Cybersecurity: How the Internet Protects User Data

Transmitting information over the Internet carries certain risks. When paying for goods with a bank card or sending emails, we rely on the security of our data and hope that it will not fall into the hands of intruders. Protecting personal information online is an important concern for every user, as a data leak can have serious consequences. Therefore, it is necessary to take precautions and use reliable encryption and authentication methods to protect your finances and personal information.

The Internet was created with an emphasis on protecting sensitive information. To ensure security, secure communication channels are established between clients and servers. For example, when viewing a web page in a browser, a lock icon often appears next to the URL. This indicates that data is being transmitted using the secure HTTPS protocol, where "S" stands for "Secure". Using HTTPS ensures data encryption, which protects it from unauthorized access and ensures user security online.

How does it work? When information is transmitted from a user to a website and back, it passes through nodes on the Internet. Each of these nodes poses a risk of data interception by attackers. To prevent information leakage, each piece of data, called a packet, is encrypted, making it unreadable if intercepted. To ensure secure data transmission, the Transport Layer Security (TLS) cryptographic protocol is used, which is also used in email, IP telephony, and instant messaging. Thus, TLS ensures the confidentiality and integrity of data, which is critical in today's digital world.

TLS is a reliable protocol for protecting information that uses complex cryptographic algorithms. Cracking this system is extremely difficult, even with the most powerful computing technology. However, scientists warn of the potential threat posed by quantum computers, which could make existing data protection methods vulnerable. If such technologies emerge, bank accounts, emails, social media conversations, and cryptocurrency wallets could be at risk.

In this context, it is important to understand how the TLS protocol functions, the features of quantum computers, and whether reliable encryption methods exist that can protect data in the face of a quantum threat. Research in quantum cryptography and new encryption algorithms can provide solutions that will ensure data security even in the era of quantum technologies.

How the TLS Protocol Protects Information

TLS (Transport Layer Security) uses key encryption to protect transmitted information. Using mathematical algorithms, human-readable data is transformed into an unreadable set of characters. Only a device with the appropriate key can decrypt this information. It is important to note that the level of security of an encryption system depends more on the confidentiality of the key than on the secrecy of the algorithm itself.

Keyed encryption in a network is divided into three main types: symmetric, asymmetric, and hybrid. Each of these methods has its own characteristics and is used in different scenarios. Symmetric encryption uses the same key to encrypt and decrypt data, which makes the process fast, but requires a reliable method of key transmission. Asymmetric encryption, in turn, uses a pair of keys: public and private, which provides a higher level of security but can be slower. Hybrid encryption combines both methods, leveraging the advantages of each to ensure maximum security and data transfer speed. Understanding these encryption types is important for choosing the appropriate technology for protecting data on the network.

Symmetric encryption involves using the same key for both encryption and decryption. This method ensures fast information processing and high operating speed, making it popular in various fields. However, it is important to remember that the security of symmetric encryption depends on the integrity of the key: if it falls into the hands of an attacker, all protected information becomes vulnerable. Therefore, effective key management and protection are key aspects when using symmetric encryption.

The TLS protocol uses the AES symmetric encryption algorithm, which is currently one of the most reliable and widespread. AES generates keys of 128, 192, or 256 bits, depending on the required level of secrecy. These keys represent long passwords that are virtually impossible to crack by brute-force. For example, a 128-bit key offers 2^128 combinations, and even with supercomputers, brute-forcing them would take approximately 150 trillion years. This level of security makes TLS and the AES algorithm crucial for protecting data in modern network communications.

AES is one of the most effective encryption algorithms for protecting files and mobile applications. It also plays a key role in securing websites, Wi-Fi networks, and VPN technologies. This encryption standard is widely used, including by US government agencies, which use it to protect classified information. Due to its high reliability and speed, AES has become the primary choice for implementing encryption in various industries, ensuring data protection and user privacy.

Symmetric encryption algorithms have the advantage of low computing power requirements for encryption and decryption processes, as well as a low impact on internet connection speed. However, their main drawback is the use of the same key on both the transmitting and receiving devices. This creates the risk of key interception by attackers, especially during transmission. In such cases, asymmetric encryption schemes, which use a public and private key pair, are recommended for increased security. This significantly reduces the risk of unauthorized access to data.

Asymmetric encryption is based on the use of a pair of mathematically related keys: public and private. The public key is used to encrypt data, while the private key is used to decrypt it. This technology provides a high level of security, since only the owner of the private key can decrypt information encrypted with the public key. Asymmetric encryption is widely used in modern data protection systems, such as email and online transactions, ensuring the confidentiality and integrity of transmitted information.

