- TPBC Workshop - INF Mailman

Theory and Practice of Blockchains
by Christian Cachin 08 Jul '21

08 Jul '21

After 8 sessions, our seminar series has concluded. Thank you for your participating in, contributing to, submitting to, speaking at, helping with, or interacting at Theory and Practice of Blockchains 2021. On behalf of everyone, I thank you for your efforts. The website and this mailing list will remain active, waiting for future editions. Recordings of talks are available on the TPBC Youtube channel https://www.youtube.com/channel/UC_twxak5nXJrG-krI2c8YJA/videos It is the hope of everyone that conferences may take place again in-person next year. The TPBC Steering Committee (which a subset of this year's program committee) is interested in finding a venue and organizers for TPBC 2022. If you would like to volunteer, please get in touch with us immediately. Best regards, Christian Cachin

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TPBC 2021 - July 07, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 07 Jul '21

07 Jul '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run TODAY, July 7, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: SPARKs: Succinct Parallelizable Arguments of Knowledge Rafael Pass Cornell University * 15:45 UTC: Break * 16:00 UTC: Lockable Signatures for Blockchains: Scriptless Scripts for All Signatures Sri Aravinda Krishnan Thyagarajan, Giulio Malavolta Friedrich Alexander Universität Erlangen-Nürnberg, Max Planck Institute for Security and Privacy * 16:30 UTC: Differentially Private Mixing for Cryptocurrencies Foteini Baldimtsi, Samuel D. Gordon, Ioanna Karantaidou, Mingyu Liang, Mayank Varia George Mason University, Boston University * 17:00 UTC: Foundations of Ring Sampling Viktoria Ronge, Christoph Egger, Russell W.F. Lai, Dominique Schröder, Hoover H.F. Yin Friedrich-Alexander-Universität Erlangen-Nürnberg, The Chinese University of Hong Kong * 17:30 UTC: End of session Looking forward to seeing you later today! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 - July 07, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 05 Jul '21

05 Jul '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run on Wednesday , July 7, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: SPARKs: Succinct Parallelizable Arguments of Knowledge Rafael Pass Cornell University * 15:45 UTC: Break * 16:00 UTC: Lockable Signatures for Blockchains: Scriptless Scripts for All Signatures Sri Aravinda Krishnan Thyagarajan, Giulio Malavolta Friedrich Alexander Universität Erlangen-Nürnberg, Max Planck Institute for Security and Privacy * 16:30 UTC: Differentially Private Mixing for Cryptocurrencies Foteini Baldimtsi, Samuel D. Gordon, Ioanna Karantaidou, Mingyu Liang, Mayank Varia George Mason University, Boston University * 17:00 UTC: Foundations of Ring Sampling Viktoria Ronge, Christoph Egger, Russell W.F. Lai, Dominique Schröder, Hoover H.F. Yin Friedrich-Alexander-Universität Erlangen-Nürnberg, The Chinese University of Hong Kong * 17:30 UTC: End of session Looking forward to seeing you on Wednesday! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- June 30 (today!), 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 30 Jun '21

30 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run TODAY, June 30, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: On the Central Role of Networks in Blockchain Privacy, Security, and Performance Giulia Fanti Carnegie Mellon University * 15:45 UTC: Break * 16:00 UTC: GearBox: An Efficient UC Sharded Ledger Leveraging the Safety-Liveness Dichotomy Bernardo David, Bernardo Magri, Christian Matt, Jesper Buus Nielsen, Daniel Tschudi IT University of Copenhagen, Aarhus University, Concordium * 16:30 UTC: Ebb-and-Flow Protocols: A Resolution of the Availability-Finality Dilemma Joachim Neu, Ertem Nusret Tas, David Tse Stanford University * 17:00 UTC: On the Routing-Aware Peering against Network-Eclipse Attacks in Bitcoin Muoi Tran, Akshaye Shenoi, Min Suk Kang National University of Singapore, KAIST * 17:30 UTC: End of session Looking forward to seeing you later! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Wed June 30, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 28 Jun '21

28 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run on Wednesday, June 30, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: On the Central Role of Networks in Blockchain Privacy, Security, and Performance Giulia Fanti Carnegie Mellon University * 15:45 UTC: Break * 16:00 UTC: GearBox: An Efficient UC Sharded Ledger Leveraging the Safety-Liveness Dichotomy Bernardo David, Bernardo Magri, Christian Matt, Jesper Buus Nielsen, Daniel Tschudi IT University of Copenhagen, Aarhus University, Concordium * 16:30 UTC: Ebb-and-Flow Protocols: A Resolution of the Availability-Finality Dilemma Joachim Neu, Ertem Nusret Tas, David Tse Stanford University * 17:00 UTC: On the Routing-Aware Peering against Network-Eclipse Attacks in Bitcoin Muoi Tran, Akshaye Shenoi, Min Suk Kang National University of Singapore, KAIST * 17:30 UTC: End of session Looking forward to seeing you on Wednesday! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Wed June 23 (today!), 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 23 Jun '21

23 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run today, June 23, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: : Keynote: Scalability of Decentralized Trust: Some Lessons and some Recent Advances Ittai Abraham VMware * 15:45 UTC: Break * 16:00 UTC: On the Anonymity Guarantees of Anonymous Proof-of-StakeProtocols Markulf Kohlweiss, Varun Madathil, Kartik Nