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Cover image for Banana encryption: Decoding Caesar Cipher with Power Automate
Bala Madhusoodhanan
Bala Madhusoodhanan

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Banana encryption: Decoding Caesar Cipher with Power Automate

Intro:
Lets dive on mischievous world of Minions and the ancient art of encryption. Julius Caesar, the original mastermind behind a secret language Caesar cipher. It encrypts letters by shifting them over by a certain number of places in the alphabet. We call the length of shift the key. For example, if the key is 3, then A becomes D, B becomes E, C becomes F, and so on.

Logic:
The process of encrypting messages in Power Automate involves taking the user's input message and a secret key. Initially, the user's message is converted to uppercase, and the length of the secret key is recorded for subsequent steps.

toUpper(triggerBody()['text'])
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To execute the encryption, a scale or array is necessary, containing all the alphabets, spaces, and numbers. A new variable is introduced to iterate through each character of the user's message and offset it based on the key length.

length(triggerBody()['text_1'])
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To facilitate the offset process, the user's message is divided into an array of characters using the Chunk function.

chunk(outputs('UsrInput'),1)
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The offset logic consists of two main steps. First, the index of each character in the user's message is found against the fixed list of characters.

indexof(outputs('Alphastring'),items('Apply_to_each'))
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Subsequently, the lookup is offset by the length of the character

chunk(outputs('Alphastring'),1)[add(outputs('GetIndex'),outputs('Key'))]
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The final step involves appending the variable after each character is successfully offset, completing the encryption process.

Demo:

Encrypt

User Input Key Encrypt Output
"Good Morning " CAT JRRG2PRUQLQJ2
"Good Morning" CAT JRRG2PRUQLQJ
"Good Morning" encrypt NVVK6TVYUPUN

I hope you had a good time learning about encryption and how to use Power Automate for it. Happy coding!

Top comments (3)

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leroyleow profile image
Leroy Leow

Awesome write up on caesar cipher. Will love to give it test run on power automate

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wyattdave profile image
david wyatt

The cool things you can do with power automate 😎

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balagmadhu profile image
Bala Madhusoodhanan

Thank you for inspiring me !!!