Unknown Channels
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Finite-Blocklength Lossy Joint Source-Channel Coding over Unknown Channels
arXiv:2606.07933v1 Announce Type: new Abstract: We analyze the finite-blocklength performance of lossy joint source-channel codes (JSCC) in an unknown-channel framework, where the true channel is unknown but the source distribution is known. We establish achievability results for mismatched-design JSCC, where the code design is based on a channel $Q_{Y|X}$ but deployed over a different channel $P_{Y|X}$. Our mismatched-design achievability result allows nonstationary channel laws and...
Quantum memory surpasses classical limits for storing unknown quantum operations
June 9, 2026 feature Quantum memory surpasses classical limits for storing unknown quantum operations Ingrid Fadelli Author Sadie Harley Scientific Editor Robert Egan Associate Editor Quantum memories, systems that store and retrieve information leveraging quantum mechanical effects, can outperform classical storage systems on some existing tasks. Yet these promising memories could also complete operations that are very difficult or impossible for classical systems, including the storage and...
Geometry-Structured Channel Reconstruction for Conventional and Fluid Antenna Systems: Bayesian Inference and Fundamental Limits
arXiv:2606.04001v1 Announce Type: cross Abstract: Accurate channel state information (CSI) acquisition is critical for exploiting the spatial flexibility of fluid antenna systems (FASs). However, port selection and transmission optimization require CSI over a large number of candidate port positions, making direct port-wise estimation prohibitively costly in terms of pilot overhead. This paper addresses this challenge through geometry-structured channel reconstruction, which exploits the...
Websites Can Now Spy on You Through Your Hard Drive
Over the decades, there has been no shortage of sites using clever techniques to covertly track visitors’ browsing histories, device fingerprints, and keystrokes and mouse movements in real time. Even Meta and Yandex were recently caught joining in the privacy-invasive free-for-all. Now sites have a new way to spy on their visitors: by measuring subtle interactions with their solid-state drives.
Steganography Without Modification: Hidden Communication via LLM Seeds
Announce Type: new Abstract: We demonstrate that widely deployed Large Language Model (LLM) inference stacks harbor a steganographic channel that requires no modification to model weights, sampling code, or output distributions. The channel exploits a structural property of deterministic decoding: pseudo-random number generators (PRNGs) used in inverse-transform sampling produce a seed-dependent sequence of token-level probability intervals that can be reconstructed from the generated text...
Script reveals methods of Cambodian centre scamming Australians
Police reveal scam script found in Cambodian centre targeting Australians Mon 8 Jun 2026 at 6:13pm In short: Police in Australia and Thailand have released a script discovered in a Cambodian scam compound where a fake Australian Federal Police (AFP) office was found. The script reveals the pressure tactics used to convince people to hand over their bank details in scam calls. The AFP is urging people to be wary of scam calls and says it will never ask them to verify bank details.
A noradrenergic Ih-dependent pacemaker system drives sniffing
Sniffs are rapid breaths generated to clear nasal passages, actively sample air for smelling, and, in infants, rouse from sleep. Rapid shifts between breathing at rest (eupnea) and sniffing point to generation of both behaviors by the core brainstem inspiratory oscillator, the preBotzinger Complex (preBotC). Eupneic rhythm generating mechanisms, when driven faster, are assumed to underlie higher frequency sniffing rhythms; however, the mechanisms governing sniffing have not been directly...
Meet the Harvard grad and goalie who might lead the U.S. to World Cup glory
When Matt Freese was about 10 years old, he set out to solve a problem that existed entirely in his own head. He wanted to be a soccer goalie, but there was another boy his age in the area who was considered better. “He could dive and just fully get airborne,” Freese said.
Psychic poet sues sister over father’s £450,000 will in bitter family inheritance dispute
Psychic poet sues sister over father’s £450,000 will in bitter family inheritance dispute He claims that his father was too ‘mentally confused’ to draw up a will - Bookmark A psychic poet is embroiled in a legal battle over his late father's £450,000 will, which saw him and his other siblings cut out in favour of his younger sister and her daughter. Gary Pammen, also known as Gary Allen or "The Cockney Bard", is an author, poet, and philosopher who has appeared on the BBC, Sky, and ITV. He...
The iPad was on Tailscale: a WebRTC debugging story
If you're not familiar with how p2claw works, it's worth checking out the how it works blog post before diving into this one. I opened one of my p2claw apps on my iPad and got a blank page. The same URL was working on my Mac, my linux box and my phone.