| 摘要 |
Proposed are a digital key management system (1) and a method based on layered, two-tier double cryptographic keys (2) providing a closed cryptosystem for secure content distribution within a secured network environment (11). A first-tier cryptographic key (21) is generated and made public accessible within a first secured walled region (111), wherein the first secured walled region (111) is accessible to supply network nodes (3) registered to a first authentication database (121) associated with an access server (12) of the digital key management system (1). With the first-tier cryptographic key (21) the supply network nodes (3) access and decrypt first content (211). With a second-tier cryptographic key (22), the digital key management system (1) encrypts a second content (221) generating encrypted second content (222), wherein the second-tier cryptographic key (22) is accesses and decrypted by the supply network node (3) accessing the secured second walled region (112). |
