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[PremiumCodeX]

The problem is JavaScript using in the Web browser. If you do not use Java, then you can not use notepad. For security reasons it is much better not to use Java. 

I advise us not to confuse JavaScript with Java, though. Java was removed from browsers a very long time ago while JavaScript is still widely used in stable projects. Unless you know what you are doing, disabling JavaScript is advised, but the nature of the JavaScript that web sites use is that the script runs on client side so it is possible to white-box analyze it in a secure environment and if you find it safe, you may enable JavaScript for that site. Using JavaScript is not a Devil's tool nowadays!

[Patatas]

The problem is JavaScript using in the Web browser. If you do not use Java, then you can not use notepad. For security reasons it is much better not to use Java. 

I advise us not to confuse JavaScript with Java, though. Java was removed from browsers a very long time ago while JavaScript is still widely used in stable projects. Unless you know what you are doing, disabling JavaScript is advised, but the nature of the JavaScript that web sites use is that the script runs on client side so it is possible to white-box analyze it in a secure environment and if you find it safe, you may enable JavaScript for that site. Using JavaScript is not a Devil's tool nowadays!

It could still be used as a lethal tool to spoof or manipulate anything you want.For example,you might have played google's offline game when your Internet goes down.By running a simple script in the browser,you can hack that game to score unlimited points.That's where the client side javascript is use for devil stuff.This is just an example of what you can with the script on the client side.I believe,the complications or encrypting the data should be left to the back-end only.

[Patatas]

If encryption were done server-side, then I (website owner) would be able to read the contents of every notepad, which would defeat the whole purpose.  You don't own your bitcoin unless you control the private keys, and your data is not private unless you encrypt it.

You got a point but the encryption takes place on the server side ,isn't it ? I upload my content,use one of the algorithms that "YOU" have implemented on the website to store the encrypted data.Now,since you have implemented the code,only you would know if it actually looks like what it is or data is being available at the back-end.