# Calculation of metrics ## Cyberweather The calculation of cyber weather (cybertoxicity in cyT) is performed as follows: $$ cyT = 1 \* in + 10 \* out \text{, with }\begin{cases} \text{ } in \text{ the number of toxic flows IN} \ \text{ } out\text{ the number of toxic flows OUT}\end{cases} $$ The weighting of an **OUT** toxic flow is much more important because it represents a network device that initiates a communication to a toxic IP address. There are 5 different levels of cyberweather:

Cybertoxicity (cyT)	Icon
Equal to zero
Between 1 and 5 inclusive
Between 6 and 10 inclusive
Between 11 and 99 inclusive
100 and more

## Cybercarbon The cyber carbon represents the **equivalent in CO2 emissions** (CO2e) of the **volume of the network flows**. According to the ADEME (French Environment and Energy Management Agency) and a report posed in January 2022, the study shows that the environmental impact of data transmission on : * a **fixed** network (about **18 gCO2e / Go**) * a **mobile** network (estimated at 50 gCO2e / Go) {% embed url="" %} Source of the environmental impact of fixed and mobile networks {% endembed %} In the case of Serenicity, the majority of the devices are installed on **fixed networks**.\ Therefore, the calculation is as follows: $$ cyC \text{ (in gCO2e) }= \frac{18 \* x}{10^9} \text{, with } x \text{ the sum of the flows in bytes} $$ {% hint style="info" %} The notation **gCO2e / kgCO2e** means **gram / kilogram CO2 equivalent**. {% endhint %}