postgresql encryption

DotNet encryption-symmetric encryption and dotnet encryption -- Just one day before the Chinese New Year's Eve, it's close to you to go home. Some people are excited, because they will have to go through the annual installation drama in a few days, and all the parties, including relatives, friends, and students, will show off, therefore, I have to pay a year-end

PostgreSQL tutorial (18): client commands (2), postgresql tutorial VII. pg_dump: Pg_dump is a tool used to back up PostgreSQL databases. It can even perform a full and consistent backup when the database is being used concurrently without blocking access to the database by other users. The dump format generated by this tool can be divided into two types: script a

Manual PostgreSQL database initialization tutorial in windows, initialize postgresql Environment: win7 64 sp1PG: 9.3.5 1. Create the postgres user, and the password is also postgres: net user postgres postgres /add 2. Create a data directory under the root directory of the database: C:\Program Files\PostgreSQL\9.3>md data 3. Remove the administrator permission on

Java encryption algorithm--MD5 encryption and hash hashing with secret key encryption algorithm source code Recently learned encryption algorithm knowledge, using MD5 encryption, Baidu a lot of online data, not very detailed, here on how to implement the MD5

Symmetric encryption and asymmetric encryption, asymmetric encryption What is encryption? Encryption is divided into two parts: algorithm and key. The algorithm remains unchanged, and the key changes. For more information, see the following example. Key: abcedfgh-> 12345678.

PostgreSQL tutorial (1): Detailed description of data tables and detailed description of postgresql I. Table definition: For any relational database, tables are the core and basic object units of data storage. Now let's start from here.1. Create a table:Copy codeThe Code is as follows:Create table products (Product_no integer,Name text,Price numeric);2. delete a table:Copy codeThe Code is as follows:Drop ta

PostgreSQL tutorial (14): database maintenance, postgresql tutorial I. Disk Space Restoration: In PostgreSQL, the data rows deleted or updated using the delete and update statements are not actually deleted, the physical address of the old data row sets the row status to deleted or expired. Therefore, when data in a data table changes frequently, the space occupi

PostgreSQL replication cluster overview, PostgreSQL replication Cluster For pg replication, high availability, and load balancing clusters, write an overview for future reference. Pg has the following various replication-Based Cluster solutions, most of which were used, and some were not sorted out at the time. There are also many cluster configuration documents on the Internet. After this document, find a

Mac installs PostgreSQL by default, so that PostgreSQL can be accessed remotelyMac default PostgreSQL directory storage path is /usr/local/var/postgres/ in this directory, modify two files, one is postgresql.conf, one is pg_ Hba.conf, and finally a reboot.Modify Postresql.conflisten_addresses = ' * ' # Modify the configuration here to allow link

Postgresql C/C ++ API and postgresql sqlapi 1. postgresql learning uri recommendation http://www.php100.com/manual/PostgreSQL8/ http://www.php100.com/manual/PostgreSQL8/reference.html http://www.yiibai.com/html/postgresql/ [Note tips byRuiy, distinguish uri/url, service/server,There has a certain truthChillax!] Frie

2.4 Adjusting checkpoints and xlogSo far, this chapter has provided insight into how PostgreSQL writes data, in general, what Xlog is used for. Given this knowledge, we can now continue and learn what we can do to make our databases work more efficiently in both replication and single-server operations.2.4.1 Understanding CheckpointsIn this chapter, we have seen that it has been written to Xlog before the data can be elsewhere. The problem is that if

PostgreSQL tutorial (10): Performance Improvement tips and postgresql Performance Improvement 1. Use EXPLAIN: PostgreSQL generates a query plan for each query, because selecting the correct query path has a critical impact on performance. PostgreSQL itself contains a scheduler for optimal planning. We can use the EXPLA

In the previous chapters, we have understood the various replication concepts. This is not just a theoretical overview of the things that will enhance your consciousness for the next thing to be introduced, but will also introduce you to a broad topic.In this chapter, we will be closer to the actual solution and understand how PostgreSQL works internally and what replication means. We'll see what the so-called transaction log (XLOG) does, and how it w

When it comes to encryption, it's reminiscent of digital signatures, what are the two often confusing concepts?Encryption: Encryption is a way to send information in a password. Only the person with the correct key can unlock the password for this message. For others, the message looks like a series of random letters, numbers, and symbols.

Detailed description of the PostgreSQL Partition Table (partitioning) application instance, postgresql Partition Table Preface Vertical table sharding is required in the project, that is, data is split into n tables according to the time interval. PostgreSQL provides the partition table function. A partition table actually Splits a large logical table into severa

Onewget https://ftp.postgresql.org/pub/source/v9.2.4/postgresql-9.2.4.tar.gzSecond, installation:# Install dependent packagesYuminstall-y perl-extutils-embed readline-devel zlib-devel pam-devellibxml2-devel libxslt-devel openldap-devel Python-devel gcc-c++ Openssl-devel cmake-yTARZXVF postgresql-9.2.4.tar.gzCD postgresql-9.2.4./configure--prefix=/usr/local/pgsql9

Label:2.2 Xlog and ReplicationIn this chapter, you have learned that the transaction log for PostgreSQL has made all changes to the database. The transaction log itself is packaged as an easy-to-use 16MB segment.The idea of using this change set to replicate data is not farfetched. In fact, this is a logical step in the development of each relational (or even non-relational) database system. Other parts of the book, you will see in many ways how the

Label:Brief introduction We can manage the PostgreSQL database through some graphical interface management programs, such as Pgadmin, to create new objects by visual or command line, delete and edit existing objects (such as directories, schemas, tables, etc.) and access them through JDBC or ODBC. Interface operation: To open a connection to a service, select the desired service in the tree, double-click it, or use the Connect on the Tools menu.In the

When it comes to encryption, a digital signature is associated with two concepts that are often confused. Encryption: Encryption is a way to send information in a password way. Only the person with the correct key can unlock the password for this information. For other people, this information looks like a series of random letters, numbers, and symbols.

[Preface]This article briefly introduces the concepts related to encryption technology, and finally summarizes the existing encryption technology in java as well as its usage and examples. [Simple encryption] 1. Simple concept Plaintext: the information before encryption Ciphertext: Confidential Information Algorithm