Abstract: Provided is a process, including: receiving a screen capture event from an operating system of a first client computing device of a first user, the screen capture event including, or being associated with, a bitmap image of at least part of a display of the first computing device; causing optical character recognition (OCRing) of text in the bitmap image; classifying each of the n-grams into two or more categories, the two or more categories including a category for confidential information; and for each of the n-grams classified in the category for confidential information, obfuscating the respective n-gram in the bitmap image to form a modified version of the bitmap image.