How to implement encryption in js?

Question

JavaScript

Hello.
I need to encrypt/decrypt a number.
For example, this is: 7801703542
The output should be a number of the same length, for example: 004521787
Are there libraries ready for this?

Answer 1

Here is a search for the tag on github - https://github.com/topics/format-preserving-encryp...
If anything, this is Encryption that preserves the
node-fpe format

const fpe = require('node-fpe');
const cipher = fpe({ password: 'secret' });

cipher.encrypt('1234567');
// '4185730'

cipher.decrypt('4185730');
// '1234567'