End-to-end encryption is under attack in India. The Indian government’s new and dangerous online intermediary rules forcing messaging applications to track—and be able to identify—the originator of any message, which is fundamentally incompatible with the privacy and security protections of strong encryption. Three petitions have been filed (Facebook; WhatsApp; Arimbrathodiyil) asking the Indian High Courts (in Delhi and Kerala) to strike down these rules.
The traceability provision—Rule 4(2) in the “Intermediary Guidelines and Digital Media Ethics Code” rules (English version starts at page 19)—was adopted by the Ministry of Electronics and Information Technology earlier this year. The rules require any large social media intermediary that provides messaging “shall enable the identification of the first originator of the information on its computer resource” in response to a court order or a decryption request issued under the 2009 Decryption Rules. (The Decryption Rules allow authorities to request the interception or monitoring of decryption of any information generated, transmitted, received, or stored in any computer resource.)
The minister has claimed that the rules will “[not] impact the normal functioning of WhatsApp” and said that “the entire debate on whether encryption would be maintained or not is misplaced” because technology companies can still decide to use encryption—so long as they accept the “responsibility to find a technical solution, whether through encryption or otherwise” that permits traceability. WhatsApp strongly disagrees, writing that “traceability breaks end-to-end encryption and would severely undermine the privacy of billions of people who communicate digitally.”
The Indian government’s assertion is bizarre because the rules compel intermediaries to know information about the content of users’ messages that they currently don’t and which is currently protected by encryption. This legal mandate seeks to change WhatsApp’s security model and technology, and the assumptions somehow seem to imply that such matter needn’t matter to users and needn’t bother companies.
That’s wrong. Because WhatsApp uses a specific privacy-by-design implementation that protects users’ secure communication by making forwarding indistinguishable for the private messaging app from other kinds of communications. So when a WhatsApp user forwards a message using the arrow, it serves to mark the forward information at the client-side, but the fact that the message has been forwarded is not visible to the WhatsApp server. The traceability mandate would make WhatsApp change the application to make this information, which was previously invisible to the server, now visible.
The Indian government also defended the rules by noting that legal safeguards restrict the process of gaining access to the identity of a person who originated a message, that such orders can only be issued for national security and serious crime investigations, and on the basis that “it is not any individual who can trace the first originator of the information.” However, messaging services do not know ahead of time which messages will or will not be subject to such orders; as WhatsApp has noted,
there is no way to predict which message a government would want to investigate in the future. In doing so, a government that chooses to mandate traceability is effectively mandating a new form of mass surveillance. To comply, messaging services would have to keep giant databases of every message you send, or add a permanent identity stamp—like a fingerprint—to private messages with friends, family, colleagues, doctors, and businesses. Companies would be collecting more information about their users at a time when people want companies to have less information about them.
India’s legal safeguards will not solve the core problem:
The rules represent a technical mandate for companies to re-engineer or re-design their systems for every user, not just for criminal suspects.
The overall design of messaging services must change to comply with the government’s demand to identify the originator of a message.
Such changes move companies away from privacy-focused engineering and data minimization principles that should characterize secure private messaging apps.
This provision is one of many features of the new rules that pose a threat to expression and privacy online, but it’s drawn particular attention because of the way it comes into collision with end-to-end encryption. WhatsApp previously wrote:
“Traceability” is intended to do the opposite by requiring private messaging services like WhatsApp to keep track of who-said-what and who-shared-what for billions of messages sent every day. Traceability requires messaging services to store information that can be used to ascertain the content of people’s messages, thereby breaking the very guarantees that end-to-end encryption provides. In order to trace even one message, services would have to trace every message.
Rule 4(2) applies to WhatsApp, Telegram, Signal, iMessage, or any “significant social media intermediaries” with more than 5 million registered users in India. It can also apply to federated social networks such as Mastodon or Matrix if the government decides these pose a “material risk of harm” to national security (rule 6). Free and open-source software developers are also afraid that they’ll be targeted next by this rule (and other parts of the intermediary rules), including for developing or operating more decentralized services. So Facebook and WhatsApp aren’t the only ones seeking to have the rules struck down; a free software developer named Praveen Arimbrathodiyil, who helps run community social networking services in India, has also sued, citing the burdens and risks of the rules for free and open-source software and not-for-profit communications tools and platforms.
This fight is playing out across the world. EFF has long said that end-to-end encryption, where intermediaries do not know the content of users’ messages, is a vitally important feature for private communications, and has criticized tech companies that don’t offer it or offer it in a watered-down or confusing way. Its end-to-end messaging encryption features are something WhatsApp is doing right—following industry best practices on how to protect users—and the government should not try to take this away.
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