Cryptography is the process of hiding or coding information so that only the person a message was intended for can read it. The art of cryptography has been used to code messages for thousands of years and continues to be used in bank cards, computer passwords, and ecommerce. Modern cryptography techniques include algorithms and ciphers that enable the encryption and decryption of information, such as 128‑bit and 256‑bit encryption keys. Modern ciphers, such as the Advanced Encryption Standard (AES), are considered virtually unbreakable.

A common cryptography definition is the practice of coding information to ensure only the person that a message was written for can read and process the information. This cybersecurity practice, also known as cryptology, combines various disciplines like computer science, engineering, and mathematics to create complex codes that hide the true meaning of a message. Cryptography can be traced all the way back to ancient Egyptian hieroglyphics but remains vital to securing communication and information in transit and preventing it from being read by untrusted parties. It uses algorithms and mathematical concepts to transform messages into difficult‑to‑decipher codes through techniques like cryptographic keys and digital signing to protect data privacy, credit card transactions, email, and web browsing.

Cryptography remains important to protecting data and users, ensuring confidentiality, and preventing cyber criminals from intercepting sensitive corporate information. Individuals and organizations use cryptography on a daily basis to protect their privacy and keep their conversations and data confidential. The technique ensures confidentiality by encrypting sent messages using an algorithm with a key only known to the sender and recipient. A common example of this is the messaging tool WhatsApp, which encrypts conversations between people to ensure they cannot be hacked or intercepted. It also secures browsing, such as with virtual private networks (VPNs), which use encrypted tunnels, asymmetric encryption, and public and private shared keys.

Similar to how cryptography can confirm the authenticity of a message, it can also prove the integrity of the information being sent and received. The technology also ensures information is not altered while in storage or during transit between the sender and the intended recipient. For example, digital signatures can detect forgery or tampering in software distribution and  financial transactions.Cryptography confirms accountability and responsibility from the sender of a message, which means they cannot later deny their intentions when they created or transmitted information. Digital signatures are a good example of this, as they ensure a sender cannot claim a message, contract, or document they created to be fraudulent. Furthermore, in email nonrepudiation, email tracking makes sure the sender cannot deny sending a message and a recipient cannot deny receiving it.

There are many types of cryptographic algorithms available. They vary in complexity and security, depending on the type of communication and the sensitivity of the information being shared.

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TEXT I

The Growing Complexity of Airspace

        The aviation industry has witnessed unprecedented growth in recent years. The number of flights, both commercial and private, has surged, resulting in a more congested airspace. This increased traffic volume places immense strain on air traffic controllers, who must manage a complex web of aircraft movements with precision and efficiency.

        Moreover, the integration of unmanned aerial vehicles (UAVs or drones) into the airspace adds another layer of complexity. While drones offer various benefits, their unregulated use poses significant risks to commercial aviation. Harmonizing the operations of manned and unmanned aircraft is a major challenge that requires careful consideration and robust regulations.

        Despite advancements in aviation technology, the air traffic control system still relies heavily on outdated infrastructure and systems. Many air traffic control centers operate with aging equipment that is prone to failures and lacks the capacity to handle the increasing volume of traffic. This infrastructure gap can lead to delays, inefficiencies, and safety concerns.

         Furthermore, the integration of new technologies, such as advanced automation and data analytics, has been slow. While these technologies hold the potential to revolutionize air traffic management, their implementation has been hindered by various factors, including cost, interoperability, and cybersecurity concerns.

        Air traffic control is a high-pressure job that demands exceptional focus, decision-making skills, and situational awareness. While air traffic controllers undergo rigorous training, human error remains a significant risk factor. Factors such as fatigue, stress, and workload can contribute to mistakes that have serious consequences. […]

        The increasing reliance on technology in the aviation industry has made it a prime target for cyberattacks. Air traffic control systems are critical infrastructure and must be protected from malicious actors. A successful cyberattack could have catastrophic consequences, including loss of life and economic damage. […]

        Addressing the problems facing air traffic control requires a multi-faceted approach involving collaboration between government agencies, aviation industry stakeholders, and technology providers.

Adapted from https://birminghamjournal.co.uk/ problems-with-air-traffic-control-today/

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     What is the difference between access point and router?

    The router acts as a hub that sets up a local area network and manages all of the devices and communication in it. An access point, on the other hand, is a sub-device within the local area network that provides another location for devices to connect from and enables more devices to be on the network.

    Wireless routers can function as access points, but not all access points can work as routers. While routers manage local area networks, communicate with outside network systems, acquire, distribute, and dispatch data in multiple directions, establish a point of connectivity, and ensure security, access points typically only provide access to the router’s established network.

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