What cloud DLP covers
Cloud DLP applies the core principles of data loss prevention, namely content discovery, monitoring, and policy enforcement, to data that lives in cloud services or moves through them. That covers file storage and sync platforms, collaboration suites, and file sharing services.
The risk runs in two directions. Sensitive data can be uploaded into cloud services, especially from personal or unsanctioned accounts. Data already stored in the cloud can also be overshared or exposed, for example, through a public link.
Three integration points
Cloud channels are covered at three integration points, and each one sees the data in a different state. Closest to the user, endpoint DLP works on the device itself.
| Integration point | What it inspects | Example |
|---|---|---|
| API-based | Files stored in cloud platforms (data at rest) | Card numbers in a spreadsheet |
| Inline inspection | Traffic to the cloud through a gateway (data in transit) | Uploads checked before they leave the organization |
| Endpoint agents | Transfers on the device, at the source | A transfer from a laptop on home Wi-Fi |
How a blocked upload is handled
Detection in all three cases relies on content analysis: keyword dictionaries and thesauri, pattern matching for identifiers, exact-file matching by hash, document fingerprints, and classification labels. Every rule that fires follows the same path:
- 1
Detect
Content analysis matches the file to a rule before the transfer completes.
- 2
Decide
The policy chooses to block, quarantine, log, or alert.
- 3
Notify
The user sees a message explaining why the transfer did not go through.
- 4
Record
The event is saved with the user, the service, the content classification, and the action taken.
Why cloud use needs dedicated controls
Cloud use creates four kinds of exposure, and each one needs its own control. Shadow IT is the one teams most often underestimate, because personal accounts sit outside every corporate system.
| Risk | What it means |
|---|---|
| Shadow IT | Staff move work data through personal accounts that network monitoring cannot see |
| Shared responsibility | The provider secures the infrastructure. File content remains the customer's responsibility. |
| Sprawl | Copies across drives, shared workspaces, and backups widen exposure |
| Third-party apps | OAuth-connected apps can read corporate cloud data with no file transfer |
Typical scenarios
Three situations show how the controls work in practice:
- An engineer uploads a customer database to a personal cloud storage account. Content inspection blocks the upload before it completes.
- A confidential contract sits on a corporate drive behind a public “anyone with the link” setting. A scan of data at rest finds it.
- A departing employee bulk-syncs project folders to an external cloud drive. The transfer is flagged as data exfiltration.
What it looks like in Anexet
Access, audit, and shadow copy are set separately for each cloud service in the agent profile. The list of web versions under interception is configured on its own tab.
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Where to start
Start with the data whose leak would do the most harm, then move to the cloud services your staff actually use. Rules written for every service at once end up blocking ordinary work and get switched off. It is better to begin cloud upload control on a few channels than on all of them at once.
If the policy must cover sensitive data, an on-premise deployment keeps the rules, captured content, and logs inside the company's own infrastructure.
Further reading: DLP Systems — what it is and how it works; How to buy the DLP system?.
Cloud data rarely leaves in one move. It leaves through a series of ordinary uploads, and each one looks harmless.
Anexet TeamHow Anexet handles this
Anexet covers cloud channels through its endpoint agents and ICAP integration, extending the same content-aware policies that govern email, web, and removable media to cloud storage and file-sharing services.
Because Anexet is deployed on-premise, detection rules, captured content, and audit logs are processed and stored within the organization's own infrastructure. Sensitive data is not handed to an external DLP vendor for analysis.
Cloud storage coverage
monitoring and control of transfers to and from Box, Dropbox, Google Drive, OneDrive, SharePoint, MEGA, ownCloud, Nextcloud, WeTransfer, and Amazon S3.
Endpoint agents as the primary control point
agents on monitored workstations inspect cloud uploads at the source, including transfers that bypass the corporate network entirely.
Content-based detection
the same classification engine, security thesauri, hash banks, digital fingerprints, and sensitivity labels. Decisions depend on what a file contains, not only on the service it is sent to.
Enforcement and audit trail
policies can block a transfer, quarantine it, log it, or raise an alert. Every event records the user, the service, the content classification, and the action taken.
Anexet DLP
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