# Riana Pfefferkorn

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Riana Pfefferkorn on End-to-End Encryption for iPhone Backups to iCloud

Last week, Apple made an announcement about some new security features it would be offering to users. One of those features involves users' ability to opt in to encryption for iPhone backups to iCloud. While this new feature will enhance data privacy and security for those users who choose to opt i…

Mayank Varia and Riana Pfefferkorn on Apple's Decision to Scan for Child Exploitation Material

Two of the biggest controversies in tech are how to stop the spread of child pornography and other exploitation material, and whether encryption prevents legitimate law enforcement investigations. In an announcement last week, Apple dropped a bomb into both of these debates. Apple announced that fu…

The Policy Implications of Grok's 'Mass Digital Undressing Spree'

In what Reuters called a "mass digital undressing spree," Elon Musk is provoking outrage after his Grok chatbot responded to user prompts to remove the clothing from images of women and pose them in bikinis and to create "sexualized images of children" and post them on X. To discuss the controversy…

Why nobody's stopping Grok

Grok, the chatbot made by Elon Musk’s xAI, is able to make all manner of AI-generated images on demand, including non-consensual intimate images of women and minors. It's the kind of "controversy" that would have completely sunk a platform five or 10 years ago, but now it seems clear that Elon want…

Talking Tech with Kate Ruane & Riana Pfefferkorn on Grok AI

Today’s episode takes a deep dive into one of the most high-profile AI controversies in recent months: the debate surrounding Grok AI. From reports that the system generated harmful content — including material related to non-consensual intimate imagery — to broader concerns about safety guardrails…

Deepfake Nudes in Schools: When AI-Enabled Abuse Hits the Classroom

Content note: This episode discusses AI-generated child sexual abuse material, non-consensual intimate imagery, sextortion, and sexual abuse. AI-powered “nudify” apps are increasingly being used by students to create deepfake sexual images of classmates, but most schools still do not have clear pol…

Deepfake Dallas: How AI learned to speak like me

Using artificial intelligence, someone can make an algorithm that sounds just like you. And then they can say... whatever they want you to say. We're entering a brand new era: One where you can no longer trust your ears. Welcome to the world of audio deepfakes. Featuring deepfake wizard Tim McSmyth…

Why nobody's stopping Grok

Grok, the chatbot made by Elon Musk’s xAI, is able to make all manner of AI-generated images on demand, including non-consensual intimate images of women and minors. It's the kind of "controversy" that would have completely sunk a platform five or 10 years ago, but now it seems clear that Elon want…

Here’s why Apple’s new child safety features are so controversial

Nilay Patel is joined by Riana Pfefferkorn and Jennifer King to talk about Apple's new child safety features. Riana and Jen are both researchers at Stanford and between the two of them have expertise in encryption policies and consumer privacy issues. Guest Bio: Riana Pfefferkorn: http://cyberlaw.…