{"id":477779,"date":"2023-08-09T09:20:08","date_gmt":"2023-08-09T09:20:08","guid":{"rendered":""},"modified":"2023-09-05T11:15:24","modified_gmt":"2023-09-05T11:15:24","slug":"keystream","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/keystream\/","title":{"rendered":"\u5bc6\u94a5\u6d41"},"content":{"rendered":"<p>\u5173\u4e8e Keystream \u7684\u7b80\u8981\u4fe1\u606f<\/p>\n<p>\u5bc6\u94a5\u6d41\u662f\u6d41\u5bc6\u7801\uff08\u4e00\u79cd\u5bf9\u79f0\u5bc6\u94a5\u5bc6\u7801\u672f\uff09\u4e2d\u4f7f\u7528\u7684\u6bd4\u7279\u5e8f\u5217\u3002\u5b83\u901a\u8fc7\u5c06\u5bc6\u94a5\u6d41\u4e0e\u660e\u6587\u76f8\u7ed3\u5408\u6765\u4ea7\u751f\u5bc6\u6587\u3002\u5982\u679c\u53d1\u9001\u8005\u548c\u63a5\u6536\u8005\u90fd\u77e5\u9053\u76f8\u540c\u7684\u5bf9\u79f0\u5bc6\u94a5\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u5bc6\u94a5\u6d41\u6765\u89e3\u5bc6\u6d88\u606f\u3002\u6b63\u786e\u751f\u6210\u7684\u5bc6\u94a5\u6d41\u5177\u6709\u7c7b\u4f3c\u4e8e\u4e00\u6b21\u6027\u5bc6\u7801\u672c\u7684\u5c5e\u6027\uff0c\u5728\u6b63\u786e\u5904\u7406\u65f6\u53ef\u63d0\u4f9b\u5f3a\u5927\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2>Keystream \u7684\u8d77\u6e90\u548c\u9996\u6b21\u63d0\u53ca\u7684\u5386\u53f2<\/h2>\n<p>Keystream \u7684\u8d77\u6e90\u53ef\u4ee5\u8ffd\u6eaf\u5230 20 \u4e16\u7eaa\u521d\u51fa\u73b0\u7684\u6d41\u5bc6\u7801\u7684\u53d1\u660e\u3002\u4f7f\u7528\u5bc6\u94a5\u6d41\u8fdb\u884c\u52a0\u5bc6\u7684\u6982\u5ff5\u53d7\u5230 Gilbert Vernam \u4e8e 1917 \u5e74\u53d1\u660e\u7684\u4e00\u6b21\u6027\u5bc6\u7801\u672c\u7684\u542f\u53d1\u3002\u5728 20 \u4e16\u7eaa 70 \u5e74\u4ee3\uff0c\u968f\u7740\u8ba1\u7b97\u673a\u6280\u672f\u7684\u8fdb\u6b65\uff0c\u6d41\u5bc6\u7801\u548c\u5bc6\u94a5\u6d41\u53d8\u5f97\u66f4\u52a0\u666e\u904d\uff0c\u7279\u522b\u662f\u5728 RC4 \u7684\u5f00\u53d1\u4e2dRon Rivest \u7684\u7b97\u6cd5\u3002<\/p>\n<h2>\u6709\u5173\u5bc6\u94a5\u6d41\u7684\u8be6\u7ec6\u4fe1\u606f\u3002\u6269\u5c55\u4e3b\u9898\u5bc6\u94a5\u6d41<\/h2>\n<p>\u5bc6\u94a5\u6d41\u672c\u8d28\u4e0a\u662f\u4f7f\u7528\u52a0\u5bc6\u7b97\u6cd5\u751f\u6210\u7684\u968f\u673a\u6216\u4f2a\u968f\u673a\u6570\u6d41\u3002\u4f7f\u7528\u7b80\u5355\u7684\u4e8c\u8fdb\u5236\u8fd0\u7b97\uff08\u4f8b\u5982 XOR\uff09\u5c06\u8be5\u6d41\u4e0e\u660e\u6587\u7ec4\u5408\u4ee5\u521b\u5efa\u5bc6\u6587\u3002\u5bc6\u94a5\u6d41\u7684\u8d28\u91cf\u548c\u5f3a\u5ea6\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u7528\u4e8e\u751f\u6210\u5bc6\u94a5\u6d41\u7684\u7b97\u6cd5\u3002<\/li>\n<li>\u5bc6\u94a5\u957f\u5ea6\u548c\u8d28\u91cf\u3002<\/li>\n<li>\u521d\u59cb\u5316\u5411\u91cf\uff08\u5982\u679c\u9002\u7528\uff09\u3002<\/li>\n<li>\u7528\u4e8e\u5c06\u5bc6\u94a5\u6d41\u4e0e\u660e\u6587\u7ec4\u5408\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<h2>\u5bc6\u94a5\u6d41\u7684\u5185\u90e8\u7ed3\u6784\u3002\u5bc6\u94a5\u6d41\u5982\u4f55\u5de5\u4f5c<\/h2>\n<p>\u5bc6\u94a5\u6d41\u6309\u4ee5\u4e0b\u65b9\u5f0f\u5de5\u4f5c\uff1a<\/p>\n<ol>\n<li><strong>\u521d\u59cb\u5316<\/strong>\uff1a\u4f7f\u7528\u5bc6\u94a5\u548c\u521d\u59cb\u5316\u5411\u91cf\uff08IV\uff09\uff08\u5982\u679c\u9700\u8981\uff09\u6765\u521d\u59cb\u5316\u5bc6\u94a5\u6d41\u751f\u6210\u5668\u3002<\/li>\n<li><strong>\u5bc6\u94a5\u6d41\u751f\u6210<\/strong>\uff1a\u751f\u6210\u5668\u6839\u636e\u5bc6\u94a5\u548c