Security module
The security module provides security services for WAP related applications, and allows the use of the
phones digital signature functionality. If present, the security module is in the SIM card as an optional
service of your service provider. The security module helps to determine whether the card content has
not been maliciously read or modified. It can contain certificates, as well as private and public keys to
operate the certificates. The certificates are stored in the security module by SIM card issuer or service
provider.