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AI data leakage 6 min read

Generative AI and confidential financial information

Quarterly figures that go public in twelve days, an acquisition file, a draft opinion. Where generative AI touches that information, why a business account is not the whole answer, and what a firm puts in place.

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Quick answer

Confidential financial information comes in three kinds: inside information about listed clients, figures and conclusions not yet published, and information about mergers and acquisitions. Generative AI touches it at six moments: pasting, uploading a file, memory that carries context into later conversations, connections to email and storage, shared links, and training on a free account. A business account governs what happens to the text after it arrives, not whether the text should have gone in. What a firm puts in place: a decision per tool, the right account type, a list of what never goes in, a marking while typing, and figures on whether the agreement is followed.

01

Inside information, unpublished figures and acquisition files are three kinds of confidentiality, each with its own framework

02

Generative AI touches that information at input, upload, memory, connections, sharing and training

03

The account type governs processing after arrival, not the question of whether the text should have gone in

04

A client name next to an unpublished figure is the combination to remove before you paste

05

A decision per tool only works if it reaches the employee at the moment they open the tool

On a Friday afternoon, an audit manager at a firm with listed clients wants the memo on revenue recognition to read more tightly. She pastes the draft into a chatbot, with the client's name, the quarterly figures and the conclusion that revenue will come in below what the market expects. The figures go public in twelve days.

She has done nothing she was told not to do, because nothing was ever decided about that chatbot in the firm. That is the point. Generative AI touches confidential financial information at six moments, a business account covers only some of them, and the rest is a decision the firm has to make and has to show at the moment someone opens the tab.

What do we mean by confidential financial information?

Three kinds, each with its own framework. The first is inside information: precise, non-public information about a listed company that would be likely to affect the share price if it became known. The European market abuse regulation prohibits passing such information on outside the normal exercise of employment, profession or duties, and requires a record of who has access to it. An accountant auditing the annual figures of a listed client works with inside information until the day of publication.

The second kind is broader: figures and conclusions not yet published at a client that is not listed. Draft annual accounts, an opinion not yet issued, a tax position still under discussion with the tax authority. There is no market abuse framework here, but there is the professional duty of confidentiality and the engagement letter with the client.

The third kind is information about mergers and acquisitions: an information memorandum, a due diligence file, the identity of buyer and seller. That information is fenced off contractually with a non-disclosure agreement, and where a listed party is involved it is inside information on top of all that.

How the rules apply precisely differs per client and per engagement, and that judgement sits with the firm, its compliance officer and, where needed, a lawyer. What holds for all three: the information is confidential because someone else trusts that it will not leave the firm.

Where does generative AI touch that information?

In more places than the text box. The prompt is the best-known moment, but not the only one.

MomentWhat happensWhat it means for the firm
InputThe text goes to the vendor and is processed under its termsClient name, period, figure and conclusion together make the text traceable
File uploadThe whole document goes along, including the pages the question did not needAn attachment contains more than the question asked for
MemoryContext from one conversation can resurface in a later oneLast week's client name turns up next to a different client
ConnectionsThe tool reads along in email, calendar or storageThe reach is no longer what someone pastes, but what the tool may access
Shared linksA conversation gets a public URLWhoever has the link reads the conversation
TrainingOn a personal account, input can improve the model unless switched offThe text becomes part of something the firm no longer controls

Memory is the moment that is counted least. How it works, and why a deleted conversation is not gone straight away, is in how AI memory works and the hidden risks of AI chat logs. Connections are the moment that grows fastest: an assistant allowed to read the mailbox also reads the email with the draft report attached.

Why is the account type not the whole answer?

Because the account type governs what happens to the text after it has arrived. A business or enterprise account excludes input from training by default, comes with a data processing agreement and gives an admin control over memory, sharing and members. That is the minimum condition for client work, and the difference from a free account is set out in free versus business AI accounts.

But the business account does not answer whether the audit manager should have pasted the memo. Inside information stays inside information, even at a vendor with a good agreement. Whether that vendor has thereby become a recipient of inside information, and what that means for the list of who has access, is a question for the compliance officer. The answer depends on the contractual arrangements and the setup, and it is not a question an employee can answer on a Friday afternoon.

That is why a firm needs two layers. The first is the decision per tool: which tool, on which account, for which practice, with which information in and which never. The second is what the employee does before pasting: the client name out, the period vague, the amounts fictional. A question about the wording of a note survives that fine. An acquisition file does not, and then the answer is: not in a general-purpose tool. What has to come out in any case is in what you should and should not share with AI.

What does a firm put in place?

An adviser in the corporate finance practice has a sixty-page information memorandum summarised in a PDF summariser a colleague recommended. Buyer, seller and the asking price are on page two. The tool appeared in no overview, and nobody had decided anything about it. That is not an incident; it is a tool without a decision that is actually being used, and that is exactly the list a firm starts with.

Five agreements do most of the work. A decision per tool, in four states: allowed, limited use with a condition in one sentence, no decision yet, not allowed with an alternative named. For every allowed tool the account type that goes with it, and no client work on a personal account. A concrete list of what never goes in, phrased per practice: in audit the combination of client name and unpublished figure, in corporate finance anything from a live transaction. The decision visible at the moment someone opens the tool, not in a policy document. And figures that show whether the agreement is followed, without anyone having to read what was typed.

BeeSensible supports three of those five. The extension shows which AI tools are opened in the firm, only the domain, with no user id and no content; an admin records the decision per tool and BeeSensible never chooses itself. When someone opens a tool a decision exists for, that decision appears in the browser, with the approved alternative as the first button. And sensitive data such as names, IBANs and citizen service numbers get a marking while someone types, in the tools people already work in. An unpublished quarterly figure is not a data type that detection recognises; for that, the decision per tool and the notice on opening remain the instrument. How the AI tools module records this is shown below.

Search tool, vendor or categoryโ€ฆ
865 tools
ChatGPT๐Ÿ‡บ๐Ÿ‡ธ
HighAllowed
Claude๐Ÿ‡บ๐Ÿ‡ธ
MediumAllowed
DeepSeek๐Ÿ‡จ๐Ÿ‡ณnew
CriticalNot allowed
Perplexity๐Ÿ‡บ๐Ÿ‡ธnew
MediumNo decision yet
Mistral๐Ÿ‡ซ๐Ÿ‡ท
LowNo decision yet
Midjourney๐Ÿ‡บ๐Ÿ‡ธ
MediumNo decision yet

Every tool, scored for risk

865 AI tools, each scored Low to Critical, with nothing pre-approved or pre-blocked until someone decides.

More about AI Tools

For a document that has to go into a tool anyway, it helps to clean it first: redact a PDF before handing it to AI. How the agreements fit together for a firm as a whole is on the page about AI governance for accounting firms, in AI governance for accountants and under the topic AI governance.

Tomorrow the audit manager from the first paragraph takes the client name and the figures out of the memo before she pastes, and the compliance officer puts the chatbot she used on the list with a decision next to it. The first takes a minute; the second is the work that was still to be done.

FAQ

Common questions

May you put a client's unpublished figures into an AI tool?

That is a decision for the firm, not a question with a general answer. If the client is listed, those figures can be inside information, and disclosing them outside the normal exercise of your work is prohibited. For an unlisted client, the professional duty of confidentiality and the engagement letter apply. In both cases the first question sits with the compliance officer: in which tool, on which account, and with what removed.

Is a business AI account with a data processing agreement enough?

It is the minimum condition, not the whole answer. A business account excludes input from training by default and puts the processing under contract. It does not answer whether the employee should have pasted the figure, the client name and the conclusion. The firm answers that question in its decision per tool, and the employee answers it at the moment of typing.

What does AI memory do with confidential information?

In tools with a memory feature, information from one conversation can resurface in a later one, even after the original conversation has been deleted. A client name that sat in a memo in week one can appear in an answer about a different client in week three. On a business account an admin can limit or switch off memory; on a personal account that setting sits with the user.

What do you remove from a text before pasting it into an AI tool?

The combination that makes the text traceable: the client name or the listed company, the period, the specific figure and the conclusion. A question about the wording of a note works with fictional amounts and no name. An acquisition file usually cannot be anonymised without losing its meaning, and then that is the answer: not in a general-purpose tool.

Can a firm show that these agreements are followed?

Partly, and that is more honest than an all-green report. A firm can show which tools have a decision, what share of AI use runs through allowed tools, and how often a notice at a tool without a decision led to the alternative. It cannot show what exactly was in a prompt, and that is as it should be.

Portrait of Rens Timmermans of BeeSensible

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