Seed phrase unavailable — software wallet 2020

Survives

Case description

A Bitcoin user who had used a Shamir's Secret Sharing scheme to protect their seed found in May 2020 that the open-source tool they had used had been abandoned and was incompatible with any current implementation. Two of three shares survived but the tool required to combine them no longer ran on modern operating systems.

Custody context

Stress condition	Seed phrase unavailable
Custody system	Mobile or software wallet
Outcome	Survives
Documentation	Unknown
Year observed	2020
Country	Unknown

Structural dependencies observed

Third-party platform dependency

Outcome interpretation

Access remained possible under the reported conditions.

Source

Publicly Reported

Evidence type

Forum post

Evidence link

https://bitcointalk.org/index.php?topic=255793.0

Related cases involving seed phrase unavailable

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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.