GB/T 17902.2-2005

This standard specifies identity-based digital signature mechanisms with appendix, defining algorithms and protocols that use user identifiers (such as email addresses or phone numbers) as public keys, eliminating the need for certificate management. It is applied in Chinese information technology security contexts, particularly for electronic authentication in government services, financial transactions, and enterprise systems where simplified key management and direct identity binding are required. The standard ensures interoperability and security compliance for digital signatures in environments like e-government platforms or secure messaging systems.