QT add BTC private key
Publish: 2021-05-21 22:06:01
1. Select the export private key in the settings, and then select the export folder
2. It depends on whether the wallet has the function of automatic collection. If it is not open, it can't be withdrawn. However, bitcoin cash has been born for a long time, and it can't be withdrawn
on August 1, 2018, bitcoin carried out a hard bifurcation to proce BCH. BCH is the result of community division, not a kind of bifurcated coin. BCH has its own strong community support. However, at that time, some wallets did not support BCH to collect.
on August 1, 2018, bitcoin carried out a hard bifurcation to proce BCH. BCH is the result of community division, not a kind of bifurcated coin. BCH has its own strong community support. However, at that time, some wallets did not support BCH to collect.
3. Modifying G + + compiler with QT Creator
4. Lightcoin and bitcoin are the same. They can be obtained through computer mining. What you said about sharecoin seems to be NMC media chain. I don't know the details
5. The wallet file downloaded from bitcoin QT client is wallet.dat, and the wallet file downloaded from multibit client is multibit.wallet. The file name, size and format of these two files are different, so how to switch? If you don't need to save the original address, send the coin directly to the multibit address
6. The importance of private key security is self-evident compared with special coin players. For bitcoin heavyweight players or bitcoin merchants, how to protect the private key needs careful consideration and repeated consideration. Today, the editor will discuss with you how to protect the private key of bitcoin. For bitcoin QT clients, the bitcoin private key is generally stored in the client's wallet.dat file. For online wallet users such as blockchain, the private key of bitcoin is stored on the network server of online wallet, and users can also download the private key locally. For users of paper wallets, the private key can be printed. However, how to protect the security of the private key? The editor lists several methods for your reference
keep the private key with symmetric encryption. Symmetric key algorithm means that both encryption and decryption use one key. The encryption methods we usually use are symmetric encryption, such as WinRAR encryption, bitcoin QT encryption of the private key file is also using the symmetric encryption algorithm. The commonly used symmetric encryption algorithms are AES, DES, RC4, RC5 and so on. Symmetric encryption requires users to set relatively complex keys to prevent brute force cracking. Go to top method 1 uses bitcoin QT to encrypt the private key wallet. In the command mode, we can use the encryptwallet command to encrypt the wallet. For the usage of command mode, please refer to the basic teaching of bitcoin: how to use the private key of paper wallet. This is the most simple and effective method of private key encryption. However, when the walletpassphrase command is used to decrypt the wallet, the key will be read into the computer memory, so it is possible for the attacker to obtain the key. Encryption command: encrypt wallet yourpassword decrypt wallet command: walletpassword yourpasswordtimeout change password command: walletpassword exchange oldpasswordnewpasswordgo to top method 2, use AES encryption provided by blockchain. Blockchain provides users with private key file encryption service based on AES algorithm. Users can download the encrypted file and save it properly
go to top method 3 uses TrueCrypt, a third-party software, to encrypt the key file, which is also recommended by the editor. TrueCrypt is open source and free, with high software maturity, and supports two factor authentication and whole hard disk encryption. In addition, FBI personnel have suffered losses on TrueCrypt, so they have a good reputation. The FBI has admitted defeat in attempts to break the open source encryption used to secure hard drives seized by Brazilian police ring a 2008 investigation.
