Cyber security for legal
Cyber security calibrated for confidentiality, the SRA and the insurers
Law firms can't afford ambiguity about who has seen what. The SRA expects competent technology, the insurers expect evidence, and clients assume both. Good security in legal tightens email, identity and document handling without making fee-earners' lives harder.
Looking at the bigger picture across IT support, cyber, AI and digital transformation? See the full legal technology overview.
Why it matters
Cyber security in legal is operational, regulatory and commercial all at once
A single misdirected email, a phished partner mailbox or an exposed matter folder can do more damage to a law firm than a quarter of poor billing. The threat profile is concentrated in email and identity, and the consequences run through the SRA and the PII renewal.
Conveyancing firms see the sharper end of the attack pattern - completion fraud, Friday-afternoon BEC, impersonation of clients and partners. Commercial firms see the same shape, slower, with larger numbers attached.
The threat shape
What attacks on legal businesses actually look like
Completion fraud and BEC
Attackers monitor a mailbox, wait for completion week, and intervene with a credible-looking change of bank details.
Partner and client impersonation
Spoofed partner emails to the finance team, or impersonation of clients to fee-earners, around contract signing.
Mailbox compromise with quiet rules
Attackers set up auto-forwards and folder rules and wait. The first sign is often a misdirected payment.
DMS and SharePoint matter sprawl
Broad access, missing ethical walls and dormant external sharing that nobody has audited for years.
Non-negotiables
What effective cyber security for legal looks like in practice
Strong email and identity controls
MFA everywhere, conditional access, anti-impersonation and DMARC enforced rather than left in audit mode.
Matter-centric access and ethical walls
DMS or SharePoint structured around matters, with retention, ethical walls and an audit trail that would hold up.
Off-tenant, immutable Microsoft 365 backup
Mailbox, OneDrive, SharePoint and Teams backed up where a tenant compromise cannot reach them.
Incident response with a legal head on it
A response plan that knows the difference between an IT incident and a notifiable personal data breach, and acts accordingly.
What good looks like
A partner who has secured legal firms before saves you the first 12 months of learning
A legally-aware security partner closes the obvious openings first: weak email controls, broad SharePoint access and unmanaged personal devices. They'll work with the DMS rather than around it, and they'll be able to talk SRA and PII expectations without flinching.
Around lateral hires and team moves they handle joiner-leaver carefully, with ethical walls, mailbox handover and matter access tightened in the same week, not the same quarter.
Outcomes you should expect
- Email and identity tightened without slowing fee-earners
- Matter access and ethical walls enforceable
- Cyber Essentials, SRA and PII renewal evidence current
- A tested response plan for the incidents law firms actually get
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