GB/T 38540-2020 Information security technology—Technical specification secure electronic seal signature cryptography

GB/T 20518-2006 Information security techniques—Public key infrastructure—Digital certificate format GB/T 20518-2018 Information security technology—Public key infrastructure—Digital certificate format GB/T 20520-2006 Information security technology—Public key infrastructure—Time stamp specification GB/T 32905-2016 Information security techniques—SM3 cryptographic hash algorithm GB/T 32918.1-2016 Information security technology—Public key cryptographic algorithm SM2 based on elliptic curves—Part 1:General GB/T 32918.2-2016 Information security technology—Public key cryptographic algorithm SM2 based on elliptic curves—Part 2:Digital signature algorithm GB/T 32918.3-2016 Information security technology—Public key cryptographic algorithm SM2 based on elliptic curves—Part 3:Key exchange protocol GB/T 32918.4-2016 Information security technology—Public key cryptographic algorithm SM2 based on elliptic curves—Part 4:Public key encryption algorithm GB/T 32918.5-2017 Information security technology—Public key cryptographic algorithm SM2 based on elliptic curves—Part 5:Parameter definition GB/T 33560-2017 Information security technology—Cryptographic application identifier criterion specification GB/T 35276-2017 Information security technology—SM2 cryptography algorithm usage specification GB/T 20520-2025 Cybersecurity technology—Public key infrastructure—Specification for time stamp