The MULTOS specification is managed and directed by the MULTOS Consortium, whose members include payment organisations and leading technology companies. Keycorp, a founding member of this group, has encouraged and supported the development of the MULTOS step/one specification and our range of products have been issued globally. This provides the issuer with a complete range of products for EMV migration with seamless upgrade paths. MULTOS step/one for SDA (Static Data Authentication) or MULTOS for DDA (Dynamic Data Authentication).

Objectives of MULTOS step/one development

When the specification was being developed, there were a number of objectives that needed to be achieved:

• Provide an open platform approach to low-cost smartcard, maintaining all the benefits.
  
  
• Use a low-cost silicon platform (ie no need for RSA cryptographic capability, and much lower EEPROM).
  
  
• Compatibility with MULTOS at the card and perso system level.
  
  
• Multiple application
  
  
• Flexibility
  
  
• True interoperability between multi-sourced suppliers
  
  
• Off-the-shelf applications
  
  
• Re-use applications already developed for the MULTOS platform especially for EMV migration
  
  
• Easily develop new applications using C, Java or MULTOS assembly language
  
  
• Provide in-house key management for the card base

	MULTOS	MULTOS Step/one
Minimum memory size	8k	4k
RSA co-processor required
Platform management cryptography	Asymmetric (RSA)	Symmetric (Triple DES)
Platform Key management   Support for 3rd party Application Providers	MULTOS Key Management Authority	3rd party Card / Vendor Card Issuer