This patch provides the feature implementation for CMC encryptedPOP and decrypedPOP used for Proof of Possession for encryption keys in the following ticket: #2615 CMC: provide Proof of Possession for encryption cert requests Note tha it is an incremental patch based off #2613 CMC: id-cmc-identityProofV2 feature implementation Which I submitted yesterday There will be a small "cleanup" patch after this. thanks, Christina