Hide text in images and sounds with sendgrid parse webhook
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#Steganography with SendGrid Parse Webhook

This hack lets you encode the body of your email in the attachment. It requires steghide to be installed on your server.

How it works

Using the SendGrid Parse Webhook, we can write code that gets attachments and parts of the email. In this case I take the body and encode it into the attachment using a unix program called Steghide. It uses a concept of security called Steganography. If you attached a .JPG file, it will modify the pixels to store its data. Otherwise if you attached a .wav file, it will convert the text into audio samples and embed that into your file. Its really cool way of hiding information in plain sight.

Get Set Up

  • Install the SendGrid Go Library
  • Install StegHide on your server