Information is encrypted using various methods and algorithms, ensuring data protection from unauthorized access. Encryption is a key element in the field of cybersecurity and is used to protect sensitive information, such as financial data, personal messages, and corporate secrets.

There are several types of encryption, including symmetric and asymmetric. Symmetric encryption uses the same key to encrypt and decrypt data, while asymmetric encryption uses a pair of keys: a public and a private key.

Data security is becoming increasingly important in today's digital world, where cyberattacks are becoming increasingly sophisticated. Using strong encryption algorithms helps protect information and maintain its confidentiality. It is also important to consider that successful data protection requires not only encryption but also key security and additional security measures.

Data encryption is an essential tool for protecting personal and corporate information, so its use should be part of a comprehensive security strategy for any organization or individual.

The key owner shares the public key with the sender of the information without worrying about its secrecy. He keeps the private key secret.
The sender encrypts their message with the public key and sends it over an insecure channel. Even if the key is intercepted, no one except the owner of the private key will be able to decrypt the data.

The private key remains confidential and is not disclosed to anyone, including the sender of the data. This ensures a high level of encryption security and protects information from unauthorized access. The security of the private key is critical to ensuring the reliability and protection of transmitted data.

Today, the RSA asymmetric encryption algorithm is one of the most reliable and widespread. It was developed by American scientists in 1977. RSA is based on mathematical operations that allow for easy encryption but make decryption extremely difficult without knowledge of the private key. This aspect makes RSA a popular choice for data security in various applications, including e-commerce and secure communications.

To create keys, two large prime numbers of 1024 bits are multiplied together. Factoring a product back into its original factors is an extremely difficult task, even for the most powerful supercomputers. This makes the encryption process secure and protects information from unauthorized access.

Breaking the RSA algorithm has become a fascinating pastime for many scientists and enthusiasts. In 1977, RSA developers encrypted the phrase "The Magic Words are Squeamish Ossifrage" using a 500-digit key and offered a $100 reward for its decryption. However, this problem remained unsolved until 1995, highlighting the complexity and resilience of the algorithm. Competition in the field of cryptography attracted the attention of researchers eager to crack this cipher, which ultimately contributed to the development of new cracking methods and improvements to existing security systems.

To crack the cipher, 600 volunteers from around the world used 1,600 computers over eight months. Ultimately, they cracked the key, spending over a thousand years of computer time. The winners donated the $100 they won to the Free Software Foundation. This event will please Richard Stallman, a strong supporter of open source software and collaboration.

In 2010, a key with a length of 232 decimal digits, equivalent to 768 bits, was successfully cracked. A decryption record was set in 2019 by French scientists, who were able to factor a key of 240 decimal digits (765 bits) into prime numbers. Initial estimates for the time required for decryption were 35 million years of computing power, but the researchers succeeded in 4,000 years. To achieve this, they used a powerful computer network combining the resources of France, Germany, and the United States. This breakthrough in cryptanalysis highlights the importance of computing power and collaborative efforts in the fields of cybersecurity and cryptography.

Today, the RSA standard with keys longer than 2048 bits is widely used in practice. Modern computers are unable to effectively crack such keys, which significantly increases the level of data security. The use of long RSA keys ensures reliable information security, making this algorithm one of the most preferred for encryption.

Asymmetric encryption has its drawbacks. The main issue is the slow generation of keys, which is associated with complex calculations. This requires significant computer resources. In contrast, symmetric encryption provides higher data processing speeds. However, secure key transfer requires a secure connection. Therefore, when choosing an encryption method, it is important to consider both speed and security.

To address these shortcomings, the TLS protocol uses hybrid encryption. This method combines symmetric and asymmetric encryption, providing a high level of security and performance. Asymmetric encryption is used for key exchange, while symmetric encryption ensures fast data transfer. This approach protects information from unauthorized access and ensures the integrity of transmitted data, making TLS a reliable choice for securing internet communications.

The sender encrypts the information being sent using a symmetric key, and then encrypts the symmetric key with a public asymmetric key. The sender sends the encrypted information and key to the recipient.
The recipient first decrypts the symmetric key with their private key, and then decrypts the transmitted information with the decrypted key.

This scheme combines the advantages of symmetric and asymmetric encryption while eliminating their drawbacks. Using a fixed-length key significantly simplifies the encryption process compared to encrypting large amounts of data. This ensures both high processing speed and a reliable level of security.

