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POHow can I encrypt a string in JavaScript and decrypt that string in C#
 

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  1. POHow can I encrypt a string in JavaScript and decrypt that string in C#
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    <p>I've seen this question asked before, though in these cases the poster wanted to encrypt something (usually a url) on a public facing website, and the responses were mostly "don't!". In my case, however, the JavaScript will be stored within a non-public internal system, so I think I have more leeway. One example of a similar question is: <a href="https://stackoverflow.com/questions/4614542/how-to-encrypt-url-in-javascript-and-decrypt-in-c">How to encrypt url in javascript and decrypt in c#</a> - and the answers don't actually answer the question.</p> <p>My 'JavaScript' is actually 'SuiteScript', which is defined as "SuiteScript is a JavaScript-based API that gives developers the ability to extend NetSuite", where NetSuite is a hosted CRM package, so any coding used to encrypt my string would be hidden to everyone, except for employees of my company (so considered safely hidden).</p> <p>What I want to do is:</p> <ol> <li>generate a querystring (e.g. userid=guidValue&amp;firstName=stringValue&amp;company=stringValue&amp;...),</li> <li>encrypt that using a secure method (such as AES256, RSA, whatever someone can suggest that's secure),</li> <li>call a webpage on my C# based website passing this string in the URL (e.g. mysite.com/mypage.aspx?encStr=encryptedString)</li> <li>have that C# page decrypt it, separate the name/value pairs and process them.</li> </ol> <p>I've googled around and search stackoverflow, but not found any articles or answers that provide clear instructions of an encryption method that can be used by both technologies. Does anyone have such instructions?</p>
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    1. COWho are you trying to protect the information from? If it's an internal system, shouldn't everybody be implicitly trusted? If not, then the fact that it's non-public makes absolutely no difference. You can't encrypt at the web browser client without sending it all the code needed to figure out how to spoof the security.
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    2. COIf you do a form post over ssl then you shouldn't need to encrypt the message. Doing explicit encryption for that would be over kill.
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    3. COHTTPS isn't an option, as I don't have control over the hosted NetSuite server. I'm protecting the information from prying eyes when the string is sent to my C# based website, which is not internal. I don't need to send the code needed to figure out security spoofing. I thought that if a 'key' was used in the JavaScript and that same 'key' was available to the C# (without being sent) then decryption could be done
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