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Olex describes a protocol for sending silent payments from MuSig2- or FROST-based wallets without reconstructing the shared secret on one device. His construction is intended to remain byte-for-byte compatible with BIP352 interfaces, but its security paper is still under review and lacks a reduction to the discrete-log assumption.
Christopher Allen traced hardware-wallet risks to weak randomness, rushed security reviews and single points of failure. He recommends heterogeneous multisig setups using tools such as MuSig or FROST, and said Blockchain Commons published a 2022 study with practical multisig safety guidance.
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