IV \u751f\u6210\u6bd4\u7279\u5e8f\u5217\uff08\u5bc6\u94a5\u6d41\uff09\u3002<\/li>\n<li><strong>\u4e0e\u660e\u6587\u7ec4\u5408<\/strong>\uff1a\u4f7f\u7528\u4e8c\u8fdb\u5236\u8fd0\u7b97\uff08\u901a\u5e38\u662f XOR\uff09\u5c06\u5bc6\u94a5\u6d41\u4e0e\u660e\u6587\u7ec4\u5408\u3002<\/li>\n<li><strong>\u89e3\u5bc6<\/strong>\uff1a\u4f7f\u7528\u76f8\u540c\u5bc6\u94a5\u548c IV \u751f\u6210\u7684\u76f8\u540c\u5bc6\u94a5\u6d41\u7528\u4e8e\u53cd\u8f6c\u64cd\u4f5c\u5e76\u68c0\u7d22\u660e\u6587\u3002<\/li>\n<\/ol>\n<h2>Keystream\u5173\u952e\u7279\u6027\u5206\u6790<\/h2>\n<ul>\n<li><strong>\u5b89\u5168<\/strong>\uff1a\u5982\u679c\u5b9e\u65bd\u6b63\u786e\uff0c\u57fa\u4e8e\u5bc6\u94a5\u6d41\u7684\u5bc6\u7801\u53ef\u63d0\u4f9b\u5f3a\u5927\u7684\u5b89\u5168\u6027\u3002<\/li>\n<li><strong>\u6548\u7387<\/strong>\uff1a\u5bc6\u94a5\u6d41\u5bc6\u7801\u901a\u5e38\u901f\u5ea6\u5feb\u4e14\u8d44\u6e90\u9ad8\u6548\u3002<\/li>\n<li><strong>\u6309\u952e\u7075\u654f\u5ea6<\/strong>\uff1a\u5bc6\u94a5\u7684\u5fae\u5c0f\u53d8\u5316\u4f1a\u4ea7\u751f\u622a\u7136\u4e0d\u540c\u7684\u5bc6\u94a5\u6d41\u3002<\/li>\n<li><strong>\u53ef\u91cd\u7528\u6027\u98ce\u9669<\/strong>\uff1a\u5bf9\u4e0d\u540c\u7684\u6d88\u606f\u91cd\u590d\u4f7f\u7528\u5bc6\u94a5\u6d41\u53ef\u80fd\u4f1a\u635f\u5bb3\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n<h2>\u5199\u51fa\u5b58\u5728\u54ea\u4e9b\u7c7b\u578b\u7684\u5bc6\u94a5\u6d41\u3002\u4f7f\u7528\u8868\u683c\u548c\u5217\u8868\u6765\u7f16\u5199<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u7b97\u6cd5<\/th>\n<th>\u5bc6\u94a5\u6d41\u7c7b\u578b<\/th>\n<th>\u5bc6\u94a5\u957f\u5ea6\uff08\u4f4d\uff09<\/th>\n<th>\u663e\u7740\u7279\u70b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>RC4<\/td>\n<td>\u4f2a\u968f\u673a<\/td>\n<td>40-2048<\/td>\n<td>\u5e7f\u6cdb\u4f7f\u7528<\/td>\n<\/tr>\n<tr>\n<td>\u838e\u838e20<\/td>\n<td>\u4f2a\u968f\u673a<\/td>\n<td>256<\/td>\n<td>\u5b89\u5168\u6027\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>\u6070\u6070<\/td>\n<td>\u4f2a\u968f\u673a<\/td>\n<td>256<\/td>\n<td>\u6539\u826f\u8428\u5c14\u842820<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Keystream\u7684\u4f7f\u7528\u65b9\u6cd5\u3001\u4f7f\u7528\u4e2d\u51fa\u73b0\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6cd5<\/h2>\n<ul>\n<li><strong>\u7528\u6cd5<\/strong>\uff1a\u6570\u636e\u52a0\u5bc6\u3001\u5b89\u5168\u901a\u4fe1\u3001\u6570\u5b57\u7b7e\u540d\u3002<\/li>\n<li><strong>\u95ee\u9898<\/strong>\uff1a\u5bc6\u94a5\u7ba1\u7406\u3001\u5bc6\u94a5\u6d41\u91cd\u7528\u7684\u98ce\u9669\u3001\u7b97\u6cd5\u4e2d\u7684\u6f5c\u5728\u6f0f\u6d1e\u3002<\/li>\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a\u6b63\u786e\u7684\u5bc6\u94a5\u7ba1\u7406\uff0c\u4f7f\u7528\u65b0\u7684 IV\uff0c\u91c7\u7528\u7ecf\u8fc7\u5ba1\u67e5\u548c\u6807\u51c6\u5316\u7684\u7b97\u6cd5\u3002<\/li>\n<\/ul>\n<h2>\u4e3b\u8981\u7279\u70b9\u53ca\u4e0e\u540c\u7c7b\u672f\u8bed\u7684\u5176\u4ed6\u6bd4\u8f83\u4ee5\u8868\u683c\u548c\u5217\u8868\u7684\u5f62\u5f0f<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u5b66\u671f<\/th>\n<th>\u4e3b\u8981\u7279\u5f81<\/th>\n<th>\u4e0e