Patent ID: 7558633

Claim:
A test system for a user terminal apparatus, comprising: a test automation apparatus comprising a first processor and a non-volatile memory having a test workflow program stored therein, and a test interface connected to the control unit, said test workflow program causing said data processing unit to generate simulated test signals, respectively test commands, that are emitted at said test interface; in said user terminal apparatus, a second processor and a non-volatile memory protected by a security housing, and an internal interface, connected to said second processor, at said security housing in communication with said test interface of said test automation apparatus to receive said simulated test signals; an external interface at said user terminal apparatus connected to said second processor; and said second processor being configured to generate a digital signature input component and to transmit said digital signature input component from said user terminal apparatus to said test automation apparatus, and said first processor being configured to generate a digital signature using said digital signature input component and to cause said test signals to be transmitted from said test automation apparatus to said user terminal apparatus signed with said digital signature; and said second processor being configured to check and verify said digital signature and, if said digital signature is verified, to transmit a verification result from said user terminal apparatus to said test automation apparatus; said first processor being configured, only upon receipt of said verification result, to generate an acknowledgement signal and to transmit said acknowledgment signal to said user terminal apparatus; and said second processor being configured to receive said acknowledgement signal and to interpret said test commands represented by said test signals only if and when said acknowledgement signal is received.