About the encryption algorithm in free5gc

Q/A
,
#1

Is the elliptic curve encryption algorithm applied to SUPI in FREE5GC? Why not use other asymmetric encryption algorithms?

#2

Yes, we applied the elliptic curve algorithm to SUPI in free5gc UDM.

Below is an example of the encryption function we use.

import (
"crypto/elliptic"
)
c := elliptic.P256().Params()

The reason why we use the elliptic curve algorithm instead of other asymmetric encryption is that ECC can reach the same level of security when using shorter key.

#3