Django Book 翻译
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Adding a *salt* basically an initial random valueto the stored hash adds another layer of difficulty to breaking passwords. Since salts differ from password to password, they also prevent the use of a rainbow table, thus forcing attackers to fall back on a brute-force attack, itself made more difficult by the extra entropy added to the hash by the salt.
翻译:
在存储的hash值的基础上，加入 *salt* 值（一个随机值），增加了密码的强度，使得破解更加困难。因为每个密码的salt值都不相同，这也限制了rainbow table的使用，使得攻击者只能使用最原始的暴力破解方法。而加入的salt值使得hash的熵进一步获得增加，使得暴力破解的难度又进一步加大。
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