Enterprise cybersecurity and family cybersecurity have almost nothing in common. An enterprise defends a network, a workforce, and a known inventory of applications. A high-profile family defends the principal's iPhone, the spouse's social media, the kids' gaming accounts, the housekeeper's WhatsApp, and a home office with consumer-grade wifi that the IT contractor set up in 2019.
The threat model is different too. An enterprise attacker wants data or disruption at scale. A family attacker wants this specific family — their money, their schedule, their relationships, their secrets. The economics of targeted attack on a UHNW family make a small team of attackers extremely viable. Generic enterprise controls do not address this.
The threat model in practice
A family threat model has specific actors and specific motivations that are worth naming:
Social engineering targeting staff. The majority of successful attacks on UHNW families begin by compromising household staff, family office employees, or outside advisors. The staff member is socially engineered to wire funds, share credentials, or forward documents. The principal often never interacts with the attacker at all.
Device compromise targeting the principal. Phishing SMS, malicious apps, public wifi compromise. The principal's phone contains calendar, contacts, banking apps, and authentication tokens. Once compromised, most other controls become defeasible.
Physical and digital surveillance. Private investigators hired by litigation adversaries, business competitors, or ex-spouses. Combines OSINT (open-source intelligence) with occasional digital intrusion. The goal is usually intelligence rather than theft.
Extortion and impersonation. Deepfake audio or video of the principal used to authorize transfers. Ransomware targeting the family office. AI-generated voice calls from "the principal" to staff with urgent instructions.
| Attack type | Primary vector | Typical loss | Main defense |
|---|---|---|---|
| Social engineering of staff | Email / phone impersonation | Wire fraud, data exposure | Process controls, callback verification |
| Device compromise | Phishing, malicious apps | Credentials, communications | MDM, hardware keys |
| Surveillance / OSINT | Public data, social media | Privacy, planning intelligence | Digital footprint reduction |
| Deepfake / impersonation | Voice / video manipulation | Wire fraud | Out-of-band verification |
What actually works, in priority order
Security recommendations for families tend to come as fifty-item checklists that nobody implements. The shorter, prioritized list is more useful.
1. Process controls on money movement. No single person can authorize a wire above a defined threshold. Callback verification on a known-good number for any transfer request, no exceptions, no matter how urgent. This alone prevents the majority of catastrophic losses. It also creates the most internal friction, which is why families skip it.
2. Hardware security keys for critical accounts. YubiKeys or equivalent for email, banking, and cloud accounts. Immune to phishing in a way that SMS and app-based 2FA are not. For UHNW families, the investment is trivial and the protection substantial. The principal will resist until it becomes habit.
3. Device management on all family devices. MDM enforcement on phones, tablets, and laptops across the family. Remote wipe capability. Application restrictions. Automatic updates. Consumer devices in default configuration are not adequate for this threat level.
4. Email and communication hygiene. Family office email on enterprise infrastructure with proper DMARC, DKIM, and SPF. Client-side encryption for sensitive communications. Separate communication channels for financial instructions versus general correspondence.
5. Digital footprint reduction. Periodic audits of what is publicly available about family members. Address, travel patterns, schedules, financial holdings. Takedown services for the worst exposures. Social media hygiene for younger family members, which is harder to enforce than it sounds.
6. Vendor and advisor due diligence. Every outside party with access to family information — attorneys, accountants, wealth advisors, travel providers — represents attack surface. Their security posture matters as much as the family's own.
- Wire authorization process with callback verification documented and adopted
- Hardware keys deployed on all principal and family office accounts
- MDM rolled out to all family and staff devices
- Email infrastructure hardened (DMARC, DKIM, SPF, spam filtering)
- Initial digital footprint audit with high-priority takedowns
- Incident response contact list established and tested
Where programs collapse
Two failure modes.
Treating security as an IT problem. The principal's social media, the housekeeper's WhatsApp use, the teenager's gaming accounts — these are not IT problems. They are behavior problems that require ongoing engagement, education, and patience. Firms that scope their family cyber program around technology alone miss the majority of the actual risk surface.
One-time engagements without ongoing operations. A penetration test and a hardening project does not produce a secure state. Without ongoing monitoring, incident response, and periodic re-assessment, the posture degrades within a quarter. Families that buy security as a project rather than as a service are typically back where they started within a year.
Scoping the service
Family cybersecurity has become a legitimate service line for multi-family offices and private banks. Pricing is typically $50K–$250K annually for an active program depending on family size, exposure, and incident response commitments. For UHNW families, the spend is trivial relative to the risk; the real constraint is finding providers who understand the distinct threat model rather than applying enterprise frameworks to family contexts.
Firms building or buying family cyber capability should reference the cybersecurity capability model, which maps the family-specific threat surface against adjacent capabilities like identity management, incident response, and third-party risk — useful for scoping service offerings or evaluating vendors.