the bureau had been called in by the Brazilian authorities after the country's own National Institute of Criminology (Inc) had been unable to crack the passphrases used to secure the drives by suspect banker, Daniel Dantas.Brazilian reports state that two programs were used to encrypt the drives, one of which was the popular and widely-used free open source program TrueCrypt. Experts in both countries apparently spent months trying to discover the passphrases using a dictionary attack, A technique that involves trying out large numbers of possible character combinations until the correct sequence is found. Users who use it must keep the key in mind. If you forget the key, no one can recover your encrypted files
TrueCrypt, the official website of TrueCrypt, uses the asymmetric encryption method to keep the private key of the document. The asymmetric encryption method uses the form of public key and private key to encrypt the file. Users can encrypt files with public key and decrypt files with private key. Common asymmetric encryption algorithms include RSA, ElGamal, ECC and so on. The advantage of asymmetric encryption is that the complexity of the key is generally very high, which can effectively prevent violent cracking. The disadvantage is that there is a certain threshold, which is not suitable for ordinary users. Go to top method 1. Indivial users can consider using RSA for encryption. First, you can create a public key and a private key. Click here to generate the key. After keeping the public key and private key properly, you can encrypt and decrypt with the public key. Click here to encrypt and decrypt. RSA public key and private key generation process RSA public key and private key generation process randomly choose two large prime numbers P and Q, P is not equal to Q, calculate n = PQ. According to Euler function, R is obtained= φ( N) = φ( p) φ( q) = (p-1) (Q-1) select an integer E which is less than R and obtain the mole inverse element of e with respect to mole R, named D If and only if e and R are coprime, the records of P and Q are destroyed N. E) is the public key and (n, d) is the private key. Second, we can use PGP (pretty good privacy) tool to encrypt files. PGP encryption allows each public key to bind to all information of a user. Compared with RSA, the function of PGP is more perfect and reliable. However, with the upgrade of Pgp, new encrypted messages may not be decrypted by the old PGP system, so users should be familiar with PGP settings before using PGP. There are many PGP encryption tools on the Internet, so the editor will not list them
Introction to Pgp in Wiki PGP online encryption and decryption system PGP command FAQ advanced method to keep the private key. The above ways to keep the private key are very common. An experienced attacker may still get the user's private key file. For more advanced private key storage methods, please refer to the advanced teaching content of bitcoin in the future.
keep the private key with symmetric encryption. Symmetric key algorithm means that both encryption and decryption use one key. The encryption methods we usually use are symmetric encryption, such as WinRAR encryption, bitcoin QT encryption of the private key file is also using the symmetric encryption algorithm. The commonly used symmetric encryption algorithms are AES, DES, RC4, RC5 and so on. Symmetric encryption requires users to set relatively complex keys to prevent brute force cracking. Go to top method 1 uses bitcoin QT to encrypt the private key wallet. In the command mode, we can use the encryptwallet command to encrypt the wallet. For the usage of command mode, please refer to the basic teaching of bitcoin: how to use the private key of paper wallet. This is the most simple and effective method of private key encryption. However, when the walletpassphrase command is used to decrypt the wallet, the key will be read into the computer memory, so it is possible for the attacker to obtain the key. Encryption command: encrypt wallet yourpassword decrypt wallet command: walletpassword yourpasswordtimeout change password command: walletpassword exchange oldpasswordnewpasswordgo to top method 2, use AES encryption provided by blockchain. Blockchain provides users with private key file encryption service based on AES algorithm. Users can download the encrypted file and save it properly
go to top method 3 uses TrueCrypt, a third-party software, to encrypt the key file, which is also recommended by the editor. TrueCrypt is open source and free, with high software maturity, and supports two factor authentication and whole hard disk encryption. In addition, FBI personnel have suffered losses on TrueCrypt, so they have a good reputation. The FBI has admitted defeat in attempts to break the open source encryption used to secure hard drives seized by Brazilian police ring a 2008 investigation.
the bureau had been called in by the Brazilian authorities after the country's own National Institute of Criminology (Inc) had been unable to crack the passphrases used to secure the drives by suspect banker, Daniel Dantas.Brazilian reports state that two programs were used to encrypt the drives, one of which was the popular and widely-used free open source program TrueCrypt. Experts in both countries apparently spent months trying to discover the passphrases using a dictionary attack, A technique that involves trying out large numbers of possible character combinations until the correct sequence is found. Users who use it must keep the key in mind. If you forget the key, no one can recover your encrypted files
TrueCrypt, the official website of TrueCrypt, uses the asymmetric encryption method to keep the private key of the document. The asymmetric encryption method uses the form of public key and private key to encrypt the file. Users can encrypt files with public key and decrypt files with private key. Common asymmetric encryption algorithms include RSA, ElGamal, ECC and so on. The advantage of asymmetric encryption is that the complexity of the key is generally very high, which can effectively prevent violent cracking. The disadvantage is that there is a certain threshold, which is not suitable for ordinary users. Go to top method 1. Indivial users can consider using RSA for encryption. First, you can create a public key and a private key. Click here to generate the key. After keeping the public key and private key properly, you can encrypt and decrypt with the public key. Click here to encrypt and decrypt. RSA public key and private key generation process RSA public key and private key generation process randomly choose two large prime numbers P and Q, P is not equal to Q, calculate n = PQ. According to Euler function, R is obtained= φ( N) = φ( p) φ( q) = (p-1) (Q-1) select an integer E which is less than R and obtain the mole inverse element of e with respect to mole R, named D If and only if e and R are coprime, the records of P and Q are destroyed N. E) is the public key and (n, d) is the private key. Second, we can use PGP (pretty good privacy) tool to encrypt files. PGP encryption allows each public key to bind to all information of a user. Compared with RSA, the function of PGP is more perfect and reliable. However, with the upgrade of Pgp, new encrypted messages may not be decrypted by the old PGP system, so users should be familiar with PGP settings before using PGP. There are many PGP encryption tools on the Internet, so the editor will not list them
Introction to Pgp in Wiki PGP online encryption and decryption system PGP command FAQ advanced method to keep the private key. The above ways to keep the private key are very common. An experienced attacker may still get the user's private key file. For more advanced private key storage methods, please refer to the advanced teaching content of bitcoin in the future.
