a16z report: Suggests blockchain differentiation to address quantum computing threats

Although quantum computers pose a long-term threat to encryption technologies, the actual risk is widely exaggerated. Reports indicate that the likelihood of "quantum computers related to cryptography" capable of breaking modern encryption systems appearing before 2030 is extremely low.

a16z suggests the immediate deployment of hybrid encryption schemes to counter "harvest now, decrypt later" (HNDL) attacks, but blockchains do not need to rush into adopting post-quantum signature technologies, as digital signatures are not affected by HNDL attacks.

Bitcoin faces unique challenges due to its slow governance mechanism and a large number of potentially abandoned quantum-vulnerable coins, necessitating early planning for migration paths. Privacy chains, on the other hand, urgently require post-quantum protection due to encrypted transaction data.

The report emphasizes that the current implementation of security and vulnerabilities is a more pressing threat than the long-term risks posed by quantum computing and offers seven specific recommendations to help the industry address quantum challenges.