[Pas2js] Encrypt - Decrypt between Delphi-Pas2js and reverse process

[Michael Van Canneyt]

On Wed, 21 Oct 2020, taqtaq via Pas2js wrote:

> How can I do to encrypt in delphi / lazarus from server side and then decrypt
> with javascript in the client side? Of course the reverse process too
> Is there a way to do that? I think yes, but I don't know how.

Server-side there are several possibilities, 
I think DCPCrypt may be the easiest:
https://wiki.lazarus.freepascal.org/DCPcrypt

In the browser, You should use the TJSCrypto class. It is documented in

https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto

Michael.