This Intercept article is from December 2022 but has all the hallmarks of what Musk and DOGE are now perpetrating within our federal government agencies, using OPM, GSA and Treasury’s massive databases of fiscal,  financial data and PII, on all Americans.

…To begin with, a wide array of document watermarking measures can identify the source of a leak. That’s why leakers and publishers need to figure out whether a given document is unique and whether it is safe to publish the document itself — or maybe, in the interest of protecting the source, not publish or even write about the document at all.nThe notion of uniquely fingerprinting or watermarking each version of a digital text using various spacing modifications is not particularly new. It has been discussed since at least the early 1990s, with research building on general fingerprinting literature from the early 1980s. Ironically, one of the original proposed applications of document watermarking was to protect newspaper and magazine articles from unauthorized distribution. Every spatial element of a document — including the spacing between characters, words, sentences, and paragraphs — can be modified in every version to form a unique signature that identifies the recipient of that particular document. For instance, a version of a document sent to one person could have slight variations in the distance between certain characters, words, sentences, or paragraphs that uniquely differentiate the document from a version sent to another person with ever-so-slightly different spacings…”