How to use Go language to implement a globally unique blockchain identity

Blockchain is a decentralized distributed ledger technology. As its application fields continue to expand, how to ensure the identity security of blockchain participants has gradually become a hot topic. This article will introduce how to use Go language to implement a globally unique blockchain identity.

1. Why blockchain identity is needed

In the existing Internet world, identity verification is a very important issue. Through user name and password, users can log in to our website and use our services. However, on the Internet, authentication has many security flaws, such as password leaks and fraud. In order to solve these problems, a new identity verification method has emerged - blockchain identity. It can fundamentally change our existing authentication model, making the identity truly unique and non-tamperable, and avoiding the single point of failure problem of centralized servers.

2. Use Go language to implement blockchain identity identification

Go language is an open source programming language developed by Google. It is characterized by simplicity, efficiency, and concurrency security. Developers of the Go language can take advantage of its excellent concurrency features to easily implement blockchain identity.

1. Create the basic framework

First, you need to create a basic framework for blockchain identity, which contains the following four types:

type User struct {

ID        int
Name      string 
Publickey string
Password  string

}

type Transaction struct {

From     int 
To       int 
Amount   int 
Time     time.Time 
Hash     []byte
Sign     []byte 

}

type Block struct {

Index        int 
Timestamp    time.Time 
Transactions []Transaction
Hash         []byte
PrevHash     []byte 
Nonce        int 

}

type Chain struct {

Blocks []*Block

}

2. User registration and authentication

Users need to provide their identity information, including user name and public key and encrypted password. We can implement user registration through the following code:

func (c *Chain) Register(name string, publickey string, password string) {

user := &User{len(c.Blocks), name, publickey, crypto.Hash(password)}
c.Blocks[len(c.Blocks)-1].AddTransaction(Transaction{-1, user.ID, 1, time.Now(), nil, nil})

}

In order to verify the user For identity, we can use something similar to OAuth to store the verification results in a token and return it to the user. When validating, we only need to check whether the incoming token corresponds to the user's stored token.

3. Generate blockchain identity

Before creating a blockchain identity, you need to consider how to protect the user's identity information. To maintain decentralization, all identity information should be stored locally rather than on a centralized server. At the same time, we need to protect user information through appropriate encryption algorithms to avoid information leakage and tampering.

We can use the following code to generate the blockchain identity:

func (c *Chain) GenerateID() string {

block := c.Blocks[len(c.Blocks)-1]
sum := sha256.Sum256([]byte(fmt.Sprintf("%v", block)))
return hex.EncodeToString(sum[:])

}

In When generating an identity, we need to use all known data (including the hash of the previous block, the current timestamp, and some other information) and generate a unique hash value through a hashing algorithm.

3. Summary

It is very challenging to achieve a globally unique blockchain identity. During the development process, we need to fully consider security and decentralization features. By taking advantage of the concurrency and efficiency features of the Go language, we can easily implement a reliable blockchain identity system.

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