This counter tracks the octet volume input to this module that required encryption, since the last reboot. Combined with ccaAcclEncryptPkts, this gives the admin the actual data volume being encrypted by this specific module, the figure that matters most for judging whether the module is approaching its rated throughput. If this counter on one module is climbing toward the throughput ceiling implied by ccaMaxCryptoThroughput, that's the specific module the admin should plan to offload before it becomes a bottleneck.