ACOSJ is a smart card operating system developed by Advanced Card Systems Ltd. Compliant with GlobalPlatform Card and ISO 14443 Parts 1, 2, 3, 4 specifications and powered by Java Card Technology, it provides a secure platform for rapid application development of many value-adding applets, including e-banking, e-payment, loyalty, e-government, and public key infrastructure (PKI). ACOSJ has a fast read/write speed, is highly durable, and can house multiple secure applications. It comes in module and card options.

Contactless interface spec:

• Full 40KB of EEPROM memory for application data
• Compliance with ISO 14443 Part 1, 2, 3, 4 
  • Supports T = CL direct protocol
  • Supports high-speed transmission rate from 9.6 to 223.2 kbps with modifiable ATR
• Supports DES/3DES/3K3DES/AES-128/AES-192/AES-256
• Supports RSA (up to 2048 bits) and ECC (up to 384 bits)
• Supports SHA1/SHA224/SHA256/SHA384/SHA512
• Supports SM2/SM3/SM4
• Supports SEED (128 bits)
• Common Criteria EAL5+ (Chip Level) Certified
• EMVCo (Chip Level) Certified
• Compliance with Java Card Specification Version 3.0.4
• Compliance with Global Platform Specification Version 2.2.1
• Compliance with Mapping Guidelines 1.0.1
• Supports Secure Messaging
• Supports Mutual Authentication
• Supports Anti-tearing function