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I wonder whether NSA uses syntactic watermarking[1], imperceptible changes to word order or sentence form, keyed to the user accessing a document. This, or othe
by cproctor 9y ago
I wonder whether NSA uses syntactic watermarking[1], imperceptible changes to word order or sentence form, keyed to the user accessing a document. This, or other techniques of embedding a fingerprint in the text itself, would allow a leaker to be identified from just a transcription of the document.
What is the right amount of fuzzing for a news organization to perform on leaked documents, to protect a source while providing credible evidence to support a claim?
Meral, H. M., Sevinc, E., Ünkar, E., Sankur, B., Özsoy, A. S., & Güngör, T. (2007, February). Syntactic tools for text watermarking. In Electronic Imaging 2007 (pp. 65050X-65050X). International Society for Optics and Photonics.
- wyldfire 9y ago> What is the right amount of fuzzing for a news organization to perform on leaked documents, to protect a source while providing credible evidence to support a claim? Maybe paraphrasing the key points or claims of the document would be the only safe way.
- DGAP 9y agoThat seems entirely possible, although considering the scanned classified report also contained printer watermarking that identified the printer serial number, it also seems unnecessary.
- cylinder 9y agoHow would changes to word order or sentence form be imperceptible?
- matt4077 9y ago"Imperceptible without comparing to other versions of the same document"
- microwavecamera 9y agoConsidering the NSA is an intelligence agency, arbitrarily changing info in intel documents could have serious potential repercussions. I'm thinking they wouldn't unless it was part of a counter-intelligence operation.