In the past month, the digital currency has been consolidating, and everyone is also very anxious. They are all looking at whether the direction will be up or down, but now the direction is gradually clear. With the listing of Coinbase, many coins have broken new highs. After all, Coinbase can be listed. On the Laomei side, it shows the authorities' attitude towards digital currencies.

This is exactly the situation. I said that when it is really time to pick up money, I am busy going around every day, connecting with project parties and mining machine manufacturers. Yesterday, my partner in the VIP group reported to me that a big V plagiarized my article. I jokingly said, I don’t have time to sue, so don’t delay me from picking up money.

Although I said it jokingly, but now is really a good time to make money. It is really not worth the time and energy I have to sue him. I have this time, and the money I have earned is already hundreds or even thousands of times the compensation for plagiarism.

Let’s continue to talk about Crust with you. After the last talk, everyone is very enthusiastic about this project. Some partners are no longer satisfied with buying a few terabytes of computing power, and want to buy mining machines directly.

Can the Crust project succeed?

Hard to say! As I said last time, one is that the consensus is far inferior to FIL, and the second is the use of TEE technology. Although it has too many advantages over FIL in commercial use, the degree of decentralization is relatively poor. This is related to TEE technology. I will explain why this is so in detail later. Although it may not be successful, after my own research and judgment, I feel that Crust will pay back very quickly in the short term. The most important thing is that there are now a large number of applications entering!

Filecoin's 32G sector packaging time takes 2 hours. If this layer of barriers is not broken, the commercialization of filecoin is almost impossible, and Crust can also package 32G sectors as long as 60S, which has commercial applications. Base. Why can Crust improve efficiency in such a way while reducing costs? This is the TEE technology mentioned in the last program. It is like a catalyst in chemistry, which greatly enhances the packaging efficiency. Isn’t such an easy-to-use technology useless? The security team doesn't know?

Of course not, TEE is a very mature technology, and it has been commercially used for many years. TEE is used in traditional fields to ensure data security, but in the field of blockchain, new problems have emerged. Decentralized Insufficient, the security is actually not as strong as filecoin. So Filecoin did not choose TEE for job selection, and we don't know whether it is wise or regrettable.

What are TEEs?

At present, the system operating environment of the mobile terminal is called REE (Rich Execution Environment), and the system running in it is called Rich OS, including Android, IOS and Linux. Rich OS is characterized by powerful functions, but poor security. Rich OS can obtain all applications The data. We usually play APP, and many times the data may not be very sensitive. It is fine in the Rich OS environment, but it is very important that the information is not hijacked during payment and fingerprint recognition. It must be in a trusted environment. implement.

Then the chip manufacturer draws an area on the CPU. The function of this area is to provide a safer space for data and code execution. This is TEE. TEE can directly obtain REE information, but REE cannot obtain TEE. Information. TEE is a bit like the embassy of various countries. Although you are on the territory of other countries, all the data files in the embassy are safe, and other countries cannot just break in.

In addition, since TEE can also execute smart contracts confidentially, that is to say, not only token transactions can obtain privacy in the future, but the execution logic and process of transactions can also ensure privacy, and this privacy is verifiable for stakeholders. Now there is another pha that also uses TEE technology.

However, TEE technology is like a double-edged sword. In the end, TEE may succeed, and TEE may fail.

This is what I have been reminding you all the time. Although Crust mining is profitable, if you buy the whole mining machine, you can pay back the cost in more than a month, but project risks also exist. First of all, TEE technology is not decentralized enough, because it is an area set on the hardware, not as simple as a software upgrade, a program is enough, and then this technology is in the chip manufacturer, which is the lifeblood of TEE. In the hands of chip manufacturers, although chip manufacturers do not intend to do evil, they are somewhat incompatible with the concept of decentralization. Secondly, the solutions adopted by each chip manufacturer are also different. For example, Intel is the Intel SGX solution, ARM is the TrustZone solution, and AMD is the PSP solution. This can be said to be a good thing or a bad thing. After all, there are alternatives. , it is strengthened for decentralization.

Finally, there is a bigger problem with TEE.

For example, when talking about the Intel SGX solution, SGX needs to be verified when it is used, and the verification is initiated to the central server maintained by Intel. This is obviously an act that does not satisfy the concept of "decentralization" of the blockchain, and this method also has the risk of man-in-the-middle attacks and Intel doing evil.

TEE is like an iron box, but it is not foolproof. As long as the protection of TEE is breached by hackers, the private key and code inside will be completely controlled. It can be said that the value carried by the entire blockchain will be stolen and Destruction, and TEE is only a hardware solution, if there is a loophole, it is difficult to repair and upgrade through code.

Of course, another level I see is that more and more applications are being deployed in it. Therefore, for a project that intends not to deeply bind storage miners, it must have sufficient confidence that it can carry miners on the application. Dig and sell.

A practical financial writer who went from having nothing to a real "get" will accompany you on the road to wealth and freedom

Author: V Ke Baiyuan, principal of [Blockchain Thinking]

A practical financial writer who went from having nothing to a real "get" will accompany you on the road to wealth and freedom