SuperEx Guide: SuperEx  Web3 Wallet User Guide

SuperEx Web3 Wallet is a non-custodial, decentralized multi-chain wallet, with a built-in cross-chain exchange aggregator (DEX), DeFi one-stop on-chain investment tools (Web3 earning), and a heterogeneous multi-chain aggregation trading platform (supporting Crypto, Ordinals, NFTs), as well as discovering DApps. Through the SuperEx Web3 Wallet, you can easily access over 1,000 DApp protocols, making it a true one-stop Web3 entry point.

What is a Private Key?

A private key is like a password — a string of letters and numbers that allows you to access and manage your cryptocurrency funds.

When you first purchase cryptocurrency, you're given two keys:

A public key, which works like an email address (meaning you can safely share it with others to send or receive funds), and
A private key, typically a long string of letters and numbers that must never be shared with anyone.

You can think of the private key as the password to unlock the digital vault where your funds are stored. As long as you alone have access to the private key, your funds are safe and can be managed from anywhere in the world with an internet connection.

It's commonly said: your control over the funds in your wallet depends on the ownership and control of the corresponding private key.

In blockchain transactions, the private key is used to generate the necessary signature to authorize payments, thereby proving ownership of the funds. A private key must always be kept confidential, because once it's exposed to a third party, it's equivalent to handing over all the assets protected by that key.

Note: The private key is not the same as a Keystore file, which is an encrypted version of the private key. As long as the password is strong enough, even if a hacker obtains the Keystore file, it is very difficult to crack.

Where Is the Private Key Stored?

Private keys are not stored on the network. Instead, they are generated by the user and stored in a file or a simple database — known as a wallet.

The private key stored in a user's wallet is entirely independent and can be generated and managed by wallet software without needing to connect to the blockchain or the internet.

The wallet address is generated from the private key using elliptic curve cryptography to produce a public key, which is then converted into a 42-character address starting with.

A private key is a 64-character hexadecimal string. For example: 56f759ece75f0ab1b783893cbe390288978d4d4ff24dd233245b4285fcc31cf6

Where Should You Store Your Private Key?

Just like any password, keeping your private key safe is essential. There are two main ways to manage your key:

Store it online in a crypto wallet:
For most people, the easiest option is to use a digital wallet (like those offered by Coinbase) to manage their private key.These are called "hot wallets", because the key is stored online. This makes buying, selling, or using crypto convenient — like using a credit card online.It's best to choose a wallet provider with a solid security track record and features like two-factor authentication.

Store it offline in a secure location:
Some investors choose to store their private keys offline — in a computer that's not connected to the internet, written on paper, or even memorized.This method is known as cold storage.While it can protect your key from digital theft, it also makes using your crypto much less convenient and comes with other risks (like losing the physical backup).

What is a Mnemonic Phrase?

A mnemonic phrase is a set of words generated by an algorithm to represent a private key. These words can be in English, French, Chinese, or even in a dialect familiar to the user.

The length of a mnemonic phrase is typically 12, 15, 18, or 24 words. These words are selected from a fixed word list and generated based on a specific algorithm. Therefore, users don’t need to worry that randomly entering 12 words would create a valid address.

Why Mnemonic Phrases are Important

A mnemonic phrase is the key to your crypto assets — it’s like the unlock code for your wallet. If someone else obtains your mnemonic phrase, they can easily access and transfer your assets, just like opening your wallet. Therefore, it's crucial to be extremely cautious when backing up your mnemonic phrase and ensure that only you know and store it safely.

Important Tips for Backing Up Your Mnemonic Phrase

Choose a secure backup method: It is best to write down your mnemonic phrase on paper and store it in a safe location known only to you. Avoid storing it digitally or uploading it to the internet to prevent hacking. Also, avoid using fragile or virus-prone media like USB drives.

Keep your backup safe: Make sure your mnemonic phrase backup is securely stored to prevent theft or loss. Take necessary security precautions, such as using a safe or sealed container.

Verify accuracy multiple times: Double-check the mnemonic phrase during backup to ensure it’s error-free. Even a single incorrect word can make it extremely difficult to recover the wallet later.

Treat it as a top priority: The mnemonic phrase is the key to securing your wallet and assets. Treat it with the same level of importance as your bank card PIN and take appropriate measures to store it safely for reliable future recovery.

Why Do You Need a Mnemonic Phrase?

Easy to remember: Mnemonic phrases are usually made up of simple, easy-to-remember words, making them much more user-friendly compared to complex passwords or private keys.

Convenient recovery: If you lose access to your wallet or want to restore it on a different device, the mnemonic phrase can be used to recover your private key and wallet address. All you need is the phrase—no need to manage the private key directly.

Improved security: Using mnemonic phrases reduces the need to constantly handle private keys, thereby lowering the risk of leakage. Most mnemonic algorithms also include a checksum to help verify the correct input.

Easy to back up: Mnemonic phrases are human-readable, allowing users to write them down or record them safely. Compared to backing up a private key or wallet file, this method is more intuitive and user-friendly.

Standardization and interoperability: Standards like BIP-0039 ensure that mnemonic phrases work across different wallet platforms. You can generate a mnemonic in one wallet and use it to recover your wallet in another, allowing for more flexibility in switching between wallets.