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Random Number Generator

A random number generator is a mathematical device that generates a sequence of random numbers.



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Random Number Generator

A random number generator is a mathematical device that generates a sequence of random numbers.

A random number generator can be hardware-based or software-based. Hardware-based random number generators is typically based on electrical noise sources.

Software-based random number generators can be applied in many ways, including algorithms designed to generate random numbers.

By the end of this post, you should have a good understanding of the different types of random number generators and how they’re used.

What is a random number generator?

A random number generator produces completely random numbers. It is possible to utilize the generated random numbers in situations where impartial randomization is required, such as drawing numbers for a lottery, raffle, or giveaway.

A random number is one that is selected from a pool of numbers that may be fixed or limitless and does not follow any discernible pattern. Most of the time, the pool numbers are independent of one another.

A random number generator is helpful when determining the order of play in games and sports activities, including board games and contests. 

Types of random number generator

There are two main categories that random number generators fall into. The number generators are true random number generators and pseudo-random number generators.

Pseudo-random number generator

A pseudo-random number generator, also known as a PRNG, is an algorithm that, when executed, generates a sequence of numbers with properties that are similar to those of random number sequences. 

Pseudo-random number generators are usually used in most computer-based random number generators. Deterministic algorithms produce pseudo-random numbers.

The series of numbers generally pass statistical tests for distribution and correlation, but they differ from actual random numbers.

The results of a pseudo-random number generator are not random in the truest sense. They depend, instead, on algorithms that imitate the selection of a value to approach actual randomness in their calculations.

This is why when using a pseudo-random number generator, the user will have to specify the distribution from which the random number will be taken. 

Although the values produced by a pseudo random number generator are suitable for usage in most applications, it is not cryptographically secure.

True random number generator

A true random number generator(TRNG, is one that creates its unpredictable results from a source that is separate from a computer and its operating system.

A true random number generator is one that is both cryptographically secure and takes into account real-world events and processes like rolling dice or flipping coins. 

The production of true random numbers is dependent on the occurrence of physical processes and phenomena, such as temperature or thermal conditions. So, to create true random numbers, true random number generators use input from various unexpected occurrences, such as thermal noise. 

A hardware random number generator is another name for a true random number generator. Generating true random numbers also requires methods that account for the possibility of biases being introduced during measuring procedures.

How does a random number generator work?

Typically, random number generators need a seed value to kick off the generation process. This seed value is usually random and often hard to predict.

The first number in the series is then generated using the seed value. With this first number, the generator makes the second, and so on. For a random number generator to be effective, its seed value and output sequence must be completely unpredictable. 

How to use an online random number generator

This random number generator version creates a random integer or decimal based on the data given

  • You must input values in the space provided to use an online random number generator. You have to input all the fields, such as Range. 
  • You will enter or choose the starting number (minimum) in one field. You will then enter or select the number you want to end at (maximum) in a different field. The amount of randomly generated numbers you need is then entered. 
  • After that, click “generate,” and the random number generator will reveal the numbers generated randomly.

Some generators can also provide random numbers based on both integers and decimals

  • The first step is choosing the kind of random number generator you would like to use.
  • Then, you choose or input the lower limit you intend to work within the space provided. After this, you will move to the next field to input the value of the upper limit.
  • After which you input the number of random numbers you wish to generate but note that there is a limit to the amount you can generate per time.
  • You then move to the next step, where you choose the type of result you want, whether an integer or a decimal. 
  • After this, click on “generate,” and the randomly generated numbers will be displayed.

What is a Random Number all about?

The term “random number” refers to a number produced using a vast collection of integers and a mathematical process that ensures each possible distribution has an equal chance of occurring.

Particularly useful in cryptography, random numbers also have many other practical uses, such as in sports activities and games. Random numbers are also applied in various processes, such as encryption, statistical sampling, and many more.


Uses of Random Number Generators


A significant way that random number generators can be used in a security system is during password creation.

Random number generators are hardware devices or computer programs that generate a series of numbers randomly and cannot be predicted accurately. Because of this, they are perfect for use in the creation of strong passwords.


Random Number Generators (RNG) are used to generate random sequences of numbers, which are then applied to decide the winner of a game.

Casinos and blackjack are good examples of such games. Random Number Generators ensure that all players of a game such as roulette have a fair chance of winning and that the cards are dealt fairly. 

Similarly, an RNG is utilized to decide which number the ball will end up landing on while playing the game.

The use of Random Number Generators enables online casinos to provide games that are both fair and random to their patrons. Numerous gambling games also use them to include an element of randomness while preventing players from being able to cheat.


Encryption is the process of scrambling messages so that they may only be deciphered by the person who is supposed to receive them, is one of the essential components in ensuring the confidentiality of communications.

Using random numbers to create the codes that encrypt a message is an essential part of encryption. The type of random number generator used in encryption schemes is a pseudo random number generator. 

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