7. Generally, only QT wallet can export private key. The private key is unique and should be saved well.
8. Let's talk about the version problem
1. Ubuntu 8.10 (intrepid ibex) alternate i386 (ISO)
represents text installation, which is suitable for Intel platform
2. Ubuntu 8.10 (intrepid ibex) desktop i386 (ISO)
represents graphics installation and use version, It is also the Intel platform
3. Ubuntu 8.10 server AMD64 (ISO)
this is the server version for AMD CPU
4. Ubuntu 8.10 (intrepid ibex) server i386 (ISO) Ubuntu 8.10
the server version for Intel CPU
5. Ubuntu 8.10 (intrepid ibex) alternate AMD64 (ISO)
the text installation version for AMD CPU
the software in the Ubuntu software source is very popular Rich, no need to search around like windows software; There are many software installation tools on Ubuntu, which are easy to use. The command-line installation tools provided by the Ubuntu system include apt get, dpkg, etc., and the graphical installation tools include update manager, add and delete programs, and xinlide package manager, etc, We can easily complete the installation and upgrade of the software.
install the software we download from the Internet.
the common formats of the software installation package we download from the Internet are. DEB and tar. GZ. Generally, we can only use the command line to install.
files ending with. DEB, such as XX.. DEB, are equivalent to executable files in Windows system, For example, in the Gnome integrated desktop environment, you can directly double-click the software package, and then the gdebi graphical installation tool will be automatically started for installation. For example, in the terminal environment, you can enter the command "dpkg – I xx. DEB" to install. For deleting XX software package, you can enter the command "dpkg – r XX". "
the file ending with. Tar.gz refers to the file packed with tar command and compressed into gzip format, Such a file usually contains the source code of the software. To compile the source code, the software package build essential (including common programming tools and function libraries) is required to be installed in the system. Use the command "sudo apt get install build essential" to install the software package, We usually use the "sudo tar zxvf XX. Tar. GZ" command to unzip the file. After unzip the file, the XX directory will be generated in the current directory. Then enter the directory and enter the command "sudo. / configure" to check the system environment. If the test is passed, the compilation script will be generated. Then enter the command "sudomake" to compile, If the compilation is successful, the binary executable file will be generated in the current directory, After that, enter the command "sudo make install" to the binary executable file to the system global path or the specified directory.
tips: the command line installation tool on Ubuntu
1. Apt get command
apt get command is the most commonly used command line installation tool in the Ubuntu system, It's very convenient and quick to install software from software source by using apt get command. The parameters of apt get command are "Install" and "update". The command "sudo apt get
Update" is used to get the latest list of available software packages from software source server. After adding the address of a software source server to / etc / apt / sources.list file, the, The command "sudoapt get install
soft" allows us to download and install software online from the software source, where "soft" is the name of any application or program. To install network scanning tool nmap, enter the command "sudo
apt get
install nmap" in the terminal window, The apt get command will automatically find the latest version of nmap in the software source, and calculate the amount of data downloaded and the space required for installation. After the user confirms, the nmap software can be downloaded and installed online. To delete the package, use the command "sudo apt get remove nmap". "
2. Dpkg command
Ubuntu is developed on the basis of Debian distribution, It also supports Debian packages (files ending with. DEB), so many software installation packages on Ubuntu
are in the form of DEB packages. Dpkg (package manager for
Debian, Debian package manager) is a command-line tool for installing, creating and deleting Debian packages Suggestions for Ubuntu novices
when you don't know the specific name of the application software, use the search function provided by the installation tool or search online; When you have mastered the installation tools and software installation methods provided by the Ubuntu system, you will find that installing software in Ubuntu is also a kind of fun!
