hackernews

1. Reverse Engineering iOS 18 Inactivity Reboot Total comment counts : 21 Summary The article discusses the security differences between the “Before First Unlock” (BFU) and “After First Unlock” (AFU) states on an iPhone: BFU State: When an iPhone is first powered on or after a restart, it requires the user’s passcode to unlock the Secure Enclave Processor (SEP), which holds the keys to decrypt user data. During this state: Face ID and Touch ID do not work; only the passcode can unlock the phone....

1. CSS gets a new logo and it uses the color rebeccapurple Total comment counts : 32 Summary The CSS community has chosen a new official logo through a vote on GitHub, which reflects the design language of other web technology logos like JavaScript and TypeScript. The logo features the color rebeccapurple (#663399), a hue added to the CSS specification in 2014 to honor Rebecca Meyer, the daughter of influential CSS author Eric Meyer....

1. Kyanos: eBPF-based network issue analysis tool Total comment counts : 7 Summary Summary of the Article: Kyanos is an eBPF-based tool designed for network issue analysis, offering capabilities beyond traditional packet capture tools like tcpdump. Here are the key points: Functionality: Kyanos captures network requests (HTTP, Redis, MySQL) and provides detailed analysis without the need for complex packet capturing steps. It aggregates packet metrics across various dimensions to quickly identify issues....

1. Upcoming Hardening in PHP Total comment counts : 11 Summary The article discusses the efforts to enhance security in PHP’s memory allocation system. In 2022, after a talk at BlackAlps about PHP allocator vulnerabilities, the author decided to address these security issues due to the ease of exploiting PHP’s heap. Two years later, they started working on this with Arnaud Le Blanc, focusing on both heap-related and other security enhancements....

1. MomBoard: E-ink display for a parent with amnesia Total comment counts : 40 Summary The article describes the setup of an e-ink display in the apartment of the author’s mother, who suffers from permanent anterograde amnesia following surgery. This condition leaves her unable to form new long-term memories, causing her to live with constant anxiety about her children’s whereabouts and well-being. Traditional reminders like paper notes were ineffective due to her memory issues....

1. No GPS required: our app can now locate underground trains Total comment counts : 56 Summary error Top 1 Comment Summary The article discusses a discovery by a French company named Snips, which developed an app that could detect when a train entered or left a station by utilizing the pressure sensor in smartphones. The app noticed a distinct change in air pressure when the train moved in or out of tunnels, which are common between subway stations....

1. How I ship projects at big tech companies Total comment counts : 80 Summary The article discusses the nuances of project management in large tech companies, focusing on the process of “shipping” a project, which means getting it completed and recognized as successfully launched by company leadership. Here are the key points: Shipping is Not Automatic: Unlike coding, shipping requires active management and prioritization. It doesn’t happen naturally once the code is written or tasks are completed; it requires someone to take charge of the process....

1. I sent an Ethernet packet Total comment counts : 32 Summary The article details the author’s journey in starting a new series on the Low Byte Productions YouTube channel about building a TCP/IP stack from scratch on a microcontroller. The author uses an STM32F401 on a Nucleo development board and a W5100 Ethernet chip from Wiznet, originally designed for Arduino but modified for this project. Here are the key points:...

1. Audio Decomposition – open-source seperation of music to constituent instruments Total comment counts : 12 Summary The project described aims to convert music audio files into sheet music by employing several signal processing techniques: Data Source: The project uses instrument samples from the University of Iowa Electronic Music Studios database. Fourier Transform and Envelope Extraction: The core of the method involves analyzing the music through Fourier transforms to identify the frequencies present (spectrogram approach) and extracting the envelope of the sound wave to characterize the dynamics of the instruments....

1. Delta: A syntax-highlighting pager for Git, diff, grep, and blame output Total comment counts : 24 Summary The article discusses delta, a syntax-highlighting pager designed for enhancing the readability and usability of git, diff, grep, and blame outputs. Here are the key points: Installation: It’s available as “git-delta” in most package managers, with the executable named “delta”. Configuration: Users can configure git to use delta by adding settings to their ~/....