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A Java Card Applet may run normally on one chip but fail on another. This usually doesn’t mean Java Card technology lacks portability. More often, the application depends on a specific combination of Java Card version, CAP file format, imported APIs, cryptographic algorithms, memory resources, GlobalPlatform configuration, or chip-specific features. As a result, migration may […]
Choosing an algorithm is first and foremost a compatibility decision, followed by performance considerations. When choosing between ECDSA and Ed25519 for a Java Card crypto card, the first question is: Which signature algorithm does the target blockchain or wallet protocol require? Both ECDSA and Ed25519 are elliptic curve digital signature algorithms, and when properly implemented, […]
The NXP P71 JCOP 4.5 J3R452 Java Card is based on the SmartMX3 P71D600 secure microcontroller platform and runs the JCOP 4.5 operating system. It supports the Java Card 3.0.5 Classic and GlobalPlatform 2.3.1 standards, features contact and contactless interfaces, advanced cryptographic technologies, and PUF-based hardware security features, and provides about 450 KB of application […]
The chip, Java Card runtime environment, security architecture, cryptographic engine, communication interfaces, and intended use cases collectively determine whether a Java Card meets specific deployment requirements. The NXP JCOP2 40K J2A040 Java Card belongs to an earlier but technically very mature generation of JCOP platform products. It is designed based on a contact-based architecture, provides […]