Vitalik: The ideal security rule for multisigs is to change signing keys after each operation
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AT A GLANCE
Vitalik recommended that multisig participants change their keys after each operation and collect signatures off-chain whenever possible, while cautioning against rushed upgrades.
Article
Vitalik: The ideal security rule for multisigs is for every signer to change their key after each operation
PANews October 8 reported that Vitalik posted on the X platform that, for multisignatures, the ideal “secure” practice is for every signer to change their key after each operation. The rule implicitly assumes that ECDSA may become insecure but will not be cracked immediately, so it is still necessary to guard against mempool front-running. Vitalik said that, where conditions permit, signatures should be collected off-chain to minimize the time between “the signature becoming public” and “the key becoming invalid” as much as possible. However, one point must be emphasized: losses of funds caused by improper configuration or rushed upgrades can occur very easily, so do not act hastily.
PANews reported that Vitalik posted on the X platform discussing secure practices for multisignatures.
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Vitalik said that the ideal practice is for every signer to change their key after each operation.
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The rule’s implicit assumption is that ECDSA may become insecure but will not be cracked immediately, so it is still necessary to guard against mempool front-running.
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Vitalik recommended collecting signatures off-chain when conditions permit, in order to minimize the time between “the signature becoming public” and “the key becoming invalid” as much as possible.
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Vitalik cautioned that improper configuration or rushed upgrades can easily lead to losses of funds, and therefore advised against acting hastily.
AI-assisted interpretation
The following is analysis, separate from reported facts. Verify important claims independently.
Multisigs require multiple signers to jointly authorize an operation. Vitalik proposed an ideal security rule: after completing an operation, every signer should change their key; signatures should also be collected off-chain whenever possible to reduce the time between signatures becoming public and the old keys becoming invalid. However, this is a recommended security practice and does not mean that the original text reported a vulnerability or attack that had already occurred.
Why it matters to readers
This view focuses on the risk window after signatures become public during multisig operations, while also emphasizing that key rotation and the upgrade itself may cause losses of funds due to configuration errors.
Beginners should not hastily modify multisig configurations or change keys based solely on this paraphrase; the original text explicitly cautioned that improper configuration or rushed upgrades may lead to losses of funds.
Risks and unknowns
The provided evidence does not include a link to Vitalik’s original X post, so the full context cannot be verified.
ECDSA Whether it will become insecure is presented in the article as a hypothetical, not a confirmed event.
The article does not report any specific vulnerabilities, attacks, affected projects, or amount of financial loss.
Improperly configured key rotation or an overly hasty upgrade could result in financial loss.
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Related concepts
Multisignature
A security mechanism that requires two or more private keys to jointly authorize a single cryptocurrency transaction.
