What is the working group formed by the IETF to develop standards and models for the PKI environment?
a. Public-Key infrastructure X.509 (PKIX)
b. Public-Key Cryptography Standards (PKCS)
c. Public-Key and Private Key (PPK)
d. Public -Key Infrastructure and Systems (PKIS)
Answer: a. Public-Key infrastructure X.509 (PKIX)