Steel Backup Specialized for Bitcoin Multisig Wallets
Self-contained: Recover with Minimum of Shares.
QR Codes for Easy Recovery and Air Gapped Signing.
Works with all signers and hardware wallets.
Self-contained Multisig Backups
SeedHammer eliminates the need for storing a descriptor.
Without the public keys for all the seeds in a multisig wallet, you can't recover the wallet.
Other backup solutions require a separate digital or printed copy of the wallet.
Recover With Minimum of Shares
The minimum amount of shares is enough to recover a multisig wallet backed up with SeedHammer.
- Withstand damage or loss of all shares beyond the quorum.
- Any combination of M-of-N plates contain enough data for a full recovery.
- Fast and convenient recovery with QR codes.
No Need to Backup Wallet Descriptor
The descriptor is split into parts which are distributed among the plates in a way so any quorum can recover the wallet.
- Perform complete recovery with the minimum number of plates.
- No need to separately store the descriptor online, offline or alongside each physical plate.
- Complies with multisig standards, no special tools needed for recovery.
the other side contains a part of the descriptor.
Built for The Security Conscious
The controller software is open source and runs on the same air gapped hardware as SeedSigner.
The electric hammer is a modified off-the-shelf machine. It is stateless and contains no radio capabilities (wifi, bluetooth, etc.).
The singlesig and multisig backups are easily verifiable.
Read more in our article on attack vectors.
See More On Twitter
twitter.com/SeedHammer
Some do! pic.twitter.com/xj7tDjivzh
— Erik (@brikk_) July 2, 2023
Sovereignty or nah? @SeedSigner @start9labs @SeedHammer pic.twitter.com/2Mxw9sa5pC
— ericjaffe (@ericjaffe) July 1, 2023
@SeedHammer @SeedSigner guess what arrived today? Now need to fond time to set it up and knock a few tests out. pic.twitter.com/XiCivvXUyB
— MoparMiningLLC (@MoparMining) May 1, 2023
On stage demonstrating @SeedHammer @seedor_io and @SeedSigner at @BitcoinAlive pic.twitter.com/L08xJjHs4H
— mineracks (@mineracks) April 15, 2023