Tech
Graffiti framework lets people personalize online social spaces while staying connected with others

Say a local concert venue wants to engage its community by giving social media followers an easy way to share and comment on new music from emerging artists. Rather than working within the constraints of existing social platforms, the venue might want to create its own social app with the functionality that would be best for its community. But building a new social app from scratch involves many complicated programming steps, and even if the venue can create a customized app, the organization’s followers may be unwilling to join the new platform because it could mean leaving their connections and data behind.
Now, researchers from MIT have launched a framework called Graffiti that makes building personalized social applications easier, while allowing users to migrate between multiple applications without losing their friends or data.
“We want to empower people to have control over their own designs rather than having them dictated from the top down,” says electrical engineering and computer science graduate student Theia Henderson.
Henderson and her colleagues designed Graffiti with a flexible structure so individuals have the freedom to create a variety of customized applications, from messenger apps like WhatsApp to microblogging platforms like X to location-based social networking sites like Nextdoor, all using only front-end development tools like HTML.
The protocol ensures all applications can interoperate, so content posted on one application can appear on any other application, even those with disparate designs or functionality. Importantly, Graffiti users retain control of their data, which is stored on a decentralized infrastructure rather than being held by a specific application.
While the pros and cons of implementing Graffiti at scale remain to be fully explored, the researchers hope this new approach can someday lead to healthier online interactions.
“We’ve shown that you can have a rich social ecosystem where everyone owns their own data and can use whatever applications they want to interact with whoever they want in whatever way they want. And they can have their own experiences without losing connection with the people they want to stay connected with,” says David Karger, professor of EECS and a member of the Computer Science and Artificial Intelligence Laboratory (CSAIL).
Henderson, the lead author, and Karger are joined by MIT Research Scientist David D. Clark on a paper about Graffiti, which will be presented at the ACM Symposium on User Interface Software and Technology.
Personalized, integrated applications
With Graffiti, the researchers had two main goals: to lower the barrier to creating personalized social applications and to enable those personalized applications to interoperate without requiring permission from developers.
To make the design process easier, they built a collective back-end infrastructure that all applications access to store and share content. This means developers don’t need to write any complex server code. Instead, designing a Graffiti application is more like making a website using popular tools like Vue.
Developers can also easily introduce new features and new types of content, giving them more freedom and fostering creativity.
“Graffiti is so straightforward that we used it as the infrastructure for the intro to web design class I teach, and students were able to write the front-end very easily to come up with all sorts of applications,” Karger says.
The open, interoperable nature of Graffiti means no one entity has the power to set a moderation policy for the entire platform. Instead, multiple competing and contradictory moderation services can operate, and people can choose the ones they like.
Graffiti uses the idea of “total reification,” where every action taken in Graffiti, such as liking, sharing, or blocking a post, is represented and stored as its own piece of data. A user can configure their social application to interpret or ignore those data using its own rules.
For instance, if an application is designed so a certain user is a moderator, posts blocked by that user won’t appear in the application. But for an application with different rules where that person isn’t considered a moderator, other users might just see a warning or no flag at all.
“Theia’s system lets each person pick their own moderators, avoiding the one-sized-fits-all approach to moderation taken by the major social platforms,” Karger says.
But at the same time, having no central moderator means there is no one to remove content from the platform that might be offensive or illegal.
“We need to do more research to understand if that is going to provide real, damaging consequences or if the kind of personal moderation we created can provide the protections people need,” he adds.
Empowering social media users
The researchers also had to overcome a problem known as context collapse, which conflicts with their goal of interoperation.
For instance, context collapse would occur if a person’s Tinder profile appeared on LinkedIn, or if a post intended for one group, like close friends, would create conflict with another group, such as family members. Context collapse can lead to anxiety and have social repercussions for the user and their different communities.
“We realize that interoperability can sometimes be a bad thing. People have boundaries between different social contexts, and we didn’t want to violate those,” Henderson says.
To avoid context collapse, the researchers designed Graffiti so all content is organized into distinct channels. Channels are flexible and can represent a variety of contexts, such as people, applications, locations, etc.
If a user’s post appears in an application channel but not their personal channel, others using that application will see the post, but those who only follow this user will not.
“Individuals should have the power to choose the audience for whatever they want to say,” Karger adds.
The researchers created multiple Graffiti applications to showcase personalization and interoperability, including a community-specific application for a local concert venue, a text-centric microblogging platform patterned off X, a Wikipedia-like application that enables collective editing, and a real-time messaging app with multiple moderation schemes patterned off WhatsApp and Slack.
“It also leaves room to create so many social applications people haven’t thought of yet. I’m really excited to see what people come up with when they are given full creative freedom,” Henderson says.
