Bitcoin and Bitcoin Cash: Possible scenarios for transaction repetitions
As the decentralized financial (DEFI) space continues to increase, concerns about re -attacking attacks on blockchain networks have become a growing topic of discussion. Two of the most important cryptocurrencies that have caused this debate are Bitcoin (BTC) and Bitcoin Cash (BCH). In this article, we will study possible scenarios in transaction repetitions from Bitcoin Cash or vice versa.
Understanding repeated attacks
Replay’s attack occurs when the attacker intercepts and re -transfers the pre -transaction transaction by potentially changing its condition. This can lead to unexpected consequences such as double expenses, 51% control or even funds theft.
Bitcoin: Sighash_forkid meaning
To reduce repetition attacks, Bitcoin introduced a system that requires transactions to sign using the flag sighash_forkid. This ensures that each transaction is unique and cannot be ruined. However, there are scenarios when a non -standard scripts or lack of signature verification can still lead to repeated vulnerability.
Bitcoin Cash: Unique features and scenarios
Bitcoin Cash, launched in August 2017, introduced some major changes in its protocol:
* Need Sighash_forkid
: BCH does not require transactions to sign using this flag. This means that non -standard scripts can be used without signature checks.
Increased script complexity : BCH has allowed more sophisticated script languages, including the use of arithmetic operator (+, -, \*, /) and bit operators (&). Although it has increased elasticity, it also increases the attack surface.
Possible transaction repetition scenarios
Given these unique features and scenarios:
1
Repeat attacks using non -standard scripts : As you mentioned on your question, some non -standard scripts may bypass the signature test, potentially causing repetition vulnerabilities.
- Script complexity reinforcement
: Increased use of script languages can enhance the surface of the attack, making it more difficult to re -attack.
Conclusion
While Bitcoin Cash lacks “Sighash_forkid” requirements make it vulnerable to non -standard scripts, its increased script complexity and flexibility are also factors that contribute to this vulnerability. However, it is important to note that these scenarios become possible only with certain types of non -standard scripts and without proper safety measures.
suggestions
To reduce repeated attacks on Bitcoin Cash or other cryptocurrencies:
* Introduce a stable signature verification : Make sure all transactions require a valid signature using `gyghash_forkid.
* Use secure script languages : Limit the use of sophisticated script languages to prevent vulnerabilities.
* Update software and security patches regularly : Be aware of the latest security releases to reduce possible use.
By understanding these possible scenarios and implementing stable security measures, developers can reduce the risk of repeated attacks on cryptocurrency networks.
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