Custody describes the control structure around cryptographic signing authority and recovery.
Self-custody concentrates responsibility
The user controls keys or recovery material directly. This provides autonomy while making backup, device security and succession planning central responsibilities.
Service custody delegates operations
A service maintains control systems and account access processes. Readers should understand legal terms, segregation, withdrawal operations and incident procedures.
Shared control distributes authority
Multisignature and multiparty systems can require several approvals. Their strength depends on participant independence, recovery design and clear operating rules.