Deepfakes and the New Enterprise Trust Problem

 Isharth Kumar
Isharth Kumar
(Intern) Policy & Advocacy, CyberPeace
PUBLISHED ON
Oct 25, 2026
10

Introduction

The traditional logic of workplace security is built on the baseline assumption that an employee would be able to identify a suspicious request by form and/or sound. The rollout of AI-generated voice and video is steadily dismantling this assumption. The authenticated voice of a familiar executive or the face of a colleague in a video meeting is no longer a guarantee of variety. This paper reviews recent survey evidence of deepfake-enabled social engineering, briefly considers the Arup fraud as a case study and reviews Gartner's and United States government agency guidance. It argues that organisations should stop relying on employees to spot fakes and instead build independent verification, limited authority and escalation into the everyday workflows that move money and grant access, long before a convincing fake can do damage.

The Scale of the Threat

Gartner revealed in September 2026 that the survey (of 297 senior cybersecurity leaders, March to May 2026) found 41% had been subject to at least one deepfake social engineering attack during an audio employee call in the last 12 months; 36% of deepfake social engineering attacks happened on a video call with an employee in the last 12 months. Gartner concluded that AI makes social engineering more prolific, personalised and believable, while it makes common detection signals less dependable.

The survey also highlights the continued use of older methods. 79% of respondents reported at least one email phishing, spear-phishing, or business email compromise incident, and 58% vishing or smishing. Deepfakes are not replacing tried-and-true techniques but supplementing them. Craig Porter, a director analyst at Gartner, said, "Attackers can combine phishing, business email compromise, synthetic media and the aggregation of personal context across multiple channels, yet most attacks still rely on compromised credentials, simple account takeover and poor recovery processes."

Why it matters: Ability to receive requests can now be routed through the same communication systems that high-trust messages go through. With information gathered from the web, as well as synthetic voice and video, fraudsters can impersonate executives, vendors, suppliers, colleagues, or customers.

Why Spotting the Fake Is Not Enough

The 2024 attack on Arup is an example of this. A finance staff member in an engineering firm in Hong Kong took part in a video conference in which he thought he was speaking to the firm's CFO and others, but all participants were deepfakes. The employee initially suspected a phishing email, but he put aside his doubts after the video call because the participants looked and sounded like colleagues he recognised. He then approved 15 payments of a total HK$200m (US$25.6m). Arup confirmed the voices and faces were fake, though its internal cybersecurity was not breached, and its global CIO, Rob Greig, said attacks of this kind had increased substantially in recent months. The firm's East Asia chairman said staff were warned of increasing attacks of this kind around the world.

This case is instructive because the control that failed was human judgement with a plausible performance. The employee's first reaction was right; it was a video call that overruled this. Detection by the request recipient was the only control.

Government guidance points the same way. A joint information sheet from the NSA, FBI and CISA warns that the most substantial synthetic media threats include impersonating leaders and financial officers and using fraudulent communications to gain access to networks and sensitive information. It advises organisations to have a response plan and to consider technologies that detect deepfakes and establish the provenance of media. Detection tools have a place, but they are one layer, not a foundation.

Building Verification into Workflows

Achyuth Krishna, Head of IT, Information Security and Procurement at Whatfix, says that the real question is no longer 'Can the employee tell that the message is generated by AI?' But whether your organisation has designed its workflow so that a single deceptive interaction cannot become a security incident. "Trust itself has now become a new attack surface," he says.

Gartner's suggested mitigations echo this sentiment. "Porter recommends that CISOs evaluate AI-led social engineering risks with the same level of scrutiny as identity and access risks," the analyst firm said. Among the suggestions that the firm made to organisations that want to defend against AI-led social engineering attempts include establishing secure verification as standard operating procedure for any important request, by whatever means they are communicated, by email, voice, video, collaboration platform or AI system, and using trusted channels of verification as well as stronger authentication for account recovery, privileged access, and payment approval. In terms of design, this suggests a few principles:

1. Before deciding to authorise payments, change privileged access or disclose information, make sure that you get independent confirmation from a different source.

2. This should apply to everyone, including requests that appear to come from a known senior executive, so that employees never need to challenge authority personally.

3. Clearly outline situations where your team needs to stop, confirm, and escalate.

4. Test these procedures in scenarios that are as close to reality as possible rather than just training on an annual basis.

In this case, a simple video call would not have been enough to trigger the release of the money. Validation would have taken place outside the attacker's communication channel.

Extending Identity to AI Agents

As companies open up apps and business data to software agents, Krishna says those agents need their own identities, limited rights, and audit logs. Gartner has also identified that compromised AI apps, prompt injection, and agents acting outside of their bounds are threats that security teams will need to handle.

The logic is the same as in the human case. An agent, given virtually unlimited power, can be misused in exactly the same way that a human employee can be. Seen as identities to be verified, constrained and observed rather than as trusted, remoting extensions of their original creators, agents preserve the principle of limited authority.

Conclusion

Deepfakes have made impersonation cheap, personal and persuasive, and many organisations have already been hit. Detection will remain useful, but it cannot carry the burden alone. The stronger response is structural: independent verification for consequential requests, narrow permissions for people and agents, and regular testing of escalation procedures. The aim is to ensure that no single call, message or agent holds enough unchecked authority to turn a successful deception into a financial loss or a data breach.

Sources

  1. Tech Observer: Deepfakes are turning trust into a new enterprise security risk
  2. Gartner: Survey Finds 41% of CISOs Reported At Least One Social Engineering Incident Involving a Deepfake in the Past 12 Months
  3. Help Net Security: The latest deepfake numbers give CISOs plenty to worry about
  4. NSA: NSA, U.S. Federal Agencies Advise on Deepfake Threats
  5. CNN: British engineering giant Arup revealed as $25 million deepfake scam victim (syndicated copy)

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PUBLISHED ON
Oct 25, 2026
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