Luftnachrichten Abteilung 350 was a unit of the German Luftwaffe (Air Force) during World War II. The name translates to "Air Signal Department 350." Such units were typically responsible for various tasks related to communications, signals intelligence, and other forms of support for air operations. Luftnachrichtenabteilungen were integral to maintaining effective communication and coordination within the Luftwaffe and between other branches of the military.
The Military Intelligence Service (MIS) of the United States was a World War II-era military organization primarily composed of Japanese American soldiers. It was established to provide intelligence support in the Pacific Theater of Operations during the war. The MIS played a crucial role in the interpretation and translation of Japanese communications and documents, which provided vital information for military operations against Japan.
The National Cryptologic Museum, located near the National Security Agency (NSA) in Fort Meade, Maryland, is dedicated to the history of cryptology and the role it plays in national security. The museum showcases artifacts and exhibits that highlight the development of codes, ciphers, and related technologies throughout history, as well as their impact on military and intelligence operations.
The Special Communications Service of Russia (known in Russian as "Федеральная служба специальной связи и информации" or FSSSI) is a federal agency under the auspices of the government of Russia. Its primary role is to ensure the secure transmission of information for government bodies and the military. The agency is responsible for safeguarding communications, including the development and maintenance of the country's secure communication systems.
National Vigilance Park is a dedicated area in India that highlights the importance of vigilance and integrity in combating corruption. Located in New Delhi, it serves as a memorial and educational space, emphasizing the need for transparency and accountability in public services. The park features various sculptures, inscriptions, and informational displays that raise awareness about the issues of corruption and the role of citizens and officials in promoting ethical governance.
The Naval Security Group (NSG) was a former component of the United States Navy that specialized in electronic warfare and signals intelligence (SIGINT). Established during World War II, the NSG's primary mission was to gather, analyze, and disseminate intelligence derived from intercepted communications and electronic signals. This information was critical for naval operations and national security.
The Research Office of the Reich Air Ministry (German: "Reichsluftfahrtministerium" or RLM) was a key institution in Nazi Germany responsible for the development and research of military aviation technology during World War II. The RLM oversaw various aspects of aviation policy, including the design, production, and procurement of aircraft and aviation equipment. Within the RLM, the Research Office focused on advancing aeronautical engineering and technology, coordinating projects with various aircraft manufacturers and research institutions.
SECG can refer to a few different things depending on the context. However, one of the most common references is to the **Securities Exchange Commission of Ghana**, which is responsible for regulating and overseeing the securities industry in Ghana. Additionally, in a different context, SECG might refer to the **Standardized Electronic Communication Group**, which deals with standards related to electronic communications in various industries.
Operation Stella Polaris was a reconnaissance operation conducted by the Norwegian intelligence service during the Cold War. It began in 1954 and aimed to gather intelligence about Soviet activities in the Arctic region, particularly with respect to military capabilities and NATO’s northern flank. The operation involved surveillance and the collection of information on Soviet submarines, naval bases, and other military installations.
"PC Bruno" could refer to a couple of different things, depending on the context. One possibility is that it refers to a character or persona, such as a fictional character in a game, comic, or media production. Alternatively, it might refer to a specific type of computer configuration, hardware, or particular branding related to PCs associated with someone named Bruno.
RSA Security LLC is an American cybersecurity company that specializes in creating various solutions for identity and access management, threat detection, and encryption. The company is widely known for its development of the RSA encryption algorithm, which is a public-key cryptosystem that is used for secure data transmission and digital signatures. This cryptographic method became foundational to modern cybersecurity practices.
"Radio Battalion" is a video game developed by Mebious, which was released in 2023. It is a strategy game that offers players an engaging mix of tactical decision-making and resource management, set against a military backdrop. In the game, players take on the role of leaders of a battalion, managing units, coordinating strategies, and responding to dynamic battlefield situations.
The Ritchie Boys were a group of mostly Jewish soldiers who served in the U.S. Army during World War II. They were trained at a special intelligence center established at Camp Ritchie in Maryland, where they learned skills in military intelligence, particularly in psychological warfare, interrogation, and translation of captured materials. Many of the Ritchie Boys were immigrants or refugees from Europe, particularly from Germany and Austria.
ABC (A Bit of a Cipher) is a stream cipher designed for lightweight encryption. It was developed with a focus on efficiency and simplicity, making it suitable for constrained environments such as low-power devices or applications requiring fast processing times. Stream ciphers, in general, encrypt plaintext by combining it with a pseudorandom key stream, allowing for the continuous encryption of data bit by bit (or byte by byte). ABC is characterized by its use of additive and XOR operations to generate the key stream.
ANDVT stands for Advanced Narrowband Voice Telecommunication. It is a voice communication system that was developed to provide secure voice services, particularly for military operations. ANDVT is designed to support narrowband communication in tactical environments, ensuring that voice transmissions are clear and encrypted to protect sensitive information from interception. The system typically involves specialized hardware and software that allow for the encryption and decryption of voice signals, as well as features for maintaining communication quality under challenging conditions.
The term "access structure" can refer to different concepts depending on the context in which it is used, particularly in computer science and cryptography. Here are two common interpretations: 1. **Access Control in Computer Security**: In the realm of computer security, an access structure defines the rules governing who can access certain resources or data within a system. This could be in the context of a file system, a database, or an application.
"Station CAST" is a scientific initiative aimed at advancing our understanding of climate change and its effects on the environment, particularly in oceanic regions. It involves a network of observation stations equipped with advanced sensors and instruments that collect data on various environmental parameters. This data can include ocean temperature, salinity, pH levels, and biological activity, among other factors.
The United States Coast Guard Unit 387, commonly referred to as the Cryptanalysis Unit, was a specialized team within the Coast Guard responsible for cryptological operations. Its primary mission was to analyze and decrypt communications that are significant for national security and maritime operations. This would typically involve intercepting, decoding, and analyzing encrypted messages that could affect Coast Guard missions, such as search and rescue, law enforcement, and national defense.
FIPS 140-3 (Federal Information Processing Standards Publication 140-3) is a U.S. government standard that specifies the security requirements for cryptographic modules. It is part of a suite of standards maintained by the National Institute of Standards and Technology (NIST) and is intended to provide a framework for the development and validation of cryptographic hardware and software used by federal agencies and their contractors to protect sensitive information.
IEEE 802.1AE is a standard defined by the Institute of Electrical and Electronics Engineers (IEEE) for Media Access Control (MAC) Security. It is part of the IEEE 802 family of networking standards and is specifically aimed at providing security features at the data link layer (Layer 2) of the OSI model. The primary purpose of IEEE 802.1AE is to offer confidentiality, integrity, and authenticity for the data frames transmitted over local area networks (LANs).

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact