Imagine receiving a message saying that intimate images of you will be published unless you comply with someone's demands. To make matters worse, the images might not even be real. With today's AI tools, convincing deepfake content can be created in minutes, making it increasingly difficult to distinguish genuine images from fabricated ones.
Situations like these are no longer isolated incidents. The non-consensual sharing of intimate content, whether authentic or AI-generated, has become a growing form of online abuse affecting people regardless of age, gender, or profession.
One initiative designed to help limit the spread of this type of content is StopNCII.org. Rather than uploading your private images to another service, the platform uses digital fingerprinting technology to help participating online platforms identify and remove matching content without exposing the original files.
This article explains how StopNCII works, who it is designed for, how its privacy-preserving technology functions, and where its capabilities begin and end.
What Is Non-Consensual Intimate Image (NCII) Abuse?
Non-Consensual Intimate Images (NCII) refers to the distribution or threatened distribution of intimate photos or videos without the subject's permission.
While the term was once primarily associated with so-called "revenge porn," today's landscape is significantly more complex. NCII now includes stolen private photos, content shared by former partners without consent, images obtained through hacking or sextortion, and increasingly, AI-generated deepfake images depicting individuals in fabricated intimate situations.
The impact often extends well beyond the initial upload. Victims may face reputational damage, emotional distress, financial extortion, harassment, and long-term privacy concerns as content spreads across multiple platforms.
What Is StopNCII.org?
StopNCII.org is an initiative operated by the Revenge Porn Helpline, a service run by the UK-based non-profit organisation SWGfL (South West Grid for Learning). The initiative was developed in collaboration with Meta to help reduce the spread of non-consensually shared intimate images across participating online platforms.
Since its launch, the Revenge Porn Helpline has supported thousands of victims and reports having helped remove hundreds of thousands of non-consensual intimate images from the internet through its support services.
Instead of storing or analysing users' private content, StopNCII focuses on one specific objective: enabling participating platforms to recognise known intimate images through privacy-preserving digital fingerprints before they can continue spreading online.
Who Can Use StopNCII?
StopNCII is available to adults who believe their intimate images are at risk of being shared without their consent.
To use the service:
You must be the person depicted in the image or video.
You must have access to the original file stored on your device.
The content must qualify as intimate, such as nudity or sexually explicit material.
Age Matters — But Not in the Way Many People Assume
Eligibility is determined by your age when the image was created, not your current age.
If you were 18 or older when the image or video was taken, StopNCII is the appropriate service.
If the material was created before your 18th birthday, you should instead use Take It Down, a service operated by the U.S. National Center for Missing & Exploited Children (NCMEC), which is specifically designed for child sexual abuse material and intimate images involving minors.
How Does StopNCII Work?
One of StopNCII's defining features is that your original images never need to leave your device.
The process works as follows:
Select the relevant image or video stored on your device. StopNCII supports a wide range of common image and video formats.
Your browser generates a unique digital fingerprint, known as a hash, directly on your device.
The original image or video is never uploaded to StopNCII's servers.
Once your case is created, you receive a unique Case ID and PIN, allowing you to monitor or withdraw your case at any time. Since StopNCII does not require an email address, these credentials cannot be recovered if lost and should be stored securely.
Only the generated digital fingerprint is shared with participating platforms.
Participating platforms compare that fingerprint against content already uploaded to their own systems. StopNCII also continues checking for matches on supported platforms over time.
If a match is found, the platform reviews the content under its own policies governing non-consensual intimate imagery and determines whether enforcement action is appropriate.
This approach allows platforms to identify matching content without requiring victims to submit or expose their original intimate images.
Are My Photos or Videos Uploaded?
No.
One of StopNCII's strongest privacy protections is that your original files never leave your device.
The platform stores only the digital fingerprint generated from your image or video. The original content is not uploaded, viewed, or retained by StopNCII at any point during the process.
Once the fingerprint has been created, you remain free to delete the original file from your device if you choose. The digital fingerprint will continue to be used for matching across participating platforms as long as your case remains active.
What Is Digital Fingerprinting?
Digital fingerprinting, often referred to as hashing, is a mathematical process that converts a file into a unique identifier.
Think of it as a fingerprint for a digital file. Two identical images generate the same fingerprint, while even small changes to the underlying file can produce a different result.
StopNCII relies on widely recognised, open-source technologies to generate these fingerprints. According to the organisation, PDQ and PhotoDNA are used for images, while MD5 is used for videos.
Rather than identifying people, a digital fingerprint identifies a specific version of a file, allowing participating platforms to recognise matching content without ever receiving the original image itself.
How Can I Check the Status of My Case?
After creating your case, StopNCII provides you with a Case ID and PIN.
