Sha1 Generator

In cryptography, SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function designed by the United States National Security Agency and is a U.S. Federal Information Processing Standard published by the United States NIST.[2] SHA-1 produces a 160-bit (20-byte) hash value known as a message digest. A SHA-1 hash value is typically rendered as a hexadecimal number, 40 digits long.

SHA-1 is no longer considered secure against well-funded opponents. In 2005, cryptanalysts found attacks on SHA-1 suggesting that the algorithm might not be secure enough for ongoing use,[3] and since 2010 many organizations have recommended its replacement by SHA-2 or SHA-3.[4][5][6] Microsoft,[7] Google[8] and Mozilla[9][10][11] have all announced that their respective browsers will stop accepting SHA-1 SSL certificates by 2017.

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SHA-1(安全散列算法1)是一种密码散列函数,美国国家安全局设计,并由美国国家标准技术研究所(NIST)发布为联邦数据处理标准(FIPS)[2]。SHA-1可以生成一个被称为消息摘要的160位(20字节)散列值,散列值通常的呈现形式为40个十六进制数。

SHA-1已经不再视为可抵御有充足资金、充足计算资源的攻击者。2005年,密码分析人员发现了对SHA-1的有效攻击方法,这表明该算法可能不够安全,不能继续使用[3],自2010年以来,许多组织建议用SHA-2或SHA-3来替换SHA-1[4][5][6]。Microsoft[7]、Google[8]以及Mozilla[9][10][11]都宣布,它们旗下的浏览器将在2017年前停止接受使用SHA-1算法签名的SSL证书。

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