Why do you want to encrypt and decrypt the PLC - Database & Sql Blog Articles

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All plc ciphers have two high-sounding reasons.

One is to protect intellectual property rights, and the other is to ask for construction money.

The person who protects the intellectual property said that the program that he worked so hard has suddenly made people feel like it, and he is unwilling, but in turn, think about it. Is the program you compiled really so brilliant? Is it really impeccable? Your after-sales service Do you do it in place, can you make changes to your customers at any time? If not, how to deal with the customer's problems, who to find repair, can only stop, eight lift the big car, please ask this programming master to handle it. Besides, there are many people who can program the program. I have a friend who is doing mechanical equipment. I have to do equipment that people have developed. He is doing the same, and adding his own better things cannot be exactly the same. Let me program him, I said forget it, I decrypted and used other people's programs to read them directly. He said no, there is no core technology. If you don't know how to check, you can analyze other people's programs. Heavenly book. I can't help but still decipher and see, hey, how bad the program is. Less protection, lack of interlocking, I really can't use it, just use your own to use the rest assured.

Ask the project to say that buying components, making cabinets, working hard to install wiring, debugging, only take a 30% deposit, the rest is still paid in installments, it is not easy, sometimes equipment manufacturers encounter this, also require If you do this, add a count or a timed stop in the program. When the time is up, or the work output is up, you can pay the money in one hand and open the password in one hand. This is clearly stated, and there is also an unclear statement. The money went to pretend that it was two times, and it was repaired. I heard that there was a device stoppage, the production line was well produced, and all the stops were stopped at 12 o'clock in the evening. All of them had no output. I asked for programming and paid for it. Innocent look. What's more, all the engineering funds have been given, and the equipment will fail once or twice a year. The equipment manufacturers are coming, and the two are good. The travel expenses have not been said, how to estimate the loss of equipment downtime.

The above said, the kind of all counterfeit equipment is hateful, but you can't solve the problem with encryption. It's like copying you, encryption is useless. Just follow the example, you can only speed up the upgrade by strengthening your technical level. Increase the added value, better after-sales service, price advantage and other methods to occupy the market.

It is not feasible to use the method of project payment. You have the legal channel to investigate the buyer's credit method in advance. There are contract constraints. Use encryption to deliberately set obstacles. If the fault causes big losses, is it negative? The risk of legal liability.

The rest is the kind of programming cryptographer that is intentionally destroyed for personal gain. This kind of PLC does not crack it, but when.

I am thinking about the electric control system of the car without PLC control, plus no encryption. The escalator electronic control system is not controlled by PLC, and is not encrypted. Decrypt the PLC to check if there are any blocks that are intentionally stopped.