**:\r\n - Используются два ключа: публичный (для шифрования) и приватный (для дешифрования).\r\n - Примеры: RSA, DSA.\r\n\r\n### Хеширование\r\n\r\nХеширование — это процесс преобразования данных в фиксированный размер строки (хеш). Хеш-функции являются односторонними, то есть нельзя восстановить исходные данные из хеша. Примеры алгоритмов: SHA-256, MD5.\r\n\r\n### Цифровые подписи\r\n\r\nЦифровые подписи используются для подтверждения подлинности и целостности данных. Они создаются с использованием приватного ключа и могут быть проверены с помощью соответствующего публичного ключа.\r\n\r\n### Применение криптографии в Java\r\n\r\nJava предоставляет мощные инструменты для работы с криптографией через пакет `javax.crypto`. Вот пример симметричного шифрования с использованием алгоритма AES.\r\n\r\n#### Пример симметричного шифрования с использованием AES\r\n\r\n```java\r\nimport javax.crypto.Cipher;\r\nimport javax.crypto.KeyGenerator;\r\nimport javax.crypto.SecretKey;\r\nimport javax.crypto.spec.SecretKeySpec;\r\nimport java.util.Base64;\r\n\r\npublic class AESCryptoExample {\r\n public static void main(String[] args) throws Exception {\r\n String originalText = \"Hello, World!\";\r\n \r\n // Генерация ключа\r\n KeyGenerator keyGen = KeyGenerator.getInstance(\"AES\");\r\n keyGen.init(128); // Длина ключа\r\n SecretKey secretKey = keyGen.generateKey();\r\n\r\n // Шифрование\r\n Cipher cipher = Cipher.getInstance(\"AES\");\r\n cipher.init(Cipher.ENCRYPT_MODE, secretKey);\r\n byte[] encryptedBytes = cipher.doFinal(originalText.getBytes());\r\n String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);\r\n System.out.println(\"Encrypted Text: \" + encryptedText);\r\n\r\n // Дешифрование\r\n cipher.init(Cipher.DECRYPT_MODE, secretKey);\r\n byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedText));\r\n String decryptedText = new String(decryptedBytes);\r\n System.out.println(\"Decrypted Text: \" + decryptedText);\r\n }\r\n}\r\n```\r\n","votes_up_count":1,"votes_down_count":0,"created_at":"2024-11-11T12:37:38.441Z","user_id":198906,"category_slug":"java"}],"relatedQuestions":[{"creator":{"id":104929,"email":"feycot@gmail.com","first_name":"Nikolai","last_name":"Gagarinov","telegram":"","full_name":"Nikolai Gagarinov","removed":false},"category":{"id":4,"title":"Java","slug":"java","questions_count":931,"locale":"ru"},"tags":[{"id":887,"slug":"java","name":"Java"}],"id":5061,"answers_count":1,"slug":"kakie-vidy-konstruktorov-suschestvuyut-v-java-kak-proishodit-ih-initsializatsiya-i-kakie-est-primery","state":"published","title":"какие виды конструкторов существуют в java как происходит их инициализация и какие есть 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Достигается с помощью шифрования.\r\n\r\n2. **Целостность**:\r\n - Гарантирует, что данные не были изменены или повреждены. Это достигается с помощью хеширования и цифровых подписей.\r\n\r\n3. **Аутентификация**:\r\n - Подтверждает личность отправителя или источника данных. Используются цифровые подписи и сертификаты.\r\n\r\n### Шифрование\r\n\r\nШифрование — это процесс преобразования открытого текста в шифротекст с помощью алгоритма и ключа. Существует два основных типа шифрования:\r\n\r\n1. **Симметричное шифрование**:\r\n - Используется один и тот же ключ для шифрования и дешифрования.\r\n - Примеры: AES (Advanced Encryption Standard), DES (Data Encryption Standard).\r\n\r\n2. **Асимметричное шифрование**:\r\n - Используются два ключа: публичный (для шифрования) и приватный (для дешифрования).\r\n - Примеры: RSA, DSA.\r\n\r\n### Хеширование\r\n\r\nХеширование — это процесс преобразования данных в фиксированный размер строки (хеш). Хеш-функции являются односторонними, то есть нельзя восстановить исходные данные из хеша. Примеры алгоритмов: SHA-256, MD5.\r\n\r\n### Цифровые подписи\r\n\r\nЦифровые подписи используются для подтверждения подлинности и целостности данных. Они создаются с использованием приватного ключа и могут быть проверены с помощью соответствующего публичного ключа.\r\n\r\n### Применение криптографии в Java\r\n\r\nJava предоставляет мощные инструменты для работы с криптографией через пакет `javax.crypto`. Вот пример симметричного шифрования с использованием алгоритма AES.\r\n\r\n#### Пример симметричного шифрования с использованием AES\r\n\r\n```java\r\nimport javax.crypto.Cipher;\r\nimport javax.crypto.KeyGenerator;\r\nimport javax.crypto.SecretKey;\r\nimport javax.crypto.spec.SecretKeySpec;\r\nimport java.util.Base64;\r\n\r\npublic class AESCryptoExample {\r\n public static void main(String[] args) throws Exception {\r\n String originalText = "Hello, World!";\r\n \r\n // Генерация ключа\r\n KeyGenerator keyGen = KeyGenerator.getInstance("AES");\r\n keyGen.init(128); // Длина ключа\r\n SecretKey secretKey = keyGen.generateKey();\r\n\r\n // Шифрование\r\n Cipher cipher = Cipher.getInstance("AES");\r\n cipher.init(Cipher.ENCRYPT_MODE, secretKey);\r\n byte[] encryptedBytes = cipher.doFinal(originalText.getBytes());\r\n String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);\r\n System.out.println("Encrypted Text: " + encryptedText);\r\n\r\n // Дешифрование\r\n cipher.init(Cipher.DECRYPT_MODE, secretKey);\r\n byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedText));\r\n String decryptedText = new String(decryptedBytes);\r\n System.out.println("Decrypted Text: " + decryptedText);\r\n }\r\n}\r\n```\r\n","datePublished":"2024-11-11T12:37:38.441Z","upvoteCount":1,"author":{"@type":"Person","name":"Maksim Litvinov"},"url":"https://ru.hexlet.io/qna/java/questions/kakovy-osnovy-kriptografii-dlya-nachinayuschih-vklyuchaya-shifrovanie-i-primenenie-v-java#answer-4467"}}}</script><div style="--container-size:var(--container-size-lg);margin-top:var(--mantine-spacing-xl);height:100%" class="m_7485cace mantine-Container-root" data-size="lg" data-strategy="block"><script type="application/ld+json">{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"position":1,"@type":"ListItem","item":{"@id":"/qna","name":"Вопросы и ответы"}},{"position":2,"@type":"ListItem","item":{"@id":"/qna/java/questions","name":"Java"}},{"position":3,"@type":"ListItem","item":{"@id":"/qna/java/questions/kakovy-osnovy-kriptografii-dlya-nachinayuschih-vklyuchaya-shifrovanie-i-primenenie-v-java","name":"каковы основы криптографии для начинающих включая шифрование и применение в java\r"}}]}</script><div style="margin-bottom:var(--mantine-spacing-xs)" class="m_8b3717df mantine-Breadcrumbs-root"><a style="--text-fz:var(--mantine-font-size-sm);--text-lh:var(--mantine-line-height-sm);white-space:normal;color:inherit" class="mantine-focus-auto m_849cf0da m_f678d540 mantine-Breadcrumbs-breadcrumb m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-size="sm" data-underline="hover" href="/"><div style="color:inherit" class="m_4451eb3a mantine-Center-root"><svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-home-link "><path d="M20.085 11.085l-8.085 -8.085l-9 9h2v7a2 2 0 0 0 2 2h4.5"></path><path d="M9 21v-6a2 2 0 0 1 2 -2h2a2 2 0 0 1 1.807 1.143"></path><path d="M20 21a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path><path d="M20 16a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path><path d="M15 19a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path><path d="M21 16l-5 3l5 2"></path></svg></div></a><div class="m_3b8f2208 mantine-Breadcrumbs-separator">/</div><a style="--text-fz:var(--mantine-font-size-sm);--text-lh:var(--mantine-line-height-sm);white-space:normal;color:inherit" class="mantine-focus-auto m_849cf0da m_f678d540 