Keystream \u7684\u76f8\u4f3c\u4e4b\u5904<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5206\u7ec4\u5bc6\u7801<\/td>\n<td>\u52a0\u5bc6\u56fa\u5b9a\u5927\u5c0f\u5757\u4e2d\u7684\u6570\u636e<\/td>\n<td>\u5bf9\u79f0\u5bc6\u94a5\u5bc6\u7801\u5b66<\/td>\n<\/tr>\n<tr>\n<td>\u6d41\u5bc6\u7801<\/td>\n<td>\u4f7f\u7528\u5bc6\u94a5\u6d41\u4e00\u6b21\u5bf9\u6570\u636e\u52a0\u5bc6\u4e00\u4f4d\u6216\u4e00\u4e2a\u5b57\u8282<\/td>\n<td>\u4f7f\u7528\u5bc6\u94a5\u6d41<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u6b21\u6027\u57ab<\/td>\n<td>\u4f7f\u7528\u771f\u6b63\u968f\u673a\u7684\u5bc6\u94a5\u6d41<\/td>\n<td>\u5982\u679c\u4f7f\u7528\u5f97\u5f53\uff0c\u7edd\u5bf9\u5b89\u5168<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4e0e Keystream \u76f8\u5173\u7684\u672a\u6765\u524d\u666f\u548c\u6280\u672f<\/h2>\n<p>\u4e0e\u5bc6\u94a5\u6d41\u76f8\u5173\u7684\u672a\u6765\u53d1\u5c55\u53ef\u80fd\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6297\u91cf\u5b50\u7b97\u6cd5\u3002<\/li>\n<li>\u63d0\u9ad8\u4e86\u7269\u8054\u7f51\u8bbe\u5907\u7684\u6548\u7387\u3002<\/li>\n<li>\u4e0e\u6df7\u5408\u52a0\u5bc6\u7cfb\u7edf\u96c6\u6210\u3002<\/li>\n<li>\u5236\u5b9a\u65b0\u7684\u6807\u51c6\u548c\u6cd5\u89c4\u3002<\/li>\n<\/ul>\n<h2>\u5982\u4f55\u4f7f\u7528\u4ee3\u7406\u670d\u52a1\u5668\u6216\u5982\u4f55\u5c06\u4ee3\u7406\u670d\u52a1\u5668\u4e0e\u5bc6\u94a5\u6d41\u5173\u8054<\/h2>\n<p>\u4ee3\u7406\u670d\u52a1\u5668\uff08\u5982 OneProxy \u63d0\u4f9b\u7684\u4ee3\u7406\u670d\u52a1\u5668\uff09\u53ef\u4ee5\u4e0e\u5bc6\u94a5\u6d41\u5bc6\u7801\u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u589e\u5f3a\u5b89\u5168\u6027\u548c\u9690\u79c1\u6027\u3002\u5bc6\u94a5\u6d41\u52a0\u5bc6\u53ef\u5e94\u7528\u4e8e\u901a\u8fc7\u4ee3\u7406\u670d\u52a1\u5668\u4f20\u8f93\u7684\u6570\u636e\uff0c\u786e\u4fdd\u673a\u5bc6\u6027\u548c\u5b8c\u6574\u6027\u3002\u8fd9\u79cd\u6280\u672f\u7684\u878d\u5408\u5bf9\u4e8e\u7ef4\u6301\u5b89\u5168\u548c\u533f\u540d\u7684\u5728\u7ebf\u72b6\u6001\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<h2>\u76f8\u5173\u94fe\u63a5<\/h2>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Stream_cipher\" target=\"_new\" rel=\"noopener nofollow\">\u6d41\u5bc6\u7801\u7ef4\u57fa\u767e\u79d1\u9875\u9762<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc7465\" target=\"_new\" rel=\"noopener nofollow\">RC4\u7b97\u6cd5\u6587\u6863<\/a><\/li>\n<li><a href=\"https:\/\/cr.yp.to\/snuffle.html\" target=\"_new\" rel=\"noopener nofollow\">Salsa20 \u548c ChaCha \u7b97\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/cn\/\" target=\"_new\" rel=\"noopener\">OneProxy\u7f51\u7ad9<\/a><\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u94fe\u63a5\u63d0\u4f9b\u6709\u5173\u5bc6\u94a5\u6d41\u3001\u5176\u5e94\u7528\u7a0b\u5e8f\u53ca\u5176\u76f8\u5173\u52a0\u5bc6\u7b97\u6cd5\u7684\u66f4\u5e7f\u6cdb\u4fe1\u606f\uff0c\u4ee5\u53ca\u6709\u5173 OneProxy \u670d\u52a1\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>","protected":false},"featured_media":468735,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477779","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Keystream<\/mark>","faq_items":[{"question":"What