All you need to know about Cryptography: Algorithms
With the development of technology, users around the world, as well as programmers and developers, began to face the issue of maintaining the confidentiality of information. Internet technology and hacker attacks began to threaten this direction. This is how various methods of data encryption appeared.
This article will talk about what it is, disclose the concept of cryptography, and consider the main ways in which you can protect certain data. The information provided will be useful for both experienced programmers and novice PC users.
The technique of cryptography is to secure data so that only the person who is responsible has access to the information and connects it to other data. In the past, video signals weren’t utilized to encode.
Anyone who had satellite dishes could watch videos, which resulted in the loss of satellite owners, therefore, they began encrypting video signals to ensure that only those who own video ciphers are able to decrypt the signals.
Use of Matrix in Cryptography
The encryption process is carried out using an invertible key. If the key isn’t invertible, the encrypted signals are unable to be decrypted, and they can’t return to their original state. This is accomplished with the matrices.
Video or audio signal is initially viewed as an order of numbers that represents the variations in the pressure of air in an audio signal that is acoustic. Filtering techniques are employed that rely upon matrix multiplication. The matrix multiplication calculator is available online for easy calculations and in addition, for the determinant of the matrix, you can use an online determinant calculator.
Cryptography concept
Cryptography is also often called cryptology. This is the art of transmitting information of an electronic or another type so that it would be impossible to read it without an encryption key.
The term is derived from several Greek words:
- kryptos – hidden;
- grapho – to write.
The direction of science on the compilation of encryption algorithms is one of the oldest in the world. But in modern realities, this concept has taken on completely new turns.
Furthermore, cryptography is a complex of algorithms, knowledge, and tools for protecting the confidentiality of certain information from prying eyes. And in addition, cryptanalysis is called a certain line of activity that studies the rules and methods of violating the safety of a message.
History of origin
Issues related to encryption algorithms began to be addressed in the ancient world. The options for protection, once invented by people, work to this day.
For the first time, a corresponding topic surfaced with the advent of the first written language. Previously, the following types of writing were encountered:
- hieratic;
- Demotic.
The first option was used by the clergy, the second – by everyone else. The Greeks and Romans became the “inventors” of their own secret writing systems. Namely – cursive writing. This was originally a secret letter. The “inventor” is a certain Tullius Tyro.
But only in the Middle Ages, various algorithms for the so-called encryption of messages began to be used for diplomatic purposes with enviable regularity. Also, the appropriate techniques were found in trade and military activities. And in 1499 the first book on cryptography appeared.
Modern development
Encryption algorithms have been slowly evolving and taking on a new look. The modern interpretation of these arose around 1990. In those days, the active development of information technology began.
Various countries have started to come up with their own cryptographic protocol standards.
Examples:
- America – Rijndael;
- Europe – NESSIE;
- Japan – CRYPTREC.
Also, all previously existing algorithms have become much more complicated in terms of mathematical constructions. This makes cryptanalysis difficult. New requirements, often not related to mathematics, have led to the fact that encryption methods are now as robust and complex as possible.
Furthermore, directions in cryptography began to appear, which are at the intersection of mathematics and quantum computing.
Where is it applied?
Digital services must necessarily worry about the safety of users and archived information. Otherwise, data leakage is fraught with serious consequences. For example – hackers will be able to use the received electronic materials from a particular project for their own selfish purposes.
Today, almost all important aspects of human life and activities depend on information technology and gadgets. Financial transactions, as well as all kinds of payments and even work, are carried out through mobile technologies.
They can hardly be called secure channels for the transmission of electronic materials. Therefore, you have to think about how best to organize the protection of information.
Information encryption algorithms are used everywhere:
- TV;
- computers;
- Internet technologies;
- programming;
- radio communication;
- other communications;
- banking.
Wherever information technology appears and digitalization is present, cryptography is involved. This scientific direction is very complex but promising.