mantine-Breadcrumbs-breadcrumb m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-size="sm" data-underline="hover" href="/qna">Вопросы и ответы</a><div class="m_3b8f2208 mantine-Breadcrumbs-separator">/</div><a style="--text-fz:var(--mantine-font-size-sm);--text-lh:var(--mantine-line-height-sm);white-space:normal;color:inherit" class="mantine-focus-auto m_849cf0da m_f678d540 mantine-Breadcrumbs-breadcrumb m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-size="sm" data-underline="hover" href="/qna/java/questions">Java</a><div class="m_3b8f2208 mantine-Breadcrumbs-separator">/</div><p style="--text-fz:var(--mantine-font-size-sm);--text-lh:var(--mantine-line-height-sm);white-space:normal;color:var(--mantine-color-dimmed)" class="mantine-focus-auto m_f678d540 mantine-Breadcrumbs-breadcrumb m_b6d8b162 mantine-Text-root" data-size="sm">каковы основы криптографии для начинающих включая шифрование и применение в java
</p></div><style data-mantine-styles="inline">.__m__-_R_eub_{margin-bottom:var(--mantine-spacing-xs);}@media(min-width: 36em){.__m__-_R_eub_{margin-bottom:var(--mantine-spacing-xs);}}</style><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root __m__-_R_eub_"><style data-mantine-styles="inline">.__m__-_R_deub_{width:100%;}@media(min-width: 36em){.__m__-_R_deub_{width:70%;}}@media(min-width: 75em){.__m__-_R_deub_{width:75%;}}</style><div class="__m__-_R_deub_"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><h1 style="--title-fw:var(--mantine-h1-font-weight);--title-lh:var(--mantine-h1-line-height);--title-fz:var(--mantine-h1-font-size)" class="m_8a5d1357 mantine-Title-root" data-order="1">каковы основы криптографии для начинающих включая шифрование и применение в java
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href="/qna/java/tags/java"><div style="--badge-height:var(--badge-height-sm);--badge-padding-x:var(--badge-padding-x-sm);--badge-fz:var(--badge-fz-sm);--badge-bg:var(--mantine-color-default);--badge-color:var(--mantine-color-default-color);--badge-bd:calc(0.0625rem * var(--mantine-scale)) solid var(--mantine-color-default-border);cursor:pointer" class="m_347db0ec mantine-Badge-root" data-variant="default" data-size="sm"><span class="m_5add502a mantine-Badge-label">Java</span></div></a></div><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:flex-start;--group-wrap:wrap;margin-bottom:var(--mantine-spacing-xl);font-size:var(--mantine-font-size-sm)" class="m_4081bf90 mantine-Group-root"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:wrap;margin-inline-start:auto" class="m_4081bf90 mantine-Group-root"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-calendar "><path d="M4 7a2 2 0 0 1 2 -2h12a2 2 0 0 1 2 2v12a2 2 0 0 1 -2 2h-12a2 2 0 0 1 -2 -2v-12"></path><path d="M16 3v4"></path><path d="M8 3v4"></path><path d="M4 11h16"></path><path d="M11 15h1"></path><path d="M12 15v3"></path></svg><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root" data-inherit="true">год назад</p></div><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-user "><path d="M8 7a4 4 0 1 0 8 0a4 4 0 0 0 -8 0"></path><path d="M6 21v-2a4 4 0 0 1 4 -4h4a4 4 0 0 1 4 4v2"></path></svg><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root" data-inherit="true">Nikolai Gagarinov</p></div></div><div role="link" tabindex="0" style="cursor:pointer"><button style="display:block;width:100%" class="mantine-focus-auto m_87cf2631 mantine-UnstyledButton-root" type="button" aria-label="Присоединяйтесь к нашему Telegram-сообществу"><div style="background-color:light-dark(var(--mantine-color-gray-1), var(--mantine-color-dark-6));margin-block:var(--mantine-spacing-xs)" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:flex-start;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><div style="--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:auto;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-brand-telegram "><path d="M15 10l-4 4l6 6l4 -16l-18 7l4 2l2 6l3 -4"></path></svg></div>Присоединяйтесь к нашему Telegram-сообществу</div></div></button></div><h2 style="--title-fw:var(--mantine-h2-font-weight);--title-lh:var(--mantine-h2-line-height);--title-fz:var(--mantine-h2-font-size);margin-block:var(--mantine-spacing-xl)" class="m_8a5d1357 mantine-Title-root" data-order="2">Ответы</h2><div style="margin-bottom:var(--mantine-spacing-xl);padding:var(--mantine-spacing-lg)" class="m_e615b15f mantine-Card-root m_1b7284a3 mantine-Paper-root" data-with-border="true" id="answer-4467"><div style="--group-gap:calc(1.125rem * var(--mantine-scale));--group-align:stretch;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><div style="--stack-gap:var(--mantine-spacing-md);--stack-align:stretch;--stack-justify:flex-start;font-size:var(--mantine-font-size-h1);font-weight:lighter;text-align:center" class="m_6d731127 mantine-Stack-root">1<a style="color:inherit" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="/qna/java/questions/kakovy-osnovy-kriptografii-dlya-nachinayuschih-vklyuchaya-shifrovanie-i-primenenie-v-java/answers/4467/vote"><div style="--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-thumb-up "><path d="M7 11v8a1 1 0 0 1 -1 1h-2a1 1 0 0 1 -1 -1v-7a1 1 0 0 1 1 -1h3a4 4 0 0 0 4 -4v-1a2 2 0 0 1 4 0v5h3a2 2 0 0 1 2 2l-1 5a2 3 0 0 1 -2 2h-7a3 3 0 0 1 -3 -3"></path></svg></div></a><div style="--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-check "><path d="M5 12l5 5l10 -10"></path></svg></div></div><div style="--stack-gap:var(--mantine-spacing-md);--stack-align:stretch;--stack-justify:flex-start;width:100%;min-width:0rem" class="m_6d731127 mantine-Stack-root"><div style="margin-bottom:auto" class="m_d08caa0 mantine-Typography-root"><p>Криптография — это наука о защите информации с помощью математических методов, которая обеспечивает конфиденциальность, целостность и аутентичность данных.</p>
<h3 id="heading-3-1">Основные концепции криптографии</h3>
<ol>
<li>
<p><strong>Конфиденциальность</strong>:</p>
<ul>
<li>Обеспечивает защиту информации от несанкционированного доступа. Достигается с помощью шифрования.</li>
</ul>
</li>
<li>
<p><strong>Целостность</strong>:</p>
<ul>
<li>Гарантирует, что данные не были изменены или повреждены. Это достигается с помощью хеширования и цифровых подписей.</li>
</ul>
</li>
<li>
<p><strong>Аутентификация</strong>:</p>
<ul>
<li>Подтверждает личность отправителя или источника данных. Используются цифровые подписи и сертификаты.</li>
</ul>
</li>
</ol>
<h3 id="heading-3-2">Шифрование</h3>
<p>Шифрование — это процесс преобразования открытого текста в шифротекст с помощью алгоритма и ключа. Существует два основных типа шифрования:</p>
<ol>
<li>
<p><strong>Симметричное шифрование</strong>:</p>
<ul>
<li>Используется один и тот же ключ для шифрования и дешифрования.</li>
<li>Примеры: AES (Advanced Encryption Standard), DES (Data Encryption Standard).</li>
</ul>
</li>
<li>
<p><strong>Асимметричное шифрование</strong>:</p>
<ul>
<li>Используются два ключа: публичный (для шифрования) и приватный (для дешифрования).</li>
<li>Примеры: RSA, DSA.</li>
</ul>
</li>
</ol>
<h3 id="heading-3-3">Хеширование</h3>
<p>Хеширование — это процесс преобразования данных в фиксированный размер строки (хеш). Хеш-функции являются односторонними, то есть нельзя восстановить исходные данные из хеша. Примеры алгоритмов: SHA-256, MD5.</p>
<h3 id="heading-3-4">Цифровые подписи</h3>
<p>Цифровые подписи используются для подтверждения подлинности и целостности данных. Они создаются с использованием приватного ключа и могут быть проверены с помощью соответствующего публичного ключа.</p>