Why Quantum Computers Will Break All Internet Encryptions

Modern computers perform calculations using bits, which can take the value 0 or 1. A bit can be thought of as a light bulb: 1 means the light is on, and 0 means it is off. When performing tasks, transistor computers constantly change the values of bits - writing and deleting information to free up memory. This process takes time, and as a result, complex problems can take a long time to solve. Optimizing bit management and improving data processing algorithms are becoming important aspects for increasing the performance of modern computing systems.

Quantum computers use qubits instead of traditional bits. Qubits have the unique ability to instantly transition between states 0 and 1, as well as to be in these states simultaneously. This phenomenon is called superposition and is a basic principle of quantum physics. A qubit can be thought of as a light bulb that continues to flicker when turned off, or like Schrödinger's cat, which is simultaneously alive and dead. These properties of qubits open new horizons for computing and information processing, significantly increasing the computing power of quantum computers compared to classical ones. A qubit, with its unique properties, can exist in multiple states simultaneously, allowing quantum computers to efficiently process and analyze data. This leads to the instantaneous exhaustive search of all possible solutions. For example, cracking the RSA algorithm with 2048-bit keys would require trillions of years of continuous operation for a conventional computer. In contrast, a quantum computer with 4099 stable and error-free qubits, capable of performing a million operations per second, could complete this task in just 10 seconds. American scientist Peter Shor has developed an algorithm that makes this possible, highlighting the significant threat quantum technologies pose to modern security systems. Symmetric cryptography, being less dependent on mathematical algorithms, demonstrates resistance to attacks from quantum computers. Currently, there are no effective methods for breaking symmetric ciphers, making them reliable in the quantum era. With the advent of quantum technologies, it can be expected that simply increasing the key length will provide the necessary level of data protection. This opens new horizons for information security and confirms the importance of symmetric cryptography in the future. Currently, not only do we have a shortage of qubits, but we also lack even a single high-quality qubit that would function stably. Talking about creating a unified working system for hacking information in such conditions makes no sense, since any external influence, be it random electromagnetic noise or even the observation process, can lead to errors or data loss.

Currently, the most powerful quantum computers have fewer than 100 qubits, with an error rate of 0.6%. A key issue is consistency time, which determines the period during which qubits retain their unique quantum properties. This means that all calculations must be completed within this time. Currently, consistency time ranges from 50 to 90 microseconds, limiting the ability to perform long computational tasks. To improve qubit stability, manufacturers use extremely low temperatures, reaching -273°C. This significantly improves the performance of quantum systems and paves the way for the creation of more efficient quantum computers.

Modern quantum computers look like tall cabinets, about three meters high, largely consisting of cooling and shielding systems. The quantum chips containing the qubits are comparable in size to a thumbnail. These devices represent cutting-edge technologies that promise to revolutionize computing processes and solve problems inaccessible to classical computers.

The Advantage quantum computer produced by the Canadian company D-Wave Photo: D-Wave official website Systems

Quantum computers generally function as specialized simulators capable of efficiently solving a limited set of problems. To date, a universal quantum computer capable of handling all computational tasks has not yet been created. This limitation limits the scope of quantum technologies and highlights the need for further research in this area.

Leading companies such as IBM, Microsoft, Google, and Intel are actively involved in the development of quantum computers. These organizations are investing significant resources in research and technology aimed at creating more powerful and efficient quantum computing systems. Quantum computers promise to revolutionize computing by solving complex problems that are beyond the capabilities of classical computers.

The first two-qubit computer was built in 1998 at the University of California.
In 2001, IBM created a 7-qubit computer that implemented an algorithm for factoring a number.
In 2018, Google announced that its engineers had built a 72-qubit quantum processor with a low probability of computational errors. The company did not disclose details, but claims that it enables "quantum supremacy over conventional computers."
In December 2020, researchers from China announced that their Jiuzhang quantum computer was able to perform an operation in a few minutes that would take a conventional computer about two billion years.
And in 2021, IBM unveiled its new quantum processor with 127 qubits.

While a full-fledged quantum internet killer has not yet been created (the only exception is the "Pied Piper," which was removed by developers), technology continues to advance rapidly. Google predicts that powerful and cost-effective universal quantum computers will be on the market by 2030. This heralds significant changes in the field of information security and computing technologies, which may impact existing data protection systems. Quantum technologies are opening up new horizons, and their implementation could radically change the approach to internet security.

Quantum technologies will find application in developing drugs to treat serious diseases, creating new materials with unique properties, and solving other significant problems facing humanity. Information security is also important to consider; new quantum methods for ensuring this can be expected to emerge by this time.

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Cybersecurity: How the Internet Protects User Data

Contents:

How the TLS Protocol Protects Information

Why Quantum Computers Will Break All Internet Encryptions