System Architecture

Introduction

In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request. Whereas the character sequence User-Agent comprises the name of the header itself, the header value that a given user agent uses to identify itself is colloquially known as its user agent string. The user agent for the operator of a computer used to access the Web has encoded within the rules that govern its behavior the knowledge of how to negotiate its half of a request-response transaction; the user agent thus plays the role of the client in a client–server system. Often considered useful in networks is the ability to identify and distinguish the software facilitating a network session. For this reason, the User-Agent HTTP header exists to identify the client software to the responding server.

In highly-censored regimes, circumvention tools like Tor — a browsing system which provides anonymity and unrestricted internet access — are often targeted by censors. In this article, Reporters Without Borders (RSF) introduces Tor bridges and explains how this technology can be used by journalists to access Tor. After blocking websites…

The Orca initiative aims to produce a unified platform and set of APIs to develop, distribute and run sandboxed graphical applications on a variety of operating systems.

#55: Break Into Amazon Engineering (6 Minutes)

State is time, time is state.

Although quantum processors exist today, they are still a long way off from becoming practical replacements for classical computers. This is due to many practical considerations, not the least of w…

The First Draft of a Report on the EDVAC (commonly shortened to First Draft) is an incomplete 101-page document written by John von Neumann and distributed on June 30, 1945 by Herman Goldstine, security officer on the classified ENIAC project. It contains the first published description of the logical design of a computer using the stored-program concept, which has come to be known as the von Neumann architecture; the name has become controversial due to von Neumann's failure to name other contributors.

A proper security provider that makes heavy use of eBPF will also build on eBPF’s functionalities to offer a comprehensive platform.

On an x86 system the BIOS is the first part of the system to become active along with the basic CPU core(s) functionality, or so things used to be until Intel introduced its Management Engine (IME)…

Part one: https://dayzerosec.com/blog/2023/04/17/reversing-the-amd-secure-processor-psp.html This is a follow-up part 2 to my previous post on the AMD Secure Processor (formerly known as the Platform Security Processor or "PSP"). In that post, I mentioned that the Cryptographic Co-Processor (CCP) is an essential component of how the PSP functions. It's primarily responsible for hardware-accelerated cryptography, but it's also used as a Direct Memory Access (DMA) copy engine for doing mass copy

I’ve really enjoyed using gRPC-Gateway to build gRPC/JSON-over-HTTP (RESTful) APIs in Go for quite a few years now. However, at first glance, itappears to be...

This document describes a framework which extends the Domain Name System (DNS) to provide network awareness to applications. The framework enables DNS system responses that are dependent on communication service requirements such as QoS or path without changes in the format of DNS protocol messages or application program interfaces (APIs). The different enhancement methods and use cases are discussed.

Effects are multiplicative, not additive, when it comes to increasing compute engine performance. And if there is one person who is not worried about how

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Any easy-to-understand guide about SR-IoV, NUMA, QAT, SmartNIC and their importance for high performing servers/whitebox in edge computing

Learn how to create a custom CLI for your organization using Just.

at the University of Massachusetts Amherst

An introduction to NServiceBus Sagas and how they can be used to manage long-running processes in distributed systems.

How do you integrate your own software with ActivityPub? We spoke with Evan Prodromou, who has written a book about fediverse development.

OpenTelemetry is not merely an observability platform, but also a set of best practices and standards that can be integrated into platform engineering or DevOps.

SLMs are a much more cost-effective approach, allowing companies to adapt models to their proprietary data in secure environments.

Matt Holt is the creator of the popular Caddy Web Server.