Just Banning Minors From Social Media Is Not Protecting Them
By publishing its guidelines under Article 28 of the Digital Services Act, the European Commission has taken a major step towards social media bans that will undermine privacy, expression, and participation rights for young people that are already enshrined in international human rights law.
EFF recently submitted feedback to the Commission’s consultation on the guidelines, emphasizing a critical point: Online safety for young people must include privacy and security for them and must not come at the expense of freedom of expression and equitable access to digital spaces.
Article 28 requires online platforms to take appropriate and proportionate measures to ensure a high level of safety, privacy and security of minors on their services. But the article also prohibits targeting minors with personalized ads, a measure that would seem to require that platforms know that a user is a minor. The DSA acknowledges that there is an inherent tension between ensuring a minor’s privacy and requiring platforms to know the age of every user. The DSA does not resolve this tension. Rather, it states that service providers should not be incentivized to collect the age of their users, and Article 28(3) makes a point of not requiring service providers to collect and process additional data to assess whether a user is underage.
Thus, the question of age checks is a key to understanding the obligations of online platforms to safeguard minors online. Our submission explained the serious concerns that age checks pose to the rights and security of minors. All methods for conducting age checks come with serious drawbacks. Approaches to verify a user’s age generally involve some form of government-issued ID document, which millions of people in Europe—including migrants, members of marginalized groups and unhoused people, exchange students, refugees and tourists—may not have access to.
Other age assurance methods, like biometric age estimation, age estimation based on email addresses or user activity, involve the processing of vast amounts of personal, sensitive data – usually in the hands of third parties. Beyond being potentially exposed to discrimination and erroneous estimations, users are asked to trust platforms’ intransparent supply chains and hope for the best. Age assurance methods always impact the rights of children and teenagers: Their rights to privacy and data protection, free expression, information and participation.
The Commission's guidelines contain a wealth of measures elucidating the Commission's understanding of "age appropriate design" of online services. We have argued that some of them, including default settings to protect users’ privacy, effective content moderation and ensuring that recommender systems’ don’t rely on the collection of behavioral data, are practices that would benefit all users.
But while the initial Commission draft document considered age checks as only a tool to determine users’ ages to be able to tailor their online experiences according to their age, the final guidelines go far beyond that. Crucially, the European Commission now seems to consider “measures restricting access based on age to be an effective means to ensure a high level of privacy, safety and security for minors on online platforms” (page 14).
This is a surprising turn, as many in Brussels have considered social media bans like the one Australia passed (and still doesn’t know how to implement) disproportionate. Responding to mounting pressure from Member States like France, Denmark, and Greece to ban young people under a certain age from social media platforms, the guidelines contain an opening clause for national rules on age limits for certain services. According to the guidelines, the Commission considers such access restrictions appropriate and proportionate where “union or national law, (...) prescribes a minimum age to access certain products or services (...), including specifically defined categories of online social media services”. This opens the door for different national laws introducing different age limits for services like social media platforms.
It’s concerning that the Commission generally considers the use of age verification proportionate in any situation where a provider of an online platform identifies risks to minors’ privacy, safety, or security and those risks “cannot be mitigated by other less intrusive measures as effectively as by access restrictions supported by age verification” (page 17). This view risks establishing a broad legal mandate for age verification measures.
It is clear that such bans will do little in the way of making the internet a safer space for young people. By banning a particularly vulnerable group of users from accessing platforms, the providers themselves are let off the hook: If it is enough for platforms like Instagram and TikTok to implement (comparatively cheap) age restriction tools, there are no incentives anymore to actually make their products and features safer for young people. Banning a certain user group changes nothing about problematic privacy practices, insufficient content moderation or business models based on the exploitation of people’s attention and data. And assuming that teenagers will always find ways to circumvent age restrictions, the ones that do will be left without any protections or age-appropriate experiences.