<h3 id="heading-3-5">Применение криптографии в Java</h3>
<p>Java предоставляет мощные инструменты для работы с криптографией через пакет <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">javax.crypto</code>. Вот пример симметричного шифрования с использованием алгоритма AES.</p>
<h4 id="heading-4-6">Пример симметричного шифрования с использованием AES</h4>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;
public class AESCryptoExample {
public static void main(String[] args) throws Exception {
String originalText = "Hello, World!";
// Генерация ключа
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
keyGen.init(128); // Длина ключа
SecretKey secretKey = keyGen.generateKey();
// Шифрование
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
byte[] encryptedBytes = cipher.doFinal(originalText.getBytes());
String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);
System.out.println("Encrypted Text: " + encryptedText);
// Дешифрование
cipher.init(Cipher.DECRYPT_MODE, secretKey);
byte[] decryptedBytes = cipher.doFinal(Base64.getDecoder().decode(encryptedText));
String decryptedText = new String(decryptedBytes);
System.out.println("Decrypted Text: " + decryptedText);
}
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div></div><div class="m_3eebeb36 mantine-Divider-root" data-orientation="horizontal" role="separator"></div><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:flex-start;--group-wrap:wrap;font-size:var(--mantine-font-size-sm)" class="m_4081bf90 mantine-Group-root"><div style="--group-gap:var(--mantine-spacing-xs);--group-align:center;--group-justify:flex-start;--group-wrap:wrap;margin-inline-start:auto" class="m_4081bf90 mantine-Group-root"><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-calendar "><path d="M4 7a2 2 0 0 1 2 -2h12a2 2 0 0 1 2 2v12a2 2 0 0 1 -2 2h-12a2 2 0 0 1 -2 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mantine-Paper-root" data-with-border="true"><div style="--group-gap:calc(0.25rem * var(--mantine-scale));--group-align:center;--group-justify:flex-start;--group-wrap:nowrap" class="m_4081bf90 mantine-Group-root"><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">1 месяц</span><span class="mantine-focus-auto m_b6d8b162 mantine-Text-root">·</span><span style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Для продвинутых</span></div><p style="margin-bottom:var(--mantine-spacing-sm);font-size:var(--mantine-font-size-h5);font-weight:bold" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">СИКП на Java</p><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Изучите фундаментальные принципы программирования на Java</p><div style="margin-top:auto" class=""><div class="m_4451eb3a mantine-Center-root"><img style="opacity:0.8;width:70%" class="m_9e117634 mantine-Image-root mantine-visible-from-xs" src="https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NDAxNiwicHVyIjoiYmxvYl9pZCJ9fQ==--eb66b9b5e26fafa32844ce0f4522c3ed84544040/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJ3ZWJwIiwicmVzaXplX3RvX2xpbWl0IjpbNDAwLDQwMF0sInNhdmVyIjp7InF1YWxpdHkiOjg1fX0sInB1ciI6InZhcmlhdGlvbiJ9fQ==--5b6f46dacd1af664f27558553a58076185091823/Hand%20coding-rafiki.png" alt="СИКП на Java" loading="eager"/></div><div style="--group-gap:var(--mantine-spacing-md);--group-align:end;--group-justify:space-between;--group-wrap:wrap;margin-top:var(--mantine-spacing-xs)" class="m_4081bf90 mantine-Group-root"><p style="font-size:var(--mantine-font-size-xl)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">от 3 900 ₽</p><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Посмотреть →</p></div></div></div></a></div></div><div class="m_d98df724 mantine-Carousel-slide" data-orientation="horizontal"><div 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