2fa key

When using windows to manage linux servers, SecureCRT, Xshell, and open-source putty are usually used. Most of my work environments use password authentication for logon. Today I learned some SecureCRT key logon methods. Compared with password authentication, using key authentication for Logon has the following advantages:1. Public Key Authentication allows empty

This article mainly introduces the use of generated public key in PHP, the private key to encrypt the decryption method, interested in the friend's reference, I hope to be helpful to everyone. When the PHP server interacts with the client and provides an open API, it is often necessary to encrypt the sensitive part of the API data transfer, at which point RSA Asymmetric encryption can be used, and an examp

Oracle FOREIGN KEY constraints A FOREIGN key constraint is defined as having a record of another table to constrain itself. Another table here is the main table. When the record of the primary table is deleted, we can delete the record (on delete CASCADE) with the main table, or the corresponding field is set to null (on delete set null), or the deletion is not allowed (default). A) Note:

If the database uses multiple fields instead of just one as the primary key, that is, the Federated primary key, this time you can use Hibernate to provide a federated primary key generation strategy.Specific as follows:You can use a component as an identifier for an entity class. Your component class must meet the following requirements: It must implem

Defining Data Tables If a computer manufacturer, its database is stored in the machine and accessories product information. The table used to keep the whole product information is called a Pc, and the table used to hold the information of accessory supply is called parts. There is a field in the PC table that describes the CPU model used by the computer; There is a field in the Parts table that describes the model of the CPU and we can think of it as a list of all the CPU models. Obviously,

Summary of InnoDB foreign key usage and InnoDB Key Usage USE 'wfc _ database'; # ALTER table 'app' ENGINE = INNODB for the master TABLE (also known as the referenced table, referenced TABLE, and outTable; # ALTER table 'app _ version' ENGINE = INNODB from a TABLE (also called a reference table, External TABLE, and referencing table; # One [application] can have multiple [Application versions] # therefore, t

What is 3,601 key root 3,601 Key Root is one of the highest success rate, support mobile phone models of the most secure one-button root tool, support Samsung, Sony Ericsson, MOTO, HTC, LG, ZTE, Huawei, Millet and other cover all models of a key root tool, providing the most perfect mobile root rights solution, help you get permission to remove unnecessary appli

A field that defines a unique constraint cannot contain duplicate values, and you can define a unique constraint for one or more fields, so unique can be defined at the field level or at the table level.You can include null values on fields that are uniqued constrained. Note that you can include null valuesOracle automatically establishes a unique index and a NOT NULL constraint for a field with a PRIMARY KEY constraint (the primary Code field), which

Eclipse alt+/Shortcut key method to resolve eclipse use time is not long, see a lot of fast code writing method, but alt+/this method to me how to invalidate it?Especially often used to System.out.println (), many articles are said to input sysout and then press alt+/can be automatically converted, but I how to test all invalid, looking for information everywhere .... The usual reason is that because of the conflict of shortcut keys, the default short

Tags: Way field operations BSP relationship optimizes access to different database servicesToday listened to a corporate technical director of the preaching, the results heard in his development system in the process, did not use the foreign key, which surprised me, hurriedly search the Internet for some information to see, and finally understand the reasons for the use of foreign keys.This is a discussion about the use of foreign keys, which makes se

[Email protected]> CREATE TABLE emp_1 as SELECT * from EMP; --Schedule table created.[Email protected]> CREATE TABLE dept_1 as SELECT * from dept; --table created for main tables.[Email protected]> ALTER TABLE dept_1 add constraint pk_dept_1 primary key (DEPTNO);--primary table Add primary KEY constraint table altered. [Email protected]> ALTER TABLE emp_1 add constraint fk_emp_1 foreign

Public and private keys are commonly known as asymmetric encryption methods, which are improved from the previous symmetric encryption (using usernames and passwords. I will describe the principles by email. The public key and private key are used to secure emails:1. The content I sent to you must be encrypted and cannot be seen by others during Email transmission.2. You must ensure that the email is sent

Document directory Code for obtaining the primary key generatedkey. Java JDBC obtains strong primary keys generated by the databaseHttp://blog.csdn.net/microtong In actual development, the primary keys of tables in the database are often generated by the database. When the insert statement inserts data, fields other than the primary key are inserted. In many cases, after the insert statement is submit

Key Control Motor display speed, key motor speed Program flowchart Code # Include # Define uchar unsigned charSbit dula = P2 ^ 6;Sbit wela = P2 ^ 7;Sbit jia_key = P3 ^ 6;Sbit jian_key = P3 ^ 7;Sbit zf_key = P3 ^ 5;Bit flag = 0;Uchar num = 0, show_num = 2, maichong = 4, table_begin = 0;Uchar code table1 [] = {0x01,0x02,0x04,0x08,0x08,0x04,0x02,0x01 };Uchar code table [] = {0x3f, 0x06, 0x5b, 0x4f, 0x66,

Instance Compares the key names and key values of two arrays (using a user-defined function to compare key names) and returns the difference set: Definition and usage The ARRAY_DIFF_UASSOC () function is used to compare the key names and key values of two (or more) arrays a

function Array_sort ($array, $key) {if (Is_array ($array)) {$key _array = null; $new _array = null; for ($i = 0; $i PHP two-dimensional array key value ordering PHP Array_multisort () can be used to sort multiple arrays at once, or to sort multidimensional arrays based on one dimension or multidimensional. The associated key