Avamprogetto 2a

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

CSP PTSS

Admin. Admin. Function Function

Adm. Adm.

Activation / Cancellation / Deactivation Order (e-

mail)

Encryption: KCpub1 and KPpub1

Signed: KPpr11

Subject: Interception Type & reference

Content: XML order, order form

Order reception confirmation

Encryption: KPpub1 and KCpub1

Signed: already signed

2 Subject: Re: Interception Type &

reference

Content: None

Administrative confirmation

Encryption: KPpub1

Signed: KCpr1

3 Subject: Re: Interception Type &

reference

Content: Retained data results: XML or file attachments

Acknowledgement of administrative confirmation

Encryption: KCpub1 and KPpub1

Signed: already signed4

Subject: Re: 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 4-17: Message flow for secure email order processing for retained data

 PTSS sends an email with the interception order. The order can be an activation order, a cancellation order or an information request. The XML order file is based on the RDMessage XSD specified in ETSI TS 102 657 V1.17.1. The body and the attachments of the email are signed and encrypted with the OpenPGP keys.

 CSP confirms the reception of the secure email order by sending back the received email body but without the attachments. The email's original subject is prefixed with the Re: