An Improved Authentication Scheme for Digital Rights Management System

Table 4

Security features.

Schemes attributes	Our	[13]	[10]
PMA	✓	✗	✓	✗
PUA	✓	✓	✗	✓
PUS	✓	✗	✓	✓
RRA	✓	✓	✓	✓
RSD	✓	✓	✓	✗
RIA	✓	✗	✓	✗
RMA	✓	✓	✓	✓
PPF	✓	✓	✓	✓
ROP	✓	✓	✓	✓
RPI	✓	✗	✓	✓

Note: PMA: provides mutual authentication; PUA: provides user anonymity/untrability; PSU: provides user scalability; RRA: resists replay attack; RSD: resists stolen mobile device; RIA: resists impersonation attack; RMA: resists man in middle attack; PPF: provides perfect forward secrecy; ROP: resists offline password guessing; RPI: resists privileged insider attack; ✓: provides; ✗: not provides.