Multi Signature refers to the need for multiple keys to authorize a digital currency transaction, which is often used to define ownership of a digital currency. In a traditional digital asset account, each address in your digital currency address has a corresponding private key, which can be called a "single signature transaction". Multi-signature addresses, on the other hand, can have multiple associated private keys, more of which you need to complete a transfer.
Import wallets into NAS nano pro with wallet backup information (mnations, Keystore, private keys) from the original NAS nano, and never delete wallets and original NAS until the import is complete.

Manage private keys
Multisigation is the use of multiple keys that involve three or more entities to allow the flow of funds to authorize encrypted transactions. By spreading private keys across different storage solutions, combining cold storage with multiple users has become standard practice for institutional encryption security.
Kevin Rose says he recommends that users be "highly alert" to the import of private keys and rely on uniform declarations published by primary network nodes.
Enable: It is safe to import private keys and votes from the Block Producer community in a joint statement. Voting begins.
In another example, a private key is equipped with multiple public keys that are used to unlock different functions, such as auditing and authorization.
Note here that, like physical wallets, which can hold multiple bank cards, Bitcoin wallets can store multiple Bitcoin addresses, each with a separate private key. Bitcoin private keys are used to protect your wallet, and if the private key is lost, your bitcoins will never be recovered.
Problems with Private Keys.

Like Bitcoin, both are decrypted with the recipient's private key, but with Bitcoin, bitcoin can only be encrypted with the recipient's public key, while Monroe Coin's ring encryption feature uses multiple public keys to encrypt keys to hide critical information.
(or multiple) private keys are signed at the same time before they can be traded. Usually a private key user saves, one to the server, if only the server private key is stolen, the hacker does not have the local private key, transactions can not be signed. The mechanism for multiple signatures is more complex.
You can import wallets by importing mnupations, private keys, and wallet files that support the old address format, and automatically display the addresses in the new format after the import is complete.
Test network performance optimization. Optimize multi-chain address generator, optimize data accounts to improve reading and writing speed, optimize import and export private keys, improve block reward mechanism, reconstruct consensus code, etc.
Remembering only 12 today phrases allows you to generate wallet files, passwords, multiple private keys, multiple public keys, multiple collection addresses at Electron Cash, so 12 phrases are the lifeblood of your wallet, the equivalent of being in control of multiple bank cards.
Bitcoin wallets contain only private keys, not bitcoins. Each user has a wallet with multiple private keys. The wallet contains pairs of private and public keys. Users use these private keys to sign transactions, proving that they have the output of the transaction (that is, bitcoins in them). Bitcoin is stored in the blockchain in the form of transaction output (usually recorded as vout or txout)

Multiple authenticator keys.
Create/import wallets, be sure to protect your private keys and monemone words, and keep your assets safe.
Another consequence of using a wallet within a Dapp is that if a user wants to access EtherDelta from multiple devices (or even multiple browsers on the same device), they must import their own private key. Anyone who enters private keys when a hacker controls Ether Delta should assume that they have been compromised.
I do the same thing as you do - back up, export private keys and try to import them into blockchain, bitcoinqt, electrum, armory, etc. But to no avail.
and Android system. Installing Electrum requires you to write down a 12-word seed to help you recover your wallet on multiple devices. If you forget your private key, this seed can also make Electrum look more human. In addition, Electrum has a "cold storage" mode where you don't have to pay Bitcoin to view your balance.
You can import and export TRON, BCH, LTC wallet private keys

The Wallet Import Format is an error-correcting and shortened format for private keys. Most of the private keys you encounter use WIFI, typically 52 characters long, while the local private key uses 64 hex characters. Web Wallet and Core Wallet provide the private key as WIFI, which allows the wallet address to be recovered from the WIFI private key.
A secure tool for exporting BTC wallet private keys via mnemone (electrum wallet used in this article is a third-party wallet tool used in small compilation testing, users can choose their own tools according to the actual situation, please note wallet security when selecting)
In an EOS system, each account has more than two private keys corresponding to it, but multiple private keys can be the same. For example, an EOS account is imtokensimon, the owner private key of this account is 123, and active's private key can be set to 123 or 456.
Multiple private keys have the account's user and active permissions, which are extremely risky.
In addition to sending and receiving cryptocurrencies, the latest hardware wallet product will also include multiple uses, the company said. "It is an infrastructure technology with multiple applications," Sony added in a press release. This IC-card-style cryptocurrency hardware wallet technology can manage not only the private keys used for cryptocurrency transactions, but also private keys for other purposes, such as those that allow the use of personal information through blockchain technology. "
For security reasons, our test network does not require users to import their Ethereum private keys and then recover them through recovery tools. If your EOS private key is compromised during testing, you can register a new key on the Ethereum network at any time.
Determinative tiered wallets: There is a primary private key that allows you to produce private keys in all other currencies and support multiple accounts.
In August-September, Bitcoin wallet Electrum was hacked twice, and according to multiple sources, at least 1,450 BTCs worth $11.6 million were stolen from phishing attacks that faked Electrum upgrade tips.
When using distributed private keys to build permission relationships, this set of distributed private keys does not correspond to a user, but the distributed private keys in distributed private keys correspond to multiple participants in the actual business application, thus constructing the relative permission relationship between participants in the business application by the above logical relationship.