Jack Dorsey Advocates for Bitcoin Integration in WhatsApp Rival Signal

Jack Dorsey, co-founder of Twitter and CEO of Block Inc., has expressed support for a grassroots campaign urging encrypted messaging app Signal to integrate Bitcoin payments using Cashu, a privacy-preserving eCash protocol. Dorsey's endorsement quickly went viral among Bitcoin supporters. The campaign is not an official partnership, but rather a community-led advocacy effort demonstrating that Bitcoin payments inside Signal are technically feasible.

Jack Dorsey, co-founder of Twitter and CEO of Block Inc., has expressed support for a grassroots campaign urging the encrypted messaging app Signal to integrate Bitcoin payments using Cashu, a privacy-preserving eCash protocol. Dorsey's endorsement quickly went viral among Bitcoin supporters, drawing attention to the feasibility of Bitcoin payments within Signal, according to a TheStreet report.

The campaign, not an official partnership, aims to demonstrate that Bitcoin payments inside Signal are technically feasible. According to the campaign's website, Cashu enables private, peer-to-peer Bitcoin payments using Chaumian blind signatures. This allows users to send Bitcoin with privacy comparable to cash while remaining fully compatible with the Bitcoin ecosystem, the campaign says.

Dorsey has consistently argued that Bitcoin should function as both a store of value and an everyday payment method. His firm, Block Inc., rolled out new merchant tools under its Square division in October 2024, enabling small businesses to accept Bitcoin payments without transaction fees until 2026. Additionally, Dorsey has called for a de minimis tax exemption for everyday Bitcoin transactions, as noted in coverage of the endorsement.

In a separate development, BTQ Technologies has demonstrated a quantum-safe Bitcoin implementation using NIST-standardized post-quantum cryptography. This technology aims to protect the $2.4 trillion Bitcoin market from emerging quantum threats. The demonstration replaces Bitcoin's vulnerable ECDSA signatures with NIST-approved ML-DSA, providing 128-bit post-quantum security, according to a Morningstar release.

The urgency of this development is underscored by the fact that over 6.65 million Bitcoin have permanently exposed public keys, making them vulnerable to quantum attacks. The BTQ Foundation, co-chaired by BTQ Technologies, is coordinating industry-wide efforts to ensure the transition to quantum-safe blockchain infrastructure.