Sigil Mother Device Management

Manage child signing disk lifecycles for MPC threshold signatures via CLI.

Updated Jan 17, 2026

Search Tags:#security #blockchain #cryptography #signing #mpc #key management

Ready to run

npx skills add https://github.com/chippr-robotics/sigil --skill sigil-mother-device-management

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Sigil Mother Device Management
Source: https://github.com/chippr-robotics/sigil/tree/main/.claude/skills/sigil-mother
Command: npx skills add https://github.com/chippr-robotics/sigil --skill sigil-mother-device-management

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a secure, air-gapped method for managing critical key material and child signing disks for multi-party computation (MPC) signing operations, ensuring that no single party can sign transactions alone.

Core Features & Use Cases

Secure Key Initialization: Safely initialize an encrypted USB drive to act as the mother device, generating master keys.
Child Disk Lifecycle Management: Create, reconcile, refill, and nullify child signing disks (floppy disks) which hold presignature shares.
Use Case: A financial institution needs to sign blockchain transactions using MPC. This Skill allows them to securely generate and manage the cold shards (on floppy disks) and the agent shards, ensuring that transactions can only be signed when both physical and agent components are present and validated.

Quick Start

Use the sigil-mother skill to initialize a new encrypted USB drive for mother device storage.

Frequently Asked Questions about Sigil Mother Device Management

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I manage MPC signing disks for threshold signatures?▼

Managing MPC signing disks involves using an air-gapped mother device to handle the lifecycle of child disks, including secure initialization, creation with presignatures, reconciliation, refilling, and nullification of compromised disks.

What is an air-gapped mother device for MPC key management?▼

An air-gapped mother device for MPC key management is an encrypted USB drive that securely generates and holds master keys, ensuring no single party can sign blockchain transactions alone without physical and agent component validation.

How do I securely initialize encrypted storage for blockchain signing operations?▼

Securely initializing encrypted storage for blockchain signing requires an air-gapped USB drive to act as the mother device, generating master keys to safely manage critical key material and child signing disks for multi-party computation.

Can I permanently nullify compromised child disks in a threshold signature scheme?▼

Yes, you can permanently nullify compromised or retired child disks in a threshold signature scheme by executing specific command-line subcommands designed to invalidate floppy disks holding presignature shares.

Does multi-party computation key management work for financial institution blockchain transactions?▼

Multi-party computation key management works for financial institution blockchain transactions by securely generating and managing cold shards on floppy disks and agent shards, ensuring transactions are only signed when both physical and agent components are validated.

How do I refill presignatures on child signing disks?▼

Refilling presignatures on child signing disks is handled via a specific command-line subcommand that replenishes the presignature shares stored on floppy disks managed by the air-gapped mother device.