OK so we're going to talk about Internet check some.
There are several different versions of Internet check some There's IPV four four message length that
a certain size IPV six from the length of a different size etc..
There's also different versions of how to do it.
But we're going to do some version of it.
This is our message.
We're going to break it up into different parts those different parts are going to be the sizes that
we need.
We're going to break it up into four so we're going to break it up into this like that perfectly into
force.
That's step one step two.
We take all those we add them together.
I use this is the hex version of the message.
This is the decimal version of the message.
So just so you can see that this number is equivalent to this.
This number is equivalent of this just so you believe me that adding them together gets me to this number
overall and this is the Hegseth version of that number.
OK so we added them together you can add them together.
I just did in Excel using the hex to binary and hexadecimal decimal to hex functions.
But anyway we get this as our output once we add them together again we break it up into different parts.
We break it up into four and then whatever else we add these two sides together one plus this.
I get this in decimal three to five 5:5 which is this index I'm just showing you in hex and decimals
but it's the same thing you can do the whole thing and hexing the whole thing in binary doesn't matter.
Now we take the the complement of this we take the compliments k now the complement is easy to understand
if we receive this same number in binary.
This is this number in binary.
The combo is just to switch the zeros and ones so that becomes 1 0 0 0 and you switch the zeros ones.
This is that same number up above.
In other words this number right here is a zero the four.
That's what that is in terms of x.
We take that that is the complement of everything.
In other words break them the far four parts added together take.
Break this into two parts add it together take the complements.
OK so that's step three.
So one two three.
Take the complement to you add it together.
Three you actually have the two parts together and four you get the compliments.
We take this compliment and we add it to the message.
So we have a zero D for added to the message now.
So that's part A B C D.
And now he is added to the message in 0 4 although that's completely unclear.
But I just wrote there.
So there you go a zero D for a little bit better.
And now we send this along.
Now if we didn't have any errors the receiver could get this whole message and he could do the same
process to undo it.
He takes a plus b plus he was D-plus.
He adds them all together.
He gets this in terms of in terms of decimal or this in terms of hex.
Now again we do the same procedure we add it all together.
Now we take the two different cards this part and this part and we add them together we get this and
then we do the complement 0 0 0 0.
OK so if you get nothing left over that means that everything is good.
If there's any errors anywhere then you won't have 0 0 0.
OK.
So again Step 1 rake into four parts Step two added together.
Step three take the two different parts add them together.
Step four get the complement step five.
Send the message OK if you want to undo it.
How do you do it.
You do the same process you now take the five cards one ABC you add them together.
That's what you get.
This is it and hacks your hands together.
You add the two parts together.
If I take the compliments 000 done you see that it works.
So that's internet checks and there's all kinds of variations of it.
But this is good and it works and it's super fast that was done all the time in networks.
So there you go.