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Editorial Team
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Asked: 2026-05-31T12:29:21+00:00

I am working on a short URL app, where the token must identify 2

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I am working on a short URL app, where the token must identify 2 values: the link ID and the user ID. Ideally this token should be short.

For example, considering the URL http://sho.rt/15qq6, the token “15qq6” must identify the link and user ID.

I guess one option is to insert both values in a table and use the auto-generated ID as a token, but I would rather not. I would prefer a solution involving encryption.

How could I use the .NET encryption classes for such purpose, if possible? Many thanks for your help.

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1 Answer

  1. Editorial Team

    I’m not clear on how short you want your code. I posted some code online to encrypt any number of query arguments.

    The result could be shortened by base64-encoding the result. That might still not be short enough for you though. (Note that I didn’t base64-encode it because I had some concerns about base64 encoding is case-sensitive.)

    Another approach would be to come up with a code that consists of an ID into your database and some sort of checksum. If the user tries modifying the ID, you could detect this. However, this approach may not be that secure since it might not be that hard to figure out how to create your own checksums.

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