In cryptography, the original message that needs to be converted is called plaintext pipe network. Cryptography is the foundation of network security, information security, blockchain and other products. Common products include asymmetric encryption, symmetric encryption and hash function.
Clear text. Plain text refers to the original message or information that is not encrypted. It can be a paragraph of text, numbers, images, sounds and other forms. In cryptography, in order to protect the security and confidentiality of information, plaintext is encrypted and converted into ciphertext.
In cryptography, the source information is usually called (plaintext) and the encrypted information is called (ciphertext). This conversion process is called (encryption process), and its reverse process is called (decryption process).
According to these laws, changing plaintext into ciphertext is called encryption transformation; Turning ciphertext into plaintext is called decryption transformation. In the early days, passwords only changed the encryption and decryption of characters or numbers. With the development of communication technology, voice, image and data can be encrypted and decrypted.
The sender of confidential messages must come up with a systematic method to deal with the message context, and only the receiver can decipher it. Confused information is called ciphertext. Cryptography In the Internet age and the digital age, the goal of cryptography remains unchanged: to prevent the information exchanged by both parties from being stolen by opponents.
Cryptographic protocols are equally important and are two major topics in cryptography research. In English, cryptography and cryptography can both represent cryptography, and the former is also called cryptography.
Absolute encoder principle
Incremental encoder is a magnetic pole pair with one turn (column), and it is definitely a magnetic pole pair with two turns (2 or 3 columns). The non-Neuss principle of vernier caliper realizes the absolute measurement of single lap position.
Absolute encoder adopts natural binary or cyclic binary (Gray code) for photoelectric conversion. The difference between absolute encoder and incremental encoder lies in the light transmission and light transmission line pattern on the optical disc. The absolute encoder can have multiple codes, and the absolute position can be detected according to the codes on the code wheel.
Absolute encoder: The encoding is determined by the mechanical position. It doesn't need to remember, find a reference point, and keep counting. When you need to know the location, you can take a look.
Among them, the output of the original pulse number is non-directional, which requires the electronic circuit in the encoder chip to judge and count, and finally outputs positive and negative values to represent the rotation direction and angle.
The absolute value of the encoder conforms to PROFIBUS protocol, the order number is 062, and the operation is based on Class 1 and Class2. For the encoder based on Class 1, the position value and diagnostic data are available in bytes 1... 16.
If you want to measure more than 360 degrees of rotation, you need to use a multi-turn absolute encoder. Encoder manufacturers are looking for Shanghai Katie electronic encoder options.
In a cryptographic system, plaintext refers to
1, plaintext: plaintext refers to unencrypted text (or string), which can be understood by ordinary people and belongs to cryptography terminology. In a communication system, it can be a bit stream, such as text, bitmap, digitized voice or digitized video image.
2. Common cryptographic systems include plaintext, ciphertext, key, encryption algorithm and decryption algorithm. Clear text: refers to the unencrypted text (or string) that ordinary people can understand, belonging to cryptography terminology; Ciphertext: Ciphertext is the encrypted text, and plaintext is the text before encryption.
3. plaintext password: plaintext password can be directly understood, such as 123456, abcd, etc. Instead of being encrypted, * * * is a relative cipher text, such as abc stands for 123. If you only know 123 and don't know the decoding rules, you can't translate the real password 123.
4, plaintext password, that is, the password transmitted or saved in plaintext. Specifically, when saving passwords or transmitting passwords through the network, use plaintext characters that are directly displayed without hiding, instead of encrypted ciphertext. In contrast, it is a ciphertext password.
5. Different definitions of plaintext refer to unencrypted words (or strings) that ordinary people can understand. In a communication system, it can be a bit stream, such as text, bitmap, digitized voice or digitized video image. Ciphertext is encrypted text, and plaintext is encrypted text.
The technology of converting plaintext information into an unbreakable or difficult ciphertext is called (). Modern cryptography ...
1. The technology of deciphering passwords is called cryptanalysis, and the main research content is how to decipher cryptographic algorithms. Cryptography and cryptanalysis constitute cryptography.
2. Cryptography mainly includes encryption and decryption. Generally, understandable messages are called plaintext, and incomprehensible messages converted by plaintext through encryption are called ciphertext. This process is called encryption. The process of converting ciphertext into plaintext by inverse transformation is called decryption.
3. Password is an important secret means for communication parties to convert special information according to agreed rules. According to these laws, changing plaintext into ciphertext is called encryption transformation; Turning ciphertext into plaintext is called decryption transformation.
What are the two opposite branches of cryptography?
1, extended data cryptography and cryptanalysis are two opposite branches. Modern cryptography studies the secure transmission and storage of information from the initiator to the receiver, which is a science of "knowing yourself and knowing yourself". Its core is cryptography and cryptanalysis.
2. Cryptography and cryptanalysis. According to Sohu. Com, the cryptographic system is at least composed of plaintext, ciphertext and encryption algorithm, including cryptography and cryptanalysis. Cryptography mainly studies secure cryptographic algorithms and protocols to realize information encryption protection or message authentication.
3. Cryptography mainly includes two branches: cryptography and cryptanalysis. The main purpose of cryptography is to find ways to ensure information confidentiality or kernel shaping, and the main purpose of cryptanalysis is to study the decoding of encrypted messages or the forgery of messages. Cryptography has experienced the evolution from ancient cryptography to modern cryptography.
4. Cryptography is divided into coding and cryptanalysis. Cryptography mainly studies the coding of information and realizes the concealment of information. Cryptanalysis mainly studies the decoding of encrypted messages or the forgery of messages. They are independent and interdependent, developing in the struggle of contradictions and in the unity of opposites.
What is the process of turning plaintext into ciphertext?
1, the process of converting plaintext into ciphertext is called encryption, and the process of restoring ciphertext into plaintext through inverse transformation is called decryption. Generally speaking, after the password is manually encrypted, the transmitted direct information is encrypted, which is called "ciphertext".
2. Under the control of the key, the process from plaintext to ciphertext is called encryption, and the opposite process is called decryption or decryption. In cryptographic systems, besides legitimate users, there are also illegal interceptors who try to steal secrets (also known as passive attacks) or tamper with messages (also known as active attacks) by various means.
3, or messages that can be obtained through some open coding standards. After the encryption algorithm, the text is called ciphertext. For ciphertext, if we want to get plaintext, we must decrypt it through the decryption algorithm corresponding to the encryption algorithm to recover plaintext.
4. Decryption is another main function of cryptography, which refers to the process of converting ciphertext into plaintext through some algorithm. Decryption needs to be operated with the correct key, otherwise the plaintext cannot be restored correctly. Symmetric decryption algorithm uses the same key for encryption and decryption, so decryption also needs to use the correct key.
5. Encryption is the process of changing "plaintext" into "ciphertext"; Similarly, the process of changing "ciphertext" into "plaintext" is called decryption. [Question 3: What do you mean by revealing the secret? Interpretation: reveal the secret. This historical case has yet to be solved. Please use stp insulation engineering.