Telecommunications device security

A system for processing encrypted data received by a terminal, the system comprising:

• a normal execution environment in the terminal, and
• a secure execution environment in the terminal, wherein the secure execution environment is configured to:
• evaluate the encrypted data to identify secure application components that are not loaded in the secure execution environment, wherein the secure application components are not loaded are new secure application components;
• obtain the new secure application components by downloading the new secure application components from an application server and loading the new secure application components in the secure execution environment;
• obtain key information for decrypting the encrypted data using at least the new secure application components loaded in the secure execution environment;
• wherein the encrypted data is decrypted in the normal execution environment.

A method for processing encrypted data received by a terminal, the method comprising:

• providing a securing platform on the terminal, the security platform including a normal execution environment and a secure execution environment, where a secure application component is loaded in the secure execution environment and executes only in the secure execution environment, wherein the secure application component corresponds to a secure protocol;
• obtaining key information necessary for decrypting the encrypted data;
• processing the key information with the secure application component to obtain decryption information, wherein the secure application is amended or replaced when amendment or replacement is needed to process the key information, wherein a new secure application component is automatically downloaded when the new secure application component is needed to process the key information;
• and
• decrypting the encrypted data in the normal execution environment using the decryption information.