How to choose a truly effective encryption chip

1, the choice of chip platform we all know that the current embedded encryption industry, there are two camps, one is the traditional logic encryption chip, using the IIC interface, the principle is the EEPROM peripheral, plus hardware protection circuit, built-in some Algorithm; The other is the use of smart card chip platform, take full advantage of the high security of the smart card chip itself, the old attack various external means of attack. Logical encryption chip, its own protection ability is very weak, most of the decryption company can easily crack, has been gradually phased out. Instead, it is the best proven smart card platform. In order to improve the high security of the smart card chip, the smart card chip that needs to be selected has an EAL4+ chip of the International Security Accreditation Committee, otherwise the security is difficult to meet the requirements. Ling Kexin's LKT series encryption chips fully meet this requirement, while other companies use the smart chip chip platform's encryption chip, but it can not be achieved.

2. Security of the chip operating system Under the premise that we determine the smart card chip platform, we need to consider the security of the chip operating system. The LKCOS operating system of Lingkexinan has undergone rigorous testing by authoritative departments and has extremely high Security, no security holes. Without a PBOC-certified crypto chip system, high security cannot be achieved. In addition, the LKCOS of Lingke Core Security can effectively manage the internal resources of the chip and protect the underlying interface at the same time. It does a lot of practical and effective protection to ensure that pirates cannot attack or crack from the chip operating system. This point is very important. Other cryptographic chip suppliers that use smart card chip platforms only provide an interface for algorithm download. Little protection is provided for chip resource management and the underlying protection of the interface. Then, pirates can exploit it as loopholes. Attacked. Ling Kexin security research and development team, after careful comparison of similar products, reached the above conclusions.

3, the choice of encryption program Traditional encryption chips, are using algorithms to verify the program, what they are advocating is how complex the encryption algorithm, how difficult to crack, but did not consider the algorithm authentication program itself has a huge security hole. We clearly know that the SCM is an insecure carrier. It can be said that it is completely transparent to the pirates and it is not an exaggeration to do algorithm authentication. It is necessary to write the key or password in advance inside the SCM. After the microcontroller to a judgment mark, as a judgment of the implementation of the microcontroller, then the pirates can easily seize this point to attack, simulate given a single-chip signal, easily bypass the encryption chip, so as to achieve the purpose of cracking. If you want to break the internal data of the chip, you can use traditional methods such as slice, UV, debug port, and energy analysis to crack it.

The use of a cryptographic chip of a smart card chip platform can effectively protect these attack methods by itself. Some of the codes or algorithms in the MCU are embedded inside the cryptographic chip, and these programs are executed inside the cryptographic chip so that the program code inside the crypto chip becomes an entire program code. Part of the MCU program, which can achieve the purpose of encryption, because the MCU internal program is not complete, even if it is pirated, because of the lack of key code, can not be copied, then choose what kind of code or program, into the encryption chip It is to test the skill of the MCU programmers, implant as many procedures as possible, and increase the strength of the algorithm as much as possible to effectively prevent the possibility of being deciphered. Therefore, the LKT4200 32-bit smart card chip platform can solve all problems, and even floating-point operations inside the chip are no problem.

Therefore, we suggest choosing the encryption chip, the smart card chip platform, and the 32-bit smart card chip platform.