Radio access nodes and terminal devices in a communication network

A terminal device, the terminal device being configured to:

• operate in a connected state with respect to the communication network;
• and
• receive a first signal from a first radio access node in the communication network indicating that the connected state is to be suspended, the first signal comprising:
• information for use in determining a first key for encrypting data to be sent between the terminal device and one of the first radio access node and another radio access node in the communication network if the connected state is resumed;
• and
• information identifying a security algorithm configuration to be used for encrypting data.

A first radio access node for use in a communication network, the first radio access node being configured to:

• send a first signal to a terminal device that is in a connected state with respect to the communication network, the first signal indicating that the connected state is to be suspended, the first signal comprising:
• information for use by the terminal device in determining a first key for encrypting data to be sent between the terminal device and one of the first radio access node and another radio access node in the communication network if the connected state is resumed;
• and
• information identifying a security algorithm configuration to be used for encrypting data.