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www.oasis-open.org. OASIS Digital Signature Services . Juan Carlos Cruellas Andreas Kuehne Stefan Drees Ernst Jan van Nigtevecht Frank Cornelis Oscar Burgos. Agenda. Digital Signature Services (DSS): Mission statements of DSS* Technical Committees. Offerings / Use Cases: - PowerPoint PPT Presentation

Text of OASIS Digital Signature Services

OASIS Digital Signature Services

OASIS Digital Signature Services

www.oasis-open.org

Juan Carlos CruellasAndreas KuehneStefan DreesErnst Jan van NigtevechtFrank CornelisOscar Burgos11AgendaDigital Signature Services (DSS):Mission statements of DSS* Technical Committees.Offerings / Use Cases:DSS The Interface to the Signing service.Signature Validation Push it to the Cloud !As Time goes by Your Signatures ?Capable Client Devices Local Signing ?Conformance & Interoperability Upcoming Event

2OASIS Digital Signature Services (DSS) TC1:Mission: Defining an XML interface to process digital signatures for Web services and other applicationsDeliverables (A set of OASIS standards, in 2007): Core protocols, elements, bindings and profiles.OASIS Digital Signature Services eXtended (DSS-X) TC2 (successor of DSS TC extending and maintaining DSS).Mission: Advancing digital signature services standards for XML

Notes: 1) Completed in 2007 to accommodate for OASIS IPR policy changes 2) Created in 2007 operating under OASIS RF IPR mode33OASIS DSS Standards: The interface to the Signing Services.Protocols for central Signature Generation services:No more problems with infrastructure deploymentsSupport for individual generation delegatedReduces overhead of key management: Central server in charge of required tasks Like e.g. certificate status in Generation.All details of Signature Policies centralized.Enables centralized auditing.44Verification Push it to the cloud !DSS OASIS Standards:Protocols for central Signature Verification services:Verification (with all its complexity) ?Implemented at and Deployed to the server once.Reduce overhead of key management: Central server in charge of required tasks !Like e.g. certificate status in Validation.All details of Signature Policies centralized, enables:Exhaustive (standardised) validation reportsLog of all validation processes and resultsCaching (of CRL, OCSP, TSL, ...) !55As Time goes by Your signatures ?DSS capable central Servers take care ! DSS OASIS Standards:Protocols for central Signature Upgrade services:A) You may send a signature and request that: it is time-stamped with a signature time-stamp Or if it already has one cf. BB) You may request to: include in the signature all the validation material (OCSP responses, certificates in the certification path, etc.) and then time-stamp this bundle for achieving a long-term signature.66Personal key pairs must be controlled personally ?Yes, of course ! But all the boring and burdensome rest of the signing party ? No, Thanks ! Delegate impersonal tasks involved to server !DSS-X TC is working on such a standard:Local Computation of Signature Values77Finally, what if you want to check if your server: Interoperates well with other Implementations ?Complies to DSS Standards ? Yes, Please ! DSS-X TC is Scoping, Preparing and Organizing:Remote Event where participants will be able to:Test their servers Conformity: With a subset of the DSS protocolsTest the Interoperability of their ServersWith all other participating Servers88Useful information:DSS-X TC Public page: https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=dss-xRaise comments sending an email to: [email protected] the documents archives at: https://www.oasis-open.org/committees/documents.php?wg_abbrev=dss-x9Q&A10DSS concept. Conventional approachDeploy key to each userHandle Interface to all PKI functionsSecurity depends on user

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PKI CertificateManagementDirectorySystem

Internal userAuthentication &authorisation

DSS concept. DSS approach

DSS Server12

DSS also forms the basis for the emerging standard eID-framework DSS (X)

ISO/IEC 24727 / CEN TS 15480 (European Citizen Card)

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http://www.eid-stork.eu/ classical DSS-domainnew13Ebxml Messaging Transport Binding for DSS. Specifies how DSS messages are encoded and carried using OASIS ebXML Message Service (Ebxml MS: transport mechanism for e-business ).Binding for robust channel between DSS clients and servers and ebxm features (i.e. asynchronous messaging).Profile for managing visible signatures.Need to display (mostly in signed documents) information on the digital signatures to human beings, parts of which may also be signed.Clients will instruct servers to incorporate this visual information in the created signatures. Servers will also verify this signed visual information.Profile for supporting centralized encryption/decryption.Aims at providing protocols for requesting centralized encryption/decryption operations (CMS and XML Encryption).Combination of encryption and signature.1414Features: encryption/decryption of parts of a document, encryption for different recipients, etc..Profile for detailed individual verification reports.Individually report on each signature found in a document and incorporation in each one relevant details of the verification process, satisfying the business requirement of logging them. Profile for signed verification responses.Aims at allowing to DSS clients to request that the verification response is actually signed by the verifying server.Responses that may be seen as signed receipts of the verification of a certain signed documentProfile for handling signature policies.Request generation/verification of a digital signature following a certain set of rules (signature policy).Different documents may require different types of signatures, generated and verified following different rules and processes. Analysis of inter-relationships among existing profiles.1515Paving the way (II): Interoperability events: Standards more and more complex. Interoperability is an issue. Interoperability tests:Very useful for progressing towards interoperability.Provide feedback to the Standardization Bodies from actual implementers, helping in getting better standards (identify wrong or ambiguous parts, identify new requirements, etc.).Face to face: XML Sec maintenance WG in 2007.BUT now ALSO REMOTE interoperability events. ETSI owns a portal supporting remote interoperability tests on XAdES signatures. It has conducted two Remote Interoperability events on XAdES (high figures of participation from Europe and Asia) and organized a third one for next year on XAdES and CAdES. See details at http://xades-portal.etsi.org/pub/XAdES.shtmlAlso former DSS TC organized a restricted interoperability test between the TC members.1616DSS-X overviewebXML Messaging Transport Binding for DSS. Guidance: cross-matrix for existing profiles joint usage1717Current status of specificationsCommittee Specifications: Profile for requesting generation and/or verification of visible signatures. Profile for generation of a multi-signature verification report providing detailed information on the signature verification process.ebXML Messaging Transport Binding for DSS.

1818Additional activitiesThe DSS-X is defining an interoperability event on DSS and DSS-X specifications: Contacts between OASIS and ETSI for jointly organize a formal remote interoperability event. DSS-X TC members are completing a the first version of the test suite.ETSI would provide a portal supporting the conduction of remote interoperability events.Initial plans: to be ready for making such event during the first half of 2011.

1919Additional activitiesThe DSS-X has started the production of a cross-matrix for clarifying joint usage of the differen DSS and DSS-X profiles.

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