Tootfinder

Analysis of X's new XChat shows that X can probably decrypt users' messages, as it holds users' private keys on its servers (Matthew Green/A Few Thoughts ...)
https://blog.cryptographyengineering.com/2025/06/09/a-bi…

A bit more on Twitter/X’s new encrypted messaging
Matthew Garrett has a nice post about Twitter (uh, X)’s new end-to-end encryption messaging protocol, which is now called XChat. The TL;DR of Matthew’s post is that from a cryptographic…

flickr_growth: Flickr friendship network (2008)
A network of declared friendships among Frickr users. Nodes represent Frickr users and a directed edge (i,j) represents a directed declaration of friendship from i to j. Edges are timestamped.
This network has 2302925 nodes and 33140017 edges.
Tags: Social, Online, Unweighted, Timestamps
h…

Leveraging Multimodal Data and Side Users for Diffusion Cross-Domain Recommendation
Fan Zhang, Jinpeng Chen, Huan Li, Senzhang Wang, Yuan Cao, Kaimin Wei, JianXiang He, Feifei Kou, Jinqing Wang
https://arxiv.org/abs/2507.04000

Leveraging Multimodal Data and Side Users for Diffusion Cross-Domain Recommendation
Cross-domain recommendation (CDR) aims to address the persistent cold-start problem in Recommender Systems. Current CDR research concentrates on transferring cold-start users' information from the auxiliary domain to the target domain. However, these systems face two main issues: the underutilization of multimodal data, which hinders effective cross-domain alignment, and the neglect of side users who interact solely within the target domain, leading to inadequate learning of the target domain's…

The Lock-in Hypothesis: Stagnation by Algorithm
Tianyi Alex Qiu, Zhonghao He, Tejasveer Chugh, Max Kleiman-Weiner
https://arxiv.org/abs/2506.06166 https://…

The Lock-in Hypothesis: Stagnation by Algorithm
The training and deployment of large language models (LLMs) create a feedback loop with human users: models learn human beliefs from data, reinforce these beliefs with generated content, reabsorb the reinforced beliefs, and feed them back to users again and again. This dynamic resembles an echo chamber. We hypothesize that this feedback loop entrenches the existing values and beliefs of users, leading to a loss of diversity and potentially the lock-in of false beliefs. We formalize this hypothe…

Breaking Anonymity at Scale: Re-identifying the Trajectories of 100K Real Users in Japan
Abhishek Kumar Mishra, Mathieu Cunche, Heber H. Arcolezi
https://arxiv.org/abs/2506.05611 …

Breaking Anonymity at Scale: Re-identifying the Trajectories of 100K Real Users in Japan
Mobility traces represent a critical class of personal data, often subjected to privacy-preserving transformations before public release. In this study, we analyze the anonymized Yjmob100k dataset, which captures the trajectories of 100,000 users in Japan, and demonstrate how existing anonymization techniques fail to protect their sensitive attributes. We leverage population density patterns, structural correlations, and temporal activity profiles to re-identify the dataset's real-world locatio…

Apparently DHH announced he’s moving to Linux; no big surprise there as there’s a sizable fraction of right-wing users of it (somewhere in the “rational-thinking, free speech, meritocracy & libertarian with a sprinkle of pseudoscience” oeuvre).
Something the Linux community has never managed to effectively deal with.

Study of AP Association and Users and Power Allocation for Cell-Free Massive MIMO Systems
S. Mohammadzadeh, S. Mashdour, R. C. de Lamare, K. Cumanan, C. Li
https://arxiv.org/abs/2507.03848

Study of AP Association and Users and Power Allocation for Cell-Free Massive MIMO Systems
This paper introduces an access point-user (AP-UE) association strategy combined with pilot power allocation to mitigate multiuser interference and enhance spectral efficiency (SE) in clustered cell-free massive MIMO (CCF-mMIMO) networks. We propose a dynamic channel-based clustering method that groups APs according to their channel correlation, ensuring users are associated with APs exhibiting similar channel characteristics. The proposed approach exploits hierarchical clustering, enabling fle…

Bluesky rolls out Activity Notifications, letting users receive notifications of new posts and replies from selected accounts, as it expands its sports presence (Richard Lawler/The Verge)
https://www.theverge.com/news/699671/bluesky-push-n…

Bluesky can really keep up with the news now that it has activity notifications
Bluesky’s latest update added more notification settings, as well as activity notifications to see whenever certain accounts have a new post.

Apple unveils iPadOS 26 with new features to help users manipulate windows, including fluidly resizing them and opening more at once, a new Files app, and more (David Pierce/The Verge)
https://www.theverge.com/apple/679420/apple-ipados-wwdc-2025

Apple launches iPadOS 26 with a new look and way better multitasking
Is the iPad more Mac, or more iPhone? Apple’s still trying to figure that out.

Apple unveils an updated Spotlight in macOS Tahoe, letting users quickly take actions in apps from playing music to creating notes and files, similar to Raycast (David Pierce/The Verge)
https://www.theverge.com/apple/682950/apple-spotlight-mac-shortcuts

Apple’s Spotlight upgrades look like a power-user dream
At WWDC 2025, Apple announced a big update to Spotlight that makes it a far more powerful system for launching and doing things on your Mac.