Join Mike Meyers for an in-depth discussion in this video Cryptographic hashes, part of CompTIA Network+ Exam Prep (N10-006) Part 4: Making TCP/IP Work.
- In the world of data security, encryption is important,…but there's also a lot of times…where I just wanna verify that the data is good.…Like, for example, I've got this big pile of text,…it could be a Word document, I don't care what it is,…but while I'm sending this to somebody else…and as they receive it, I wanna make sure…that everything is exactly the same.…Now, to do that, we use something called a "hash".…A hash is an algorithm that doesn't encrypt,…but what it does instead,…is it takes a big string of data like this,…so we take it and we throw it into the hash algorithm,…gotta turn the crank, very important,…and the end result is a string of text,…a binary value, that is fixed in size.…
What's important to appreciate about this…is that I can take another…completely different piece of text,…and notice that this is a lot smaller,…I can run it through the algorithm,…and I will still get a fixed amount of text.…In this case, it's 128 bits.…It's 32 hexadecimal values.…So no matter what I run through it,…it will always come out the same size.…
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Skill Level Intermediate
1. TCP/IP Applications
2. Network Naming
3. Securing TCP/IP
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