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A new open-source software-defined radio project called sdr-- lets users build signal chains visually, linking devices, decoders, displays and recorders on a canvas. It runs a Rust-based server for radio and signal processing paired with a React-based interface that works in a browser or desktop app, and can operate locally or split across a network.
After previously repairing a dead NZXT Signal 4K30 capture device by fixing a bad solder joint, the author found one HDMI source that produced garbled green and pink video during testing. The symptom matches an RGB/YUV colorspace mismatch and had already been reported by other users capturing from a PS5 and Nintendo Switch on Reddit. Since NZXT appears to have discontinued the product, the author decided to investigate the bug themselves using AI-assisted reverse engineering rather than contacting the company.
Signal is moving toward letting users register accounts without providing a phone number, using zero-knowledge proof cryptography to verify accounts without exposing identifying data. The technology mirrors methods Signal already uses for donation badges and group membership, where proofs confirm status without revealing which specific badge or group is involved.
Extending an HDMI setup beyond typical cable lengths can cause attenuation, where the signal weakens and produces flickering, pixelation, or audio dropouts, especially past 25 feet. This becomes a common issue when trying to connect screens across multiple rooms, floors, or conference spaces. A range of inexpensive HDMI accessories, such as extenders and splitters, can help maintain signal quality without expensive rewiring.
Signal has introduced Automatic Key Verification, a key transparency feature that checks whether the public keys stored for your account actually belong to your own devices, reducing reliance on manually comparing safety numbers. Trail of Bits built one of three independent auditors that continuously verify this system by maintaining its own Merkle tree copy of the global key map and periodically signing it to confirm consistency.
A research team has detected an anomalous signal that current physics cannot fully explain, raising the possibility it could be evidence of dark matter or an entirely new phenomenon. The finding comes after years of dedicated searches for dark matter, a substance believed to make up much of the universe's mass but never directly observed.
Anthropic has released a checker that indicates whether a piece of content carries a signal showing it was processed by Claude. The tool only confirms the presence of such a signal and says nothing about the accuracy or quality of the content itself.
Scientists studying hurricanes have identified a pattern in ocean surface temperature gradients that appears tied to episodes of rapid storm intensification, a phenomenon that has long confounded forecasters. By tracking how sharply temperatures shift across ocean regions a storm passes over, researchers believe they can better anticipate when a hurricane is about to strengthen abruptly.
Cryptography professor Matthew Green argued in a widely discussed post that AI's growing ability to find and patch software vulnerabilities could eliminate the security flaws that law enforcement and intelligence agencies rely on to hack devices. He noted this threatens an existing 'truce' in which governments buy spyware and exploits rather than demanding encryption backdoors, since encrypted apps like Signal and iMessage already stymie wiretapping.
Nation-state hacking groups linked to Russia have shifted their phishing campaigns away from email and toward messaging apps like Signal and WhatsApp to target European Union officials. In response, EU governments are reportedly working to move away from these popular consumer messaging platforms for sensitive communications.
An investigation into Python signal handling shows that Python signal handlers, unlike C ones, run outside the strict low-level signal context but can still be re-entered mid-execution if another signal arrives. A test script that rapidly sends SIGUSR1 signals to itself while calling print() inside the handler triggers a RuntimeError, since Python's buffered stdout object detects the reentrant write and refuses to proceed.