"That was a barium trace to catch leakers": poster reveals bait operation
McDonaghMatthew · x · 2026-10-16
Matthew McDonagh revealed that his earlier post was a barium trace — the classic infosec trick of seeding unique watermarked bait to identify a leaker — closing with "Thank you for playing."
The post doesn't specify what was leaked or who got caught, but the reversal itself makes for a public leak-tracing finale.
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