In the future, she and her colleagues want to explore additional social applications they could build with Graffiti. They also intend to incorporate tools like graphical editors to simplify the design process. In addition, they want to strengthen Graffiti’s security and privacy.
And while there is still a long way to go before Graffiti could be implemented at scale, the researchers are currently running a user study as they explore the potential positive and negative impacts the system could have on the social media landscape.
More information:
Theia Henderson et al, Graffiti: Enabling an Ecosystem of Personalized and Interoperable Social Applications, Proceedings of the 38th Annual ACM Symposium on User Interface Software and Technology (2025). DOI: 10.1145/3746059.3747627
This story is republished courtesy of MIT News (web.mit.edu/newsoffice/), a popular site that covers news about MIT research, innovation and teaching.
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Tech
AOL’s dial up internet takes its last bow, marking the end of an era

It’s official: AOL’s dial-up internet has taken its last bow.
AOL previously confirmed it would be pulling the plug on Tuesday (Sept. 30)—writing in a brief update on its support site last month that it “routinely evaluates” its offerings and had decided to discontinue dial-up, as well as associated software “optimized for older operating systems,” from its plans.
Dial-up is now no longer advertised on AOL’s website. As of Wednesday, former company help pages like “connect to the internet with AOL Dialer” appeared unavailable—and nostalgic social media users took to the internet to say their final goodbyes.
AOL, formerly America Online, introduced many households to the World Wide Web for the first time when its dial-up service launched decades ago, rising to prominence particularly in the 90s and early 2000s.
The creaky door to the internet was characterized by a once-ubiquitous series of beeps and buzzes heard over the phone line used to connect your computer online—along with frustrations of being kicked off the web if anyone else at home needed the landline for another call, and an endless bombardment of CDs mailed out by AOL to advertise free trials.
Eventually, broadband and wireless offerings emerged and rose to dominance, doing away with dial-up’s quirks for most people accessing the internet today—but not everyone.
A handful of consumers have continued to rely on internet services connected over telephone lines. In the U.S., according to Census Bureau data, an estimated 163,401 households were using dial-up alone to get online in 2023, representing just over 0.13% of all homes with internet subscriptions nationwide.
While AOL was the largest dial-up internet provider for some time, it wasn’t the only one to emerge over the years. Some smaller internet providers continue to offer dial-up today. Regardless, the decline of dial-up has been a long time coming. And AOL shutting down its service arrives as other relics of the internet’s earlier days continue to disappear.
Microsoft retired video calling service Skype just earlier this year—as well as Internet Explorer back in 2022. And in 2017, AOL discontinued its Instant Messenger—a chat platform that was once lauded as the biggest trend in online communication since email when it was founded in 1997, but later struggled to ward off rivals.
AOL itself is far from the dominant internet player it was decades ago—when, beyond dial-up and IMs, the company also became known for its “You’ve got mail” catchphrase that greeted users who checked their inboxes, as famously displayed in the 1998 film starring Tom Hanks and Meg Ryan by the same name.
Before it was America Online, AOL was founded as Quantum Computer Services in 1985. It soon rebranded and hit the public market in 1991. Near the height of the dot-com boom, AOL’s market value reached nearly $164 billion in 2000. But tumultuous years followed, and that valuation plummeted as the once-tech pioneer bounced between multiple owners. After a disastrous merger with Time Warner Inc., Verizon acquired AOL—which later sold AOL, along with Yahoo, to a private equity firm.
AOL now operates under the larger Yahoo name. A spokesperson for Yahoo didn’t have any additional statements about the end of AOL’s dial-up when reached by The Associated Press on Wednesday—directing customers to its previous summer announcement.
At the time Verzion it sold AOL in 2021, an anonymous source familiar with the transaction told CNBC that the number of AOL dial-up users was “in the low thousands”—down from 2.1 million when Verzion first moved to acquire AOL in 2015, and far below peak demand seen back in the 90s and early 2000s. But beyond dial-up, AOL continues to offer its free email services, as well as subscriptions that advertise identity protection and other tech support.
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AOL’s dial up internet takes its last bow, marking the end of an era (2025, October 1)
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Tech
This Startup Wants to Put Its Brain-Computer Interface in the Apple Vision Pro

Now, Cognixion is bringing its AI communication app to the Vision Pro, which Forsland says has more functionality than the purpose-built Axon-R. “The Vision Pro gives you all of your apps, the app store, everything you want to do,” he says.
Apple opened the door to BCI integration in May, when it announced a new protocol to allow users with severe mobility disabilities to control the iPhone, iPad, and Vision Pro without physical movement. Another BCI company, Synchron, whose implant is inserted into a blood vessel adjacent to the brain, has also integrated its system with the Vision Pro. (Apple is not known to be developing its own BCI)
In Cognixion’s trial, the company has swapped out Apple’s headband for its own, which is embedded with six electroencephalographic, or EEG, sensors. These collect information from the brain’s visual and parietal cortex, located at the back of the head. Specifically, Cognixion’s system identifies visual fixation signals, which occur when a person is maintaining their gaze on an object. This allows users to select from a menu of options in the interface using mental attention alone. A neural computing pack worn at the hip processes brain data outside of the Vision Pro.
“The philosophy of our approach is around reducing the amount of burden that is being generated by the person’s communication needs,” says Chris Ullrich, Cognixion’s chief technology officer.
Current communication tools can help but aren’t ideal. For instance, low-tech handheld letterboards allow patients to look at certain letters, words, or pictures so that a caregiver can guess their meaning, but they’re time-consuming to use. And eye tracking technology is still expensive and not always reliable.
“We actually build an AI for each individual participant that is customized with their history of speaking, their style of their humor, anything they’ve written, anything they’ve said, that we can gather. We crunch all that down into something that is a user proxy,” Ullrich says.
Tech
EU Chat Control plans pose ‘existential catastrophic risk’ to encryption, says Signal | Computer Weekly

European proposals to require technology companies to scan the contents of communications sent through encrypted email and messaging services pose an “existential catastrophic risk”, it was claimed last night.
Encrypted messaging service Signal, which is widely used by governments, businesses and the public to send secure messaging services, warned that passing new legislation “negates the very purpose of encryption”.
The European Council is due to vote on Danish proposals on 14 October to mandate emailing and messaging services to install machine learning and scanning technology on mobile phones and computers to identify and report suspected child abuse images.
European Union (EU) member states are divided on the scheme, dubbed Chat Control, which has been widely criticised by cryptographers and security researchers who claim that mandatory scanning would create security vulnerabilities that could be exploited by hackers and hostile nation states.
Signal’s vice-president for global affairs, Udbhav Tiwari, said that if the proposals became law they would introduce “massive glaring vulnerabilities” into operating systems used on phones and computers.
“Malicious actors will start using this capability to gain access that would simply be unthinkable for them under the current security paradigms of how operating systems have been implemented,” he said.
Under the Danish proposals, technology companies would be required to introduce client-side scanning technologies that will use hash functions to identify known abuse images and machine learning algorithms to identify unknown images. One way to enforce it would be to require software companies to introduce scanning capabilities in widely used operating systems, such as Windows, Apple’s MacOS and iOS, and Google’s Android.
Security vulnerabilities
Tiwari, speaking in an online-discussion, said that law enforcement and intelligence agencies in Europe have pressed for government devices to be exempt from mandatory scanning to protect the security of government data from security vulnerabilities.
“You can imagine, if an intelligence agency wants to make sure that its servers and services don’t have this technology, the CEO of a multibillion-dollar company probably doesn’t want its C suite to be susceptible to the same risks,” he added.
Critics say that Chat Control would be expensive to implement, as it would require EU countries to deploy thousands of law enforcement officers to manually review images that had been identified as suspect by scanning algorithms that are prone to produce false positives or false negatives.
The proposals are likely to face legal challenges if they are enacted, said Asha Allen, secretary general for the Centre for Democracy and Technology Europe.
She said the European Council’s own lawyers had raised reservations about the lawfulness of the proposals.
The European Court of Human Rights, for example, found that in the case of Podchasov v Russia that attempts to weaken encryption or create “backdoors” are in breach of privacy rights.
The Chat Control proposals are “inherently disproportionate” as they would “require scanning private messages and content of users who have no allegations or suspicions or wrongdoing against them”, said Allen.
They are also likely to breach General Data Protection Regulation data protection regulations, which require people to give their “informed consent” before their private messages are scanned.
Those that refuse will not have full access to encrypted messaging or email services, in what Allen said amounts to “coercive consent” and a breach of data protection law.
Critics say that Europe may ultimately need to make it unlawful for people to use techniques that could bypass client-side scanning if the measures become law, by, for example, making it illegal to modify operating systems that contain client-side scanning software, and banning the use of virtual private networks.
Tiwari said that criminals and bad actors would find ways to circumvent Chat Control, but that people who want to use encryption for legitimate purposes would lose their privacy.
Top computer and security experts warned in a scientific paper that now-abandoned plans by Apple to introduce client-side scanning in 2021 were unworkable, prone to abuse by criminals, and a threat to safety and security.
EU member states are divided on the Chat Control proposals, with 12 in favour, including France, Denmark and Spain. The Netherlands, Finland and Poland are among six countries opposing. The eight undecided states include Belgium, Germany, Sweden and Greece.
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