I'll give a simple example with (textbook) RSA signing. I'm going to assume you understand RSA.

First key gen:
$p\gets 7,q\gets 13,n\gets pq=91, e\gets 5, d\gets 29$

Thus your public key is $(e,n)$ and your private key is $d$.

Say we want to sign the message $m=35$, we compute $s=m^d\bmod{n}$ which is $s\gets 42\equiv 35^{29}\bmod{n}$.

The message and signature get sent to the other party $(m,s)=(35,42)$. Who takes the signature and raises it to the $e$ modulo $n$, or $42^{5}\equiv 35 \bmod{n}$. Then makes sure that this value is equal to the message that was received, which it is, so the message is valid.

Simple digital signature example with number
I'm having the following problem with IDW automation. I have a catchment and several gauging stations measuring daily precipitation amounts. I would like to interpolate the precipitation amounts from these stations (points) to the whole catchment. In the next step, I would like to calculate average precipitation value for the catchment. I can do it for one day (1 value for each station).
The problem is that I have 30 years of daily precipitation measurements in each station, and so I need to do this process thousands of times. I have created a simple model in model builder which could do this process once, but I am not able to force it to do it repeatedly.

I need help how to automate this process.

Thanks

Here is the modelbuilder scheme:

