I believe everyone should be familiar with blockchain technology, and today we will take a look at what issues we need to pay attention to in the field of blockchain technology security. Let’s start today’s The main content. Currently, most blockchain projects carried out within enterprises are so-called "private blockchains with permissions." Unlike public blockchains, private blockchains can only be accessed by a selected group of users who have the authority to enter, verify, record, and exchange data on the ledger. Of course, such a network would be nearly impossible to break for an "outsider" who has never been allowed to join. But with the emergence of private chains, another question arises: In order to improve privacy and security, do we really need to abandon decentralization? Mike Orcutt from MIT Technology Review wrote that private A chain system "might make its owners feel more secure, but it really just gives them more control, meaning they can make changes regardless of whether other network participants agree." Such systems require Propose a balancing mechanism to grant different levels of permissions to different user groups and perform identity checks on validators to ensure they are who they claim to be. That’s why many companies are looking for a way to have both—the decentralization of a public chain and the extra security of a private chain. Consortium chains developed by major vendors such as IBM, Corda, and Ripple currently appear to be good security options. Simply put, they provide businesses with access to centralized systems that themselves have a level of cryptographic auditability and security. Other enterprises are also considering how to adapt public chains to meet their security needs. For example, the Ethereum blockchain already provides mechanisms that can be leveraged to ensure the privacy of network participants, including ring signatures, stealth addresses, and storing private data on the public chain. Overall, the blockchain field is moving steadily toward new solutions that define technology-granular privacy layers for public, private, and consortium blockchain networks. IT Training/Discovery Companies are actively investigating and patching known vulnerabilities and implementing new mechanisms to ensure that all parties are protected and that no malicious hacker can break through and exploit vulnerabilities in the ledger.