Which technology is primarily used by smart cards for storing cryptographic information?

Smart cards primarily use Public Key Infrastructure (PKI) for storing cryptographic information. PKI is a framework that manages digital keys and certificates, enabling secure communication using encryption techniques. In smart cards, PKI allows for the generation, storage, and management of cryptographic keys, providing a secure method for authentication and data encryption. This is particularly important in various applications such as secure transactions, access control, and identity verification.

The other technologies listed, while important in their respective areas, do not serve the primary function of storing cryptographic information on smart cards. AES is an encryption standard used for securing data, but it is not specifically designed for key storage like PKI. Blockchain provides decentralized and tamper-proof data management, but it is not directly used within smart cards for cryptography. SSL is a protocol for establishing secure connections over networks and does not relate to the storage capabilities of smart cards.