Avamprogetto 2a

Technical requirements for the handover interfaces for the execution of telecommunications surveillance

4.3.3.1.4 Message flow for rejection or error email order activation processing for real-time interceptions

The following figure shows the message flow in case of rejection or error.

CSP PTSS

Admin. Admin. Function Function

Adm. Adm.

Activation Order (e-mail)

Encryption: KCpub1 and KPpub1

Signed: KPpr11

Subject: Interception Type & reference

Content: XML (HI-1, Create Request, LITask)

Order form

Order reception confirmation

Encryption: KPpub1 and KCpub1

Signed: already signed

2 Subject: Re: Interception Type &

reference

Content: None

Confirmation of execution

Encryption: KPpub1

Signed: KCpr1

3 Subject: Error Re: Interception Type & reference

Content: XML (HI-1, Create Response, LITask)

Error

Order form

Acknowledgement of confirmationof execution

Encryption: KCpub1 and KPpub1

Signed: already signed4

Subject: Re: Error Re: Interception Type & reference

Content: none

Used OpenPGP keys: KPpub1 = public key from PTSS / KPpr1= private key from PTSS

KCpub1 = public key from CSP / KCpr1= private key from CSP

Figure 4-15: Message flow for rejection or error email order activation processing for real-time interceptions

In case of failure or rejection of the interception order by the CSP the message flows remains the same as described in section 4.3.3.1.1; however, in step  the CSP shall inform the PTSS of the error/failure or rejection of the order by adding: