Which sha algorithm should i use

Learn more. Ask Question. Asked 10 years, 9 months ago. Active 5 years, 6 months ago. Viewed 28k times. Improve this question. Majd Majd 1, 3 3 gold badges 14 14 silver badges 28 28 bronze badges. Add a comment. Active Oldest Votes. So, when in doubt, use SHA If you plan on using SHA-1 then you should doubt.

Improve this answer. Community Bot 1 1 1 silver badge. Thomas Pornin Thomas Pornin Thanks : that's exactly the explanation i was looking for : — Majd. If there's none, i need your permission to use it. For the official security analysis: csrc. For performance, have a look at: csrc. SHA-2 is stronger and better suited to security-sensitive applications such as digital signing.

SHA-1 is good when you need a shorter hash and security is not an issue e. Joe Albahari Joe Albahari Seems logical. Any references please? The SHA-1 implementation in. I did some similar performance testing yesterday, and got about the same relative answers. By , it became mandatory for SHA-2 to be used for all new certificates. However, some old certificates remain, which is why SHA-1 is still being used to this day.

Since the switch to SHA-2 was only made two years ago, there are tons of websites that still communicate using the first version of the hashing algorithm. Failing to update your version of SHA could compromise your security standing and cause users to shy away from visiting your site due to enhanced security protocol from Chrome and other browsers.

To avoid traffic loss, update your SHA version as soon as you can. As of today, it is no longer considered to be any less resistant to attack than MD5. The SHA algorithm returns hash value of bits, or 64 hexadecimal digits.

While not quite perfect, current research indicates it is considerably more secure than either MD5 or SHA This hash method was developed in late , and has not seen widespread use yet. Its algorithm is unrelated to the one used by its predecessor, SHA The SHA algorithm is a variant with equivalent applicability to that of the earlier SHA, with the former taking slightly longer to calculate than the later.

A typical use of hash functions is to perform validation checks. One frequent usage is the validation of compressed collections of files, such as. Given an archive and its expected hash value commonly referred to as a checksum , you can perform your own hash calculation to validate that the archive you received is complete and uncorrupted.

For instance, I can generate an MD5 checksum for a tar file in Unix using the following piped commands:. The generated checksum can be posted on the download site, next to the archive download link. The receiver, once they have downloaded the archive, can validate that it came across correctly by running the following command:. Successful execution of the above command will generate an OK status like this:. If you read this far, tweet to the author to show them you care. Tweet a thanks. Learn to code for free.