What is the second phase of public key infrastructure (PKI) key/certificate life-cycle management?

The Implementation Phase is not a standard named phase in the canonical PKI certificate lifecycle model; the recognized phases are Initialization, Issued, Cancelled (Revocation), and similar stages.

The Cancellation (or Revocation) Phase is a later phase in the PKI lifecycle, occurring when a certificate is revoked or expires, not the second phase.

The Initialization Phase is actually the first phase of the PKI lifecycle, where key pairs are generated and certificate signing requests (CSRs) are created, not the second phase.

In the PKI certificate lifecycle, the Initialization Phase is the first phase where keys are generated and certificate requests are created. The Issued Phase is the second phase, where the Certificate Authority (CA) validates the request and issues the signed digital certificate, making it active and usable for cryptographic operations.