MD5 和 SHA1 的区别

先决条件 – SHA-1 哈希、MD5 和 SHA1
MD5代表Message Digest和SHA1代表Secure Hash Algorithm平方衡量散列算法 MD5 的速度与 SHA1 的速度相比更快。

但是，SHA1 提供了比 MD5 更高的安全性。这些散列算法背后的构造是，这些惯用的平方度量会生成一种新的知识或消息数字指纹，该指纹被理解为散列或摘要。

哈希算法的一些特点如下：

1. 功能不可抑制。
2. 散列(或摘要)的大小通常是固定的，不依赖于信息的规模。
3. 没有 2 个不同的信息集平方度量能够制造相同的散列。

让我们看看下面给出的 MD5 和 SHA1 之间的区别：

S.NO	MD5	SHA1
1.	MD5 stands for Message Digest.	While SHA1 stands for Secure Hash Algorithm.
2.	MD5 can have 128 bits length of message digest.	Whereas SHA1 can have 160 bits length of message digest.
3.	The speed of MD5 is fast in comparison of SHA1’s speed.	While the speed of SHA1 is slow in comparison of MD5’s speed.
4.	To make out the initial message the aggressor would want 2^128 operations whereas exploitation the MD5 algorithmic program.	On the opposite hand, in SHA1 it’ll be 2^160 that makes it quite troublesome to seek out.
5.	MD5 is simple than SHA1.	While SHA1 is more complex than MD5.
6.	MD5 provides indigent or poor security.	While it provides balanced or tolerable security.
7.	In MD5, if the assailant needs to seek out the 2 messages having identical message digest then assailant would need to perform 2^64 operations.	Whereas in SHA1, assailant would need to perform 2^80 operations which is greater than MD5.
8.	MD5 was presented in the year 1992.	While SHA1 was presented in the year 1995.