内容简介：golang中的fnv包实现了非加密hash函数Every cryptographic hash function is a hash function. But not every hash function is a cryptographic hash.A cryptographic hash function aims to guarantee a number of security properties. Most importantly that it's hard to find coll
golang中的fnv包实现了非加密hash函数
What is the difference between a Hash Function and a Cryptographic Hash Function?
Every cryptographic hash function is a hash function. But not every hash function is a cryptographic hash.
A cryptographic hash function aims to guarantee a number of security properties. Most importantly that it's hard to find collisions or pre-images and that the output appears random. (There are a few more properties, and "hard" has well defined bounds in this context, but that's not important here.)
Non cryptographic hash functions just try to avoid collisions for non malicious input. Some aim to detect accidental changes in data (CRCs), others try to put objects into different buckets in a hash table with as few collisions as possible.
In exchange for weaker guarantees they are typically (much) faster.
I'd still call MD5 a cryptographic hash function, since it aimed to provide security. But it's broken, and thus no longer usable as a cryptographic hash. On the other hand when you have a non cryptographic hash function, you can't really call it "broken", since it never tried to be secure in the first place.
非加密hash只是避免非恶意输入的碰撞。
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大数据系统构建
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随着社交网络、网络分析和智能型电子商务的兴起，传统的数据库系统显然已无法满足海量数据的管理需求。 作为一种新的处理模式，大数据系统应运而生，它使用多台机器并行工作，能够对海量数据进行存储、处理、分析，进而帮助用户从中提取对优化流程、实现高增长率的有用信息，做更为精准有效的决策。 但不可忽略的是，它也引入了大多数开发者并不熟悉的、困扰传统架构的复杂性问题。 本书将教你充分利用集群硬件优势的La......一起来看看 《大数据系统构建》 这本书的介绍吧!