1. Ubuntu 8.10 (intrepid ibex) alternate i386 (ISO)
represents text installation, which is suitable for Intel platform
2. Ubuntu 8.10 (intrepid ibex) desktop i386 (ISO)
represents graphics installation and use version, It is also the Intel platform
3. Ubuntu 8.10 server AMD64 (ISO)
this is the server version for AMD CPU
4. Ubuntu 8.10 (intrepid ibex) server i386 (ISO) Ubuntu 8.10
the server version for Intel CPU
5. Ubuntu 8.10 (intrepid ibex) alternate AMD64 (ISO)
the text installation version for AMD CPU
the software in the Ubuntu software source is very popular Rich, no need to search around like windows software; There are many software installation tools on Ubuntu, which are easy to use. The command-line installation tools provided by the Ubuntu system include apt get, dpkg, etc., and the graphical installation tools include update manager, add and delete programs, and xinlide package manager, etc, We can easily complete the installation and upgrade of the software.
install the software we download from the Internet.
the common formats of the software installation package we download from the Internet are. DEB and tar. GZ. Generally, we can only use the command line to install.
files ending with. DEB, such as XX.. DEB, are equivalent to executable files in Windows system, For example, in the Gnome integrated desktop environment, you can directly double-click the software package, and then the gdebi graphical installation tool will be automatically started for installation. For example, in the terminal environment, you can enter the command "dpkg – I xx. DEB" to install. For deleting XX software package, you can enter the command "dpkg – r XX". "
the file ending with. Tar.gz refers to the file packed with tar command and compressed into gzip format, Such a file usually contains the source code of the software. To compile the source code, the software package build essential (including common programming tools and function libraries) is required to be installed in the system. Use the command "sudo apt get install build essential" to install the software package, We usually use the "sudo tar zxvf XX. Tar. GZ" command to unzip the file. After unzip the file, the XX directory will be generated in the current directory. Then enter the directory and enter the command "sudo. / configure" to check the system environment. If the test is passed, the compilation script will be generated. Then enter the command "sudomake" to compile, If the compilation is successful, the binary executable file will be generated in the current directory, After that, enter the command "sudo make install" to the binary executable file to the system global path or the specified directory.
tips: the command line installation tool on Ubuntu
1. Apt get command
apt get command is the most commonly used command line installation tool in the Ubuntu system, It's very convenient and quick to install software from software source by using apt get command. The parameters of apt get command are "Install" and "update". The command "sudo apt get
Update" is used to get the latest list of available software packages from software source server. After adding the address of a software source server to / etc / apt / sources.list file, the, The command "sudoapt get install
soft" allows us to download and install software online from the software source, where "soft" is the name of any application or program. To install network scanning tool nmap, enter the command "sudo
apt get
install nmap" in the terminal window, The apt get command will automatically find the latest version of nmap in the software source, and calculate the amount of data downloaded and the space required for installation. After the user confirms, the nmap software can be downloaded and installed online. To delete the package, use the command "sudo apt get remove nmap". "
2. Dpkg command
Ubuntu is developed on the basis of Debian distribution, It also supports Debian packages (files ending with. DEB), so many software installation packages on Ubuntu
are in the form of DEB packages. Dpkg (package manager for
Debian, Debian package manager) is a command-line tool for installing, creating and deleting Debian packages Suggestions for Ubuntu novices
when you don't know the specific name of the application software, use the search function provided by the installation tool or search online; When you have mastered the installation tools and software installation methods provided by the Ubuntu system, you will find that installing software in Ubuntu is also a kind of fun!
9. from http://www.taobtc.net/ The wallet file of bitcoin QT client is wallet.dat, and the wallet file of multibit client is multibit.wallet. The file name, size and format of these two files are not the same, so how to switch? If you don't need to save the original address, send the coin directly to the multibit address
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