Phishing fraud is the most common method used by scammers. There are many methods, but they are always the same. They all send you a link that is confusing enough, encourage you to click, and then steal your information step by step. The key may allow you to authorize his smart contract.

In this case we only need to adhere to a few principles:

1. Do not click on links from unknown sources;

2. Do not expose your keys at any time (including so-called wallets or exchange customer service);

3. Do not authorize unknown smart contracts at any time.

In addition, there is another type of fraud that is worth noting. When transferring coins between friends, they often use some instant messaging software (WeChat, Telegram, Whatsapp) to send their own addresses, and there are many scams in this:

So, after protecting your key, will your money be absolutely safe? The world of digital currency is not that simple. I will help you reveal the truth step by step.

We all know that one of the biggest features of blockchains such as ETH is the support for smart contracts. Once you authorize a smart contract to operate your wallet, in theory, it can do things to your wallet that are within the scope of your authorization. Everything, including transferring coins to third parties.

For some DAPPs whose source codes are public and have passed audits, such as UNISWAP and PANCAKE, we authorize their smart contracts to operate your wallet. Generally speaking, it is safe because they themselves will not do evil, but it is difficult for us to guarantee it. There are no loopholes in their smart contract code.

Everyone knows that keys are very important to us, so protecting keys must start from the source.

When we generate a wallet, the wallet software will ask us to record the generated key. At this time, the first thing many beginners think of is to take a screenshot or record the key on the computer's notepad. In order to find it later, The key file will also be stored in WeChat, email, etc. This is a very, very, very incorrect approach, and the key will be leaked on the Internet in minutes.

In fact, it is very simple. You can use a notebook and a pen to record it and store it in a safe and dry place. Especially avoid using a piece of paper to record it. It may be thrown away as waste paper one day... ··

There are thousands of digital currency wallets on the market, and they are countless. However, they can be said to be mixed, so you must keep your eyes open when choosing one. In order to make it easier for everyone to choose, I first divide wallets into two categories: hot wallets and cold wallets.

The so-called hot wallet is a wallet in which the key is stored on an Internet-enabled mobile phone or computer, and can be used to authorize transfers or perform smart contract operations at any time through wallet software signatures.

This is a wallet form that everyone often uses, including Little Fox Metamask and IMTOKEN. When using a hot wallet, the first thing you should pay attention to is to download it from an app store such as the App store or Play store. It is really impossible to download it through the app store. You must also download it from the official website of the corresponding wallet.