metrics.put("totalRotations", totalKeyRotations.get());
        metrics.put("lastRotationTime", lastKeyRotationTime.get());
        metrics.put("bytesEncryptedSinceLastRotation", bytesEncrypted.get());
        metrics.put("timeSinceLastRotation", System.currentTimeMillis() - encryptionStartTime);
        metrics.put("rotationBytesLimit", keyRotationBytesLimit);