How Random Is Powershell Get Random

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As a PowerShell enthusiast, I’ve often found myself curious about the inner workings of the Get-Random cmdlet. At first glance, it seems like a straightforward tool for generating random numbers, but the more I delved into it, the more I realized there’s a lot more happening behind the scenes.

Understanding Get-Random

The Get-Random cmdlet in PowerShell is used to generate random numbers. It’s a simple yet powerful tool that can be incredibly useful in various scripting scenarios. By default, it generates a random integer between 0 (inclusive) and 1 (exclusive). However, we can specify the range or the count of numbers to be generated using parameters.

Seed Value

One interesting aspect of Get-Random is the seed value. If we don’t specify a seed value, PowerShell uses the system’s current date and time as the default seed. This means that if you run the cmdlet multiple times within the same second, you’ll get the same “random” number. To address this, we can specify a seed value to ensure that the randomization is truly unpredictable.

Cryptographically Secure Random Numbers

In security-sensitive scenarios, we might need random numbers that are cryptographically secure. Thankfully, PowerShell provides the -InputObject parameter that allows us to input an array of bytes from a cryptographically secure random number generator.

Use Case: Simulating Dice Rolls

Let’s add some personal flair to this discussion. As a tabletop gamer, I often find myself needing to simulate dice rolls for various role-playing games. With Get-Random, I can easily simulate the roll of a 6-sided die by specifying the range from 1 to 7.

Exploring the Limitations

While Get-Random is a valuable tool, it’s essential to be aware of its limitations. In certain scenarios, such as Monte Carlo simulations or cryptographic key generation, a more sophisticated random number generator might be necessary.


Digging into the mechanics of Get-Random has been an enlightening journey. While it’s a convenient tool for many tasks, understanding its underlying mechanisms allows us to use it more effectively and confidently in our PowerShell scripts.