Using these credentials, you can access your case dashboard at any time to monitor its status or withdraw your case if needed.
The dashboard indicates whether a matching image has been processed. However, updates are not always immediate, and it may take several days before changes made by participating platforms are reflected in your case status.
Which Platforms Participate?
StopNCII shares digital fingerprints only with organisations participating in the initiative.
The list continues to evolve, but currently includes major platforms such as Meta (Facebook, Instagram and Threads), TikTok, Reddit, Bumble, OnlyFans and Pornhub, among others.
Because participating organisations may change over time, the most up-to-date list is maintained on StopNCII's official Industry Partners page.
Can StopNCII Identify Who Uploaded the Content?
No.
StopNCII is designed to help prevent the spread of non-consensual intimate images- not to identify the person responsible for uploading them.
For privacy and security reasons, the platform does not disclose information such as:
the account that uploaded the content,
the platform on which it first appeared,
the number of times it has been shared, or
the identity of the uploader.
If your goal is to identify the source of the content, monitor its distribution across multiple platforms, or prepare for legal action, platform reporting alone may not be sufficient. Cases like these often require digital evidence collection, platform-specific investigations, and structured case management to preserve relevant information and support any subsequent legal proceedings.
Can StopNCII Be Used for AI-Generated Deepfakes?
Yes- with certain limitations.
If you have a copy of the AI-generated intimate image being used to threaten or target you, and the content contains nudity or sexually explicit material, StopNCII can generate a digital fingerprint for that specific file.
However, this does not mean that every future deepfake depicting you will automatically be detected.
StopNCII works by matching the fingerprint of the exact file submitted. If someone later creates a different version, for example by generating a new deepfake, heavily editing the image, or making significant modifications, the new file may produce a different fingerprint and therefore require a separate submission.
Many participating platforms, including Meta, have introduced policies addressing AI-generated non-consensual intimate content. Even so, StopNCII's technology remains centred on matching the fingerprint of the specific file you provide.
Understanding the Limitations of StopNCII
StopNCII is an effective preventive tool, but it is not a universal solution for every online abuse case.
Its protection is limited to participating platforms. Content shared on independent websites, private forums, encrypted messaging services, or platforms outside the initiative falls outside its scope.
Digital fingerprinting also has technical limitations. If an image is significantly modified, for example through extensive editing, heavy cropping, or by generating an entirely new version- the resulting fingerprint may no longer match the original file.
For these reasons, StopNCII should be viewed as an important first line of defence rather than a complete content removal solution.
What Should You Do If You're Being Threatened?
If someone is threatening to publish intimate images of you, acting quickly can make a significant difference.
Practical steps include:
Never delete threatening messages or conversations.
Preserve URLs, usernames, timestamps, and screenshots wherever possible.
Avoid forwarding or resharing the intimate content yourself.
Create a digital fingerprint using the appropriate service.
Report the content directly through the relevant platform's reporting process.
If extortion, blackmail, or other criminal behaviour is involved, contact the appropriate law enforcement authorities and seek legal advice.
If the content involves someone who was under the age of 18 when it was created, use Take It Down and follow the appropriate child protection reporting procedures.
Depending on the circumstances and the applicable jurisdiction, the creation, possession, distribution, or use of non-consensual intimate content, including AI-generated deepfakes, may give rise to both civil and criminal liability.
What to Remember
StopNCII represents an important step forward in limiting the spread of non-consensual intimate images while protecting victims' privacy.
Its ability to generate digital fingerprints locally, without uploading or storing the original images, is one of the platform's strongest privacy safeguards and a key reason why it has become an important resource for victims worldwide.
At the same time, it is important to understand what the service is designed to do. StopNCII does not monitor the entire internet, identify perpetrators, or guarantee the removal of every copy of an image. Its effectiveness depends on participating platforms and the technical characteristics of the content itself.
In more complex situations, such as coordinated harassment, sextortion, AI-generated deepfakes, or content distributed across multiple platforms, additional technical, operational, and legal measures are often required.
At Govinet, we support organisations and individuals facing these challenges through comprehensive case management. Depending on the circumstances, this may include identifying and documenting infringing content, collecting digital evidence, coordinating platform enforcement actions, and continuously monitoring for further distribution.
Online abuse cases rarely have a single-step solution. Successfully limiting their impact often requires the right combination of technology, operational expertise, and legal coordination, handled with discretion, accuracy, and a strong focus on protecting those affected.
References
StopNCII.org – Official Website
StopNCII – How It Works
StopNCII – Industry Partners
https://stopncii.org/industry-partners/
StopNCII – Frequently Asked Questions
NCMEC – Take It Down
SWGfL – StopNCII Initiative