is a keystream and how does it work in cryptography?","answer":"<p>A keystream is a sequence of bits used in stream ciphers, a type of symmetric key cryptography. It operates by combining the keystream with the plaintext to produce ciphertext. The same keystream is then used to decrypt the message, provided that the same symmetric key is known to both sender and receiver. The process involves initialization with a secret key, keystream generation, combination with plaintext, and decryption.<\/p>"},{"question":"What are some notable algorithms that utilize keystream?","answer":"<p>Some notable algorithms that utilize keystream include RC4, Salsa20, and ChaCha. They differ in key length and features, with RC4 being widely used, Salsa20 known for high security, and ChaCha as an improved version of Salsa20.<\/p>"},{"question":"How can the security of a keystream be compromised?","answer":"<p>The security of a keystream can be compromised through poor key management, the reuse of a keystream with different messages, or potential vulnerabilities in the algorithm used. Proper key management, using fresh initialization vectors, and employing vetted and standardized algorithms are essential practices to maintain security.<\/p>"},{"question":"What's the difference between keystream, block ciphers, and one-time pads?","answer":"<p>Keystream is used in stream ciphers that encrypt data one bit or byte at a time. Block ciphers encrypt data in fixed-size blocks, while one-time pads use a truly random keystream and offer perfect security if used properly. Both block and stream ciphers are forms of symmetric key cryptography.<\/p>"},{"question":"How are proxy servers like OneProxy related to keystream?","answer":"<p>Proxy servers like OneProxy can be used in combination with keystream ciphers to enhance online security and privacy. Keystream encryption can be applied to data transmitted through a proxy server, providing confidentiality and integrity, and thus creating a secure and anonymous online environment.<\/p>"},{"question":"What are the future prospects and technologies related to keystream?","answer":"<p>Future developments related to keystream might include the creation of quantum-resistant algorithms, improved efficiency for IoT devices, integration with hybrid cryptographic systems, and the development of new standards and regulations.<\/p>"},{"question":"Where can I find more information and resources about keystream?","answer":"<p>You can find more information about keystream through various online resources, including the Wikipedia page on stream ciphers, the RC4 Algorithm Documentation, and details about Salsa20 and ChaCha algorithms. For proxy services that can be used with keystream, you may refer to the OneProxy website.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/477779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/477779\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media\/468735"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=477779"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}