由于MD5 散列法已经被破坏，客户明智地规定，所有密匙必须使用 SHA-1 签名。
Since MD5 hashing has been broken, the client wisely stipulated that all keys must be signed using SHA-1 instead.
散列法实现简单，但会影响中间件的互操作和可移植性，难以保证优先级映射的严格序关系；
Static mapping method is simple to be implemented, but it can break the interoperability, portability and the strict order of middlewares priorities.
散列函数非常复杂，但现代类库中都有现成的类，重要的是，如何对散列法进行细调以获得最好的性能。
Hash functions can be complex and sophisticated, but modern libraries have good defaults. The important thing is how hashes work and how to tune them for maximum performance benefit.
散列函数非常复杂，但现代类库中都有现成的类，重要的是，如何对散列法进行细调以获得最好的性能。
Hash functions can be complex and sophisticated, but modern libraries have good defaults. The important thing is how hashes work and how to tune them for maximum performance benefit.
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