1. A method of generating a message intended for display at a computer-implemented client device, the method comprising: receiving, from the client device, a request to perform an operation; in response to receiving the request, executing the operation at a computer-implemented server device to obtain a result; obtaining an alphanumeric message associated with the result; generating an image that contains a visually obfuscated representation of the alphanumeric message, wherein the visually obfuscated representation of the alphanumeric message is human readable and resistant to computer-based reading techniques; and providing the image for rendering at a display element of the client device.