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Ledger CTO Analyzes Post-Quantum Cryptography Migration, Blockchain Favors Hash-Based Signature Schemes

Ledger Chief Technology Officer Charles Guillemet pointed out that the development of post-quantum cryptography has entered a critical stage. Although the timeline for a practical quantum computer remains unclear, a full-scale migration of the encryption systems across the industry is an inevitable trend. Led by NIST, the traditional sector plans to phase out high-risk algorithms by 2030 and completely ban them by 2035, with government and enterprise institutions expected to complete their migration layouts by 2029. Encryption and key exchange will adopt ML-KEM to defend against quantum decryption attacks on harvested data, with digital signatures becoming the core of blockchain transformation. The traditional industry prefers ML-DSA hybrid schemes, while the blockchain sector favors the more secure and robust SLH-DSA hash-based signature. Both schemes have their respective advantages and disadvantages. The compatibility challenges of post-quantum algorithms with MPC and threshold signatures remain a key risk that the industry urgently needs to address.

France Has Recorded 41 Kidnapping Cases Targeting Cryptocurrency Holders This Year

Odaily News France has become a hotspot for wrench attacks, with at least 41 cryptocurrency-related kidnappings and home invasions reported this year, averaging one incident every 2.5 days. Jean-Didier Berger, the Deputy Minister of the Interior, stated that a series of new measures are being prepared with Interior Minister Laurent Nuñez to address this issue.A wrench attack refers to the use of physical violence to force victims to transfer crypto assets. Data from Certik and Jameson Lopp shows that globally, there were 72 verified cases of physical coercion in 2025, a 75% year-on-year increase, with cases involving physical assaults rising by 250%. Ledger co-founder David Balland was kidnapped in France in January 2025. Security researchers point out that attackers are shifting from targeting wallets to hunting individuals, using social media and leaked data to identify targets. Due to the irreversible nature of crypto transactions, attackers often convert illicit proceeds into stablecoins and transfer them across chains to evade tracking. Experts recommend using tools such as multi-signature wallets, withdrawal delays, and spending limits to reduce the risk of attack.

US Musician Loses 5.9 BTC Due to Fake Ledger Wallet

According to The Block, U.S. musician Garrett Dutton (stage name G. Love) lost 5.9 BTC—worth approximately $420,000—after downloading and using a counterfeit Ledger wallet app from the App Store and entering his recovery phrase. On-chain analyst ZachXBT discovered that the attacker laundered the stolen Bitcoin via the KuCoin platform. This incident once again exposes the security risks posed by fake wallet apps, reminding users to exercise heightened caution when downloading and using cryptocurrency-related applications, and to avoid entering sensitive information through unofficial channels.