The Internal Revenue Service (IRS) is laying the groundwork for a possible assault on privacy-enhancing cryptocurrency technologies.

• IRS-CI Cyber Crimes Unit challenged its “industry partners” to explain where the crypto tracing community stands on privacy coins, Layer 2 protocols, sidechains and the Schnorr signature algorithm in a June 30 Request for Information (RFI), as first reported by The Block.
• “There are few investigative resources for tracing transactions” that move across these privacy-enhancing vectors, the IRS said, noting a recent spike in illicit privacy coin use. “The CI Cyber Crimes program is working to get in front of this trend.”
• The IRS singled out the monero, zcash, dash, grin, komodo, verge and horizen privacy coins, sidechains Plasma and OmiseGo, and Layer 2 protocol networks Lightning, Raiden and Celer.
• What’s good for user privacy is bad for investigative efficacy: The IRS bemoaned the Bitcoin blockchain’s apparent plans to integrate Schnorr signatures, writing that such a move will undercut IRS agents’ current tracing techniques. 
• The tax agency seeks estimates of how much it would cost to “support this initiative” as well as return on investment estimates.