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DSA stands for Digital Signature Algorithm. It is a cryptographic algorithm used to generate digital signatures, authenticate the sender of a digital message, and prevent message tampering. DSA works by having two keys: a private key owned by the sender and a public key held by the receiver. The sender uses their private key to generate a signature for the message, which is then sent along with it. Then, the message receiver uses the sender's public key to verify that the signature is valid and that the message has not been tampered with. The verification process is done using unique algorithms that allow the receiver to validate the signature without having access to the sender's private key.

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Flowchart and Pseudocode


We will learn about flow charts, pseudocode and programming languages. We will also learn about programming languages and why do we use them. After
this, we will write our program. This will be our flow whenever we will solve any problem. First question, then given values, then approach and at last we will
code it. Bhaiya explains what is a flowchart is a diagramatic approach of that approach known as flow chart. The flow chart constitute various components,
connected with each other Bhaiyan says. He says that from where a program is starting we have a component called terminator. Terminator is used to show
the start and end start of the program. Next block is a simple rectangle, which shows a process. Bhaiya explains how to make a flowchart for the sum of 2
numbers. He says the pseudocode as a whole is a generic way of representing logic. The flow of a flow chart is the same as the flow of the components of
the flow chart. We use parallelogram to show the input/output of the program.



We want to make a flowchart for calculating simple interest This is the formula for simple interest You must have studied it in your school We started our
program from this start block I do n't know p , r , t , so I need to take them as inputs first So I asked user to give me the values for p, r and t So now I have P ,
R and T So I made this rectangular block for the calculation part Here I wrote this formula After finding this answer in the above calculation , I have to print
the output too So here I will print output with this block print SI and then we will end this program We started the program , took a , b as input then we
checked whether a is less than b or not. If a < b print `` YES '' else print `` NO '' and its done Simple You just have to write in english what you are thinking and
it is called pseudocode. If any number has 2 as its factor , then it is even number or ODD number. We have to check a condition that whether N is ODD or
EVEN , so we will make one block for this condition Here is the decision making block , Is N % 2 = 0 ? We will get 2 outputs , YES or NO If output is YES, then it
is an EVEN number , so I printed ODD Else, I will print ODD Then I made this end block and ended this program something like this This is the flowchart for
EVEN , ODD Got it right ? Bhaiya, why are you putting this inverting commas again and again , you will come to know soon.



We have to print something and then increment too You have to Print and then increase the printed number too You can see here , we printed and then
increased the numbe by 1 But we do n't know how to do it How we will increase again and again Let 's rub it You know that we have to start from 1 and print
till 5 So if I give you a number which starts from 1 to 5, will it work ? Your are like , yes , this is what we needed So I took a number =1 This is not a input , it is
a process , so I wrote it inside rectangular block. You have to print all the odd numbers from 1 to N as a part of your homework. The catch is , 1 and N are
inclusive here in the answer should be 15. The solution is easy , you just have to use less than equal to instead of less than. We know that we have to start
with num=1 and increment it till N I know N = 5 , Num =1 , and sum =0 in the beginning. Then I added number in the sum and incremented the number by 1
and then again did the same thing over and over again In the beginning , number is 1 , sum is 0 , then sum is 1 and number is 2 and we kep on doing so , till
number < =5 Now let 's try to solve it. You will get your homework after this. Prime numbers are those numbers which have only 2 factors , 1 and that
number itself.

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