Exchange of digitally signed SPSCertificate messages Overview of prototype of digital signature applied to SPSCertificate message between national systems.

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Presentation transcript:

Exchange of digitally signed SPSCertificate messages Overview of prototype of digital signature applied to SPSCertificate message between national systems and TRACES UN/CEFACT Forum Geneve, April

What do we currently have? SPSCertificate based message exchange with TRACES is available New Zealand is getting ready to exchange on large scale: Fishery products Meat of bovine and ovine animals Target is to make exchanges with non- repudiation to enable the paperless exchange Digital signature will enable this

Digital Signature overview Hash Function Message Signature Private Key of sender Encryption Digest Message Decryption Public Key of sender Hash Function DigestAlgorithm DigestAlgorithm Expected Digest Actual Digest Compare

How will we apply digital signature? On the incoming messages (SPSCertificate) Signed by sending authority On the reply (SPSAcknowledge) Signed by TRACES Based on our recommendations made in analysis presented in Geneva in April 2013: Enveloping signature XML-based (XAdES) Timestamp froml trusted time stamp authority (TSA) for archival purposes

Example of signed SPSCertificate message Enveloping Signature SPSCertificate enveloped in the Signature

Architecture Overview ClientTRACES ESSI XMLGate Signed SPSCertificate message Signed SPSCertificate message forwarded Signature validated Certificate data validated, stored SPSAcknowledgement created, signed SPSAcknowledgement returned

First use-case: New Zealand exports to EU Meat products, fishery products – documents per year Digitally signed health certificates for export to the EU from NZ eCert system Digitally signed acknowledge messages from TRACES Machine-to-machine signature (eCert / TRACES)

Certificates to use TRACES will use certificate provided by ESSI (Commission as Legal Entity) New Zealand certificate provider (probably) not on EU trusted list No global solution in sight for this problem: Bilateral agreement on technologies and profiles Both sides must test each other's signed messages for interoperability We may need to define a "SANCO TLS" to add the CSP used in New Zealand to ESSI infrastructure

The steps ahead Agree on CSP on both sides Agree on technical details for interoperability (XAdES level, profile…) If necessary, define a "SANCO TLS" Off-line verification of signed messages from both sides Integrate to trust services on both sides Start the exchange Electronic "vault" needed – legal requirements?