Research Article
An Improved Authentication Scheme for Digital Rights Management System
| | Symbols | Explanations |
| | , | Mobile user, license server | | , | Identities of , | | , | Password and biometric of | | , | Secret keys , | | , | Hash and biohash functions | | , | Random nonces | | Unique random nonce for each user | | , | Current timestamps | | Secret key of digital content | | Master key of license server | | Allowed transmission delay | | ||, | Concatenation and XOR operations |
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