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Story Beyond the Eye: Glyph Positions Break PDF Text Redaction. (arXiv:2206.02285v1 [cs.CR])
June 7, 2022, 1:20 a.m. | Maxwell Bland, Anushya Iyer, Kirill Levchenko
cs.CR updates on arXiv.org arxiv.org
In the past redaction involved the use of black or white markers or paper
cut-outs to obscure content on physical paper. Today many redactions take place
on digital PDF documents and redaction is often performed by software tools.
Typical redaction tools remove text from PDF documents and draw a black or
white rectangle in its place, mimicking a physical redaction. This practice is
thought to be secure when the redacted text is removed and cannot be
"copy-pasted" from the PDF …
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