Part of the CustodyStress archive of observed Bitcoin custody incidents
CS-01268
Owner death — hardware wallet 2024
BlockedCase description
An estate case described by a digital asset attorney in early 2024 involved a holder who had used a brain wallet—a private key derived deterministically from a memorised passphrase. The holder had never written down or stored any key material, believing their memorised passphrase was sufficient. On death, the estate had no path to recovery. A blockchain explorer showed a substantial balance on the corresponding address. Brain wallets were strongly discouraged by the security community because of their vulnerability to dictionary attacks, but this case illustrated a different failure mode: no one other than the holder ever had any key material at all.
Custody context
| Stress condition | Owner death |
| Custody system | Hardware wallet (single key) |
| Outcome | Blocked |
| Documentation | Unknown |
| Year observed | 2024 |
| Country | International |
Structural dependencies observed
What this illustrates
There was only one way in. When that path was gone, so was access. Access was not recoverable.
Outcome interpretation
Access was not possible under the reported conditions.
Source
Privately Reported
Evidence type
News article
Related cases involving owner death
119 cases involve owner death
274 cases involve hardware wallet (single key)
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This archive documents observed custody survivability failures. It does not attempt to document all Bitcoin losses or security incidents.
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Framework references
Where Bitcoin Custody Intersects Legal and Fiduciary Authority
Where custody creates gaps in estate planning, fiduciary duty, and professional responsibility.
Professional Scope Boundary Matrix
What each professional or product covers, what they do not, and where gaps form between them.
The Independent Assessment Layer in Bitcoin Custody
How independent diagnostic layers emerge when multiple parties depend on shared infrastructure.