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First things first: Don't roll your own crypto. As for your current approach: This is basically a vigenere cipher which is inherently broken, provides not integrity protection and wouldn't even encrypt known / predictable bit positions (where the ASCII code is constant zero or one). As for an improved version: Use a well-known encryption algorithm (e.g. ...


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I'm unsure about the proper steps to store the e-mail password on the user's computer. There are two ways I would recommend (in tandem if possible). First, some SMTP servers (like Google) allow you to create an Application Password. This password has limited access (for instance just for email) and can't be used to change the users password. ...



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