Polylog
The Polylog Crypto Intelligence Brief

Morning Edition · Monday, July 20, 2026

Zcash Ships Its First Client Built for Payment-Scale Private Transactions

Crypto

Zcash Ships Its First Client Built for Payment-Scale Private Transactions

The Zakura node targets 50,000 shielded transactions per second, and a July 28 hard fork will seal the older Orchard pool to contain a counterfeiting bug.

3 sources
Researchers Publish a Bitcoin Recovery Tool for the Quantum Era, With One Large Exception

Crypto

Researchers Publish a Bitcoin Recovery Tool for the Quantum Era, With One Large Exception

Project Eleven says its proof lets a wallet's own key-derivation path serve as proof of ownership after quantum machines can forge signatures, running in 243 milliseconds on a laptop.

1 source
Michael Saylor Opposes Bitcoin Proposal to Block Arbitrary Data From Blocks

Crypto

Michael Saylor Opposes Bitcoin Proposal to Block Arbitrary Data From Blocks

The Strategy chairman argues that BIP-110, which would temporarily filter non-monetary data, would undermine Bitcoin's neutrality and set a censorship precedent.

1 source
Bridge Exploit Drains Roughly $1.65 Million From Allbridge as Weekly Losses Accumulate

Crypto

Bridge Exploit Drains Roughly $1.65 Million From Allbridge as Weekly Losses Accumulate

The attacker moved stolen funds from Solana to Ethereum, and separate proof-of-concept disclosures put additional six-figure losses on BNB Chain.

3 sources
MetaMask Maker Halted Releases After a North Korea-Linked Contractor Had Code Access

Crypto

MetaMask Maker Halted Releases After a North Korea-Linked Contractor Had Code Access

Consensys says it found no compromised assets or malicious code, as a separate case shows crypto-stealing malware hidden in eight Steam games.

2 sources
Corroborated
The Stablecoin Law Turns One With Its Rules Still Unwritten

Crypto

The Stablecoin Law Turns One With Its Rules Still Unwritten

A year after the GENIUS Act became law, US regulators have missed deadlines to draft rules, and Tether's USDT faces a two-year window to meet them or lose US platform access.

2 sources
Brent Crude Tops $90 as US-Iran Strikes Disrupt Hormuz Shipping

Geopolitics

Brent Crude Tops $90 as US-Iran Strikes Disrupt Hormuz Shipping

Large-cap crypto has reacted only mildly to the energy shock, while a separate breakdown in the bond-stock hedge is pulling Bitcoin lower alongside equities.

2 sources
Plausible
Privacy Builders Split Over Who Should Control the Confidentiality Switch

Crypto

Privacy Builders Split Over Who Should Control the Confidentiality Switch

Aztec details the anatomy of a private transaction as Miden pitches a guardian model, framing a debate over whether users or issuers hold the off switch.

3 sources
France Orders Internet Providers to Block Polymarket

Crypto

France Orders Internet Providers to Block Polymarket

The regulator cited addictive mechanics, missing self-exclusion tools, and a high volume of French users bypassing earlier restrictions.

1 source
Corroborated
Grayscale Plans Quarterly Cash Payouts, Pitting Ethereum Staking Against Solana

Markets

Grayscale Plans Quarterly Cash Payouts, Pitting Ethereum Staking Against Solana

Proposed trust changes would mandate at least quarterly cash distributions from staking rewards without fixing the payout amount or yield.

1 source
A Japanese Logistics Firm Will Pay 2,300 Partners in a Yen Stablecoin

Crypto

A Japanese Logistics Firm Will Pay 2,300 Partners in a Yen Stablecoin

AZ-COM Maruwa plans to invest about ¥1 billion in JPYC as Circle's president defends USDC against mounting stablecoin competition.

2 sources
South Korea Moves to Sanction Upbit's Operator Over 2025 Hack

Crypto

South Korea Moves to Sanction Upbit's Operator Over 2025 Hack

The Financial Supervisory Service has opened proceedings against Dunamu, though legal gaps leave the possible penalties unclear.

1 source
Corroborated