Ethereum: Why is the change address for a transaction the same as the originator address?
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The paradox of Ethereum’s change address
When you run events in the Ethereum block chain, one aspect that often goes unnoticed is the change address used in every single event. In theory, it seems to be the opposite that the same change address can be used for both transmission and receipt of property. However, a more accurate study of the underlying mechanics reveals the complexity of this seemingly harmless detail.
Basics: Ethereum account structure
In Ethereum, accounts are created with the original balance of 0 ether (ETH) and receive the Genesis account address (0x …). This Genesis address is often used as an event change address. It serves as a reference point for all the following events.
Each user or contract has its own private key linked to a particular Ethereum address called “Signature Address” or “Account Address”. These addresses are created when the account is created and can be used to send and receive property.
Subject: Reentrancy -attacks and wallets
Ethereum’s core architecture in wallets play a crucial role in managing user accounts. The wallet is responsible for creating and managing private keys and carrying out shops on behalf of the owner. However, the problem with the changes in addresses is due to Reentrancy attacks.
Resentrancy occurs when an attacker utilizes vulnerability in the Ethereum agreement or in an intelligent agreement, so they can repeatedly invite the same function without knowing the context. In such cases, the interior of the wallet is manipulated, leading to unintentional events.
Change Address: Two -Eating sword
In an attempt to alleviate retention attacks, Ethereum implemented the concept of “change addresses” for transactions. This allows you to use the same change address for both sending and receiving property. However, this solution has its own limitations:
- Change address conflicts : When several users share the same private key, it is increasingly challenging to maintain a unique change address for each event.
- The complexity of wallet management : Wallet management with multiple change addresses can become difficult, especially when dealing with a large number of events.
conclusion: more complex reality
In reality, Ethereum’s change addresses are not as simple as they look. The combination of resentrancy attacks and the complexity of the wallet creates a more complex scenario than originally the eye. Although the change addresses provide an alternative to sending property, their restrictions emphasize the need for further research in this area.
In order to alleviate these problems, developers and users must be aware of the potential risks associated with the use of change addresses. A better approach may include additional security measures such as:
* Distributed wallets : Utilizing decentralized wallets that use encryption techniques to manage private keys.
* Multi -tier wallets
: implementing multi -tier wallets that require multiple signatures or approvals before the user can complete the event.
By understanding the complexities behind Ethereum’s change addresses, we can strive to create safer and more solid blockchain solutions for the future.