Cement Accelerator,admixture accelerator,set accelerators,non chloride accelerator,set accelerating admixtures Shanghai Hongyun New Construction Materials Co., Ltd , https://www.hongyunpce.com
Comparison of MIFARE1 Card and CPU Card Features
**MIFARE1 Card vs. CPU Card: A Comparative Overview**
When comparing MIFARE1 cards with CPU cards, it's clear that the latter addresses many of the limitations of the former. But what exactly sets them apart, and what advantages does a CPU card offer? Here's a detailed breakdown:
(1) **Storage Space and Partitioning**:
MIFARE1 cards have very limited storage capacity and use a fixed sector and block structure, which restricts flexibility. In contrast, CPU cards offer significantly more memory space—often several times larger—making them more suitable for modern applications. Their file-based storage system is similar to an operating system, allowing for much greater customization and adaptability.
(b) **Key Length and Security Control**:
MIFARE1 cards typically use a 6-byte password per sector, offering relatively weak security. CPU cards, on the other hand, support 16-byte keys and can implement multi-level partitioning. This enables advanced security configurations, such as multiple key combinations across different partitions, greatly enhancing overall data protection.
(c) **Encryption and Authentication Algorithms**:
MIFARE1 relies on proprietary, closed-source algorithms that have been successfully cracked over time. CPU cards, however, use widely recognized and open encryption methods, often supported by hardware acceleration. These algorithms can be customized and meet international financial standards, making them more secure and reliable.
(iv) **Read-Write Security Module**:
MIFARE1 cards authenticate using built-in keys and communicate with a private base station chip, a method that has proven vulnerable. CPU cards utilize a universal read-write module that transmits data transparently. They employ SAM (Security Access Module) key algorithms, performing authentication internally between two cards and using encrypted random numbers during transmission, which significantly improves the security of the read/write process.
(e) **Transaction Process**:
The transaction process in MIFARE1 cards is simple and non-standard, requiring custom security measures. CPU cards follow standardized financial protocols, allowing for both compliance and user-defined flexibility, making them more versatile for various applications.
(6) **Access Control**:
MIFARE1 cards support basic access control options like read-only, write-only, or read-write, along with increment/decrement functions. CPU cards, however, allow for more sophisticated access control, enabling different authentication mechanisms for different file types, providing better control over who can access what.
(vii) **Advantages of the CPU Card**:
From a security standpoint, CPU cards are far superior. They support multiple security layers, including software protection, and can handle various applications simultaneously. For example, they can emulate a virtual MIFARE1 card, allowing one card to serve multiple purposes. The combination of the card’s operating system (COS) and custom software enhances operational flexibility, making CPU cards a more robust and future-proof solution.