Hydrus Decode

[KeenanGeorge03]

Hi

When we decode the hex telegram of a hydrus meter we get the following:

/wmbusmeters # ./wmbusmeters --format=json 1E4424238B07000580547A430010584CFA43C5B13B7F55D8996D4759B1442E
No meters configured. Printing id:s of all telegrams heard!
Received telegram from: 54800500
manufacturer: (HYD) Hydrometer (0x2324)
type: Water meter (0x07) encrypted
ver: 0x8b
driver: hydrus

Note it shows the data is encrypted however when we supply NOKEY it still decrypt the data.

{"media":"water","meter":"hydrus","name":"meter","id":"55851955","total_m3":19524.013,"total_tariff1_m3":0.465,"total_tariff2_m3":0,"max_flow_m3h":1.832,"flow_temperature_c":17,"external_temperature_c":0,"current_date":"","total_at_date_m3":19378.373,"total_tariff1_at_date_m3":0,"total_tariff2_at_date_m3":0,"at_date":"2022-08-31 23:59","actuality_duration_s":0,"operating_time_h":0,"remaining_battery_life_y":9.990418,"status":"TEMPORARY_ERROR LEAKAGE_OR_NO_USAGE","timestamp":"2022-09-08T16:47:33Z"}

If we supply a random key it still decrypt aswell.

[KeenanGeorge03]

Hi any feedback on the above