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A custom Java Card project treats the smart card as a controlled application platform, rather than simply loading multiple applets onto the same chip, thereby supporting the execution of multiple applications. Each applet should have its own independent security context, data, credentials, and access rules; shared services should be explicitly designed rather than assumed by […]
When choosing between the three 13.56 MHz RFID chip—MIFARE, DESFire, and ICODE—you should first consider the specific application of the card, rather than focusing solely on the fact that they all operate at 13.56 MHz. In procurement, the term “MIFARE” typically refers to MIFARE Classic, while DESFire itself is a higher-security branch of NXP’s MIFARE […]
Yes, they can support both cryptocurrency wallet signing and FIDO2 authentication. As long as they have sufficient storage space, the necessary cryptographic algorithms, an appropriate FIDO2 transmission mechanism, and a lifecycle architecture that keeps the two applications independent, a Java Card crypto card can fully support both cryptocurrency wallet signatures and FIDO2 authentication on the […]
When selecting a Java Card chip to support multiple mini-programs for government-issued ID cards, start with the complete application architecture rather than focusing solely on storage capacity or chip brand. First, identify all the mini-programs the card must support, estimate the required persistent storage and working memory (RAM), determine the necessary encryption algorithms, plan how […]
To avoid duplicate credential IDs on a 125kHz proximity card, simply printing different numbers on the card surface is not enough. First, define the credential format used by the access control system and assign non-overlapping ID ranges. Then encode each card using a controlled production database. Before writing data, we must verify the uniqueness of […]
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, […]
In large-scale citizen ID card projects involving hundreds of thousands of cards, the cards’ functionality goes far beyond verifying a single citizen’s identity. Each card must have consistent security features, interact with a wide range of card readers, protect keys and identity data throughout a service life spanning several years, support controlled personalization, and remain […]
When selecting a contact card chip, consider two key questions: How much data does the card need to store? What level of protection do these data or credentials require? These two requirements point to different types of chips. Simply defaulting to the chip with the largest storage capacity or the highest security level is often […]
A government ID card is more than just a document with a printed design and a built-in security chip. Its core functionality comes from the applications running within the Secure Element, including storing identity credentials, verifying the cardholder’s identity, protecting encryption keys, responding to government terminals, and supporting various public service applications. Indeed, Java Card […]
Institutional-grade crypto asset custody involves more than protecting private keys. The more critical questions are: Where are the signing permissions stored? Who activates those permissions? And can compromising a single employee, server, or device transfer assets? MPC technology solves this problem by distributing signing permissions across multiple key shards. The system no longer stores the […]