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This involves mainly the concepts in cryptography. In general, we also have cryptography-like things in our computer, such as kerbovers, so we can leave them here for more information. I have previously written an article titled "secure login authentication Design for websites", which may not be clear enough. One reader left a message to question: "The public key is public as its name implies, who will have your public

Is it really difficult to choose between public and private keys when using public key cryptography for encryption and signature?This article is the second version, because the first version is unfortunately ...... Let's talk less and get down to the truth. It is often said that when using public key cryptography for encryption and signature, you must know whether to use the public

One, bidirectional primary Key AssociationA two-way primary key association is actually a special case of one-way one-to-one primary key associations, except for the Here also use person and Idcard to discuss, one corresponds to a unique identity card, and an identity card is the only map of a person, so this produces a two-way relationship, person's primary

Two common cryptographic algorithms in cryptography are symmetric cryptography (single-key cryptography) and asymmetric cryptography (public key cryptography ). The so-called symmetric key algorithm means that if the encryption key of an encryption algorithm is the same as that of the decryption

"Win8 is for touch screen", it seems that this is our first impression of the WIN8 system. Win8 canceled the Start menu and added a new "start" screen that lets us switch back and forth between the "desktop" and "Start" two screens, and it may not be easy for the novice to quickly find the settings and features that were once familiar. On the traditional computer, we still rely more on the keyboard operation, want to work more efficient, you may wish to master some Win8 system shortcut keys.

Des:Digital Encryption Standard. Obsolete Standard.Single key algorithm is the sender of the information using key A for data encryption, the receiver of the information uses the same key a for data decryption. The single key algorithm is a symmetric algorithm.The algorithm is good at adding/solving speed, the

The Hibernate primary key generator is used to generate the primary key for data table records. There are several common primary key generation methods.Key GeneratorPrimary key generator:First, we will introduce several common primary key generators:1) IncrementIncrement: ge

primary KEY (Primary key) each of the data in the table is a unique value in the form. Other words. It is used to uniquely identify each row of data in a table.The primary key can be a field within the original data. Or a man-made field (a field that has no relation to the original data). A primary key can include one

JavaScript has 3 event handles in the input state of the corresponding keyboard: KeyDown, KeyPress, and KeyUp. The corresponding meaning is: The key is pressed (press the button but has not been lifted), click the button (press and lift the button), press the key to lift (after the key) Classification of keys Keys can be divided into "real" and "virtual" Real

First, what is the primary key, foreign keyThere are several properties in a record in a relational database if one of the attribute groups (note thatGroup) can uniquely identify a record the attribute group can be a primary keyLike whatStudent Table (School number name sex Class)Each student's school number is the only school number is a primary keyCurriculum (course number, course name, credits)Where the course number is unique, the course number is

The primary key and foreign key are the adhesives that organize multiple tables into a valid relational database. The primary key and foreign key design have a decisive impact on the performance and availability of the physical database. The database mode must be converted from the logical design to the physical design

The primary key task is to help MySQL determine the location of a specific data record in the data table as quickly as possible. The primary key must meet the following two conditions: 1. The primary key must be unique. The primary key fields in any two data records cannot be the same. 2. The primary

The primary key and foreign key are the adhesives that organize multiple tables into a valid relational database. The primary key and foreign key design have a decisive impact on the performance and availability of the physical database. The database mode must be converted from the logical design to the physical design

Simple tutorial on SQL statements in linux --- primary key, foreign key, and SQL Primary Key)Each item in is a unique value in the table. In other words, it is used to uniquely identify each row of data in a table. A primary key can be a column in the original data, or a column created by a person (a column irrelevant

MySQL primary key auto-generated table design MySQL has many primary key generation strategies, and one of the most common is auto-generated. In general, the primary key type is bigint UNSIGNED, and the keyword that automatically generates the primary key is auto_increment.CREATE TABLE Stock (id BIGINT UNSIGNED NOT nul

Mysql -- foreign key (froeign key), mysql -- froeign If a field of an object points to the primary key of another object, it is called a foreign key.The object to be pointed to is called a primary object (a primary table) or a parent object (a parent table ).The entity to which the sub-Table directs is called a sub-table) Purpose:Used to constrain entities in a

Mac OS X keyboard logo, shortcut key, switch operation key, screenshot capture tool Mac keyboard logo explanation ------------------------------------------------- (Command key)-on some Apple keyboards, this key may also contain the Apple logo () control Key) (Option

Rotten mud: Learning ssh key portable, ssh key This article is written by Xiuyi Lin FengProviding friendship sponsorship, first launched in the dark world In the previous article, "Learn ssh without password", we explained how to use an ssh key to log on to the server without a password. This article explains how to carry generated keys with you. For detailed

SSH key to use the non-symmetric encryption RSA algorithm, about the RSA algorithm, the following blog has a detailed description:Http://www.ruanyifeng.com/blog/2013/06/rsa_algorithm_part_one.htmlHere are just a few key points to describe the creation of the secret key: Randomly select two large prime numbers p and Q,p is not equal to Q, calculate N=PQ.