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Zero Knowledge Proofs Alone Are Not a Digital ID Solution to Protecting User Privacy
In the past few years, governments across the world have rolled out digital identification options, and now there are efforts encouraging online companies to implement identity and age verification requirements with digital ID in mind. This blog is the first in this short series that will explain digital ID and the pending use case of age verification. The following posts will evaluate what real protections we can implement with current digital ID frameworks and discuss how better privacy and controls can keep people safer online.
Age verification measures are having a moment, with policymakers in the U.S. and around the world passing legislation mandating online services and companies to introduce technologies that require people to verify their identities to access content deemed appropriate for their age. But for most people, having physical government documentation like a driver's license, passport, or other ID is not a simple binary of having it or not. Physical ID systems involve hundreds of factors that impact their accuracy and validity, and everyday situations occur where identification attributes can change, or an ID becomes invalid or inaccurate or needs to be reissued: addresses change, driver’s licenses expire or have suspensions lifted, or temporary IDs are issued in lieu of obtaining permanent identification.
The digital ID systems currently being introduced potentially solve some problems like identity fraud for business and government services, but leave the holder of the digital ID vulnerable to the needs of the companies collecting such information. State and federal embrace of digital ID is based on claims of faster access, fraud prevention, and convenience. But with digital ID being proposed as a means of online verification, it is just as likely to block claims of public assistance and other services as facilitate them. That’s why legal protections are as important as the digital IDs themselves. To add to this, in places that lack comprehensive data privacy legislation, verifiers are not heavily restricted in what they can and can’t ask the holder. In response, some privacy mechanisms have been suggested and few have been made mandatory, such as the promise that a feature called Zero Knowledge Proofs (ZKPs) will easily solve the privacy aspects of sharing ID attributes.
Zero Knowledge Proofs: The Good NewsThe biggest selling point of modern digital ID offerings, especially to those seeking to solve mass age verification, is being able to incorporate and share something called a Zero Knowledge Proof (ZKP) for a website or mobile application to verify ID information, and not have to share the ID itself or information explicitly on it. ZKPs provide a cryptographic way to not give something away, like your exact date of birth and age from your ID, instead offering a “yes-or-no” claim (like above or below 18) to a verifier requiring a legal age threshold. More specifically, two properties of ZKPs are “soundness” and “zero knowledge.” Soundness is appealing to verifiers and governments to make it hard for an ID holder to present forged information (the holder won’t know the “secret”). Zero-Knowledge can be beneficial to the holder, because they don’t have to share explicit information like a birth date, just cryptographic proof that said information exists and is valid. There have been recent announcements from major tech companies like Google who plan to integrate ZKPs for age verification and “where appropriate in other Google products”.
Zero Knowledge Proofs: The Bad NewsWhat ZKPs don’t do is mitigate verifier abuse or limit their requests, such as over-asking for information they don’t need or limiting the number of times they request your age over time. They don’t prevent websites or applications from collecting other kinds of observable personally identifiable information like your IP address or other device information while interacting with them.
ZKPs are a great tool for sharing less data about ourselves over time or in a one time transaction. But this doesn’t do a lot about the data broker industry that already has massive, existing profiles of data on people. We understand that this was not what ZKPs for age verification were presented to solve. But it is still imperative to point out that utilizing this technology to share even more about ourselves online through mandatory age verification establishes a wider scope for sharing in an already saturated ecosystem of easily linked, existing personal information online. Going from presenting your physical ID maybe 2-3 times a week to potentially proving your age to multiple websites and apps every day online is going to render going online itself as a burden at minimum and a barrier entirely at most for those who can’t obtain an ID.
Protecting The Way ForwardMandatory age verification takes the potential privacy benefits of mobile ID and proposed ZKPs solutions, then warps them into speech chilling mechanisms.
Until the hard questions of power imbalances for potentially abusive verifiers and prevention of phoning home to ID issuers are addressed, these systems should not be pushed forward without proper protections in place. A more private, holder-centric ID is more than just ZKPs as a catch all for privacy concerns. The case of safety online is not solved through technology alone, and involves multiple, ongoing conversations. Yes, that sounds harder to do than age checks online for everyone. Maybe, that’s why this is so tempting to implement. However, we encourage policy and law makers to look into what is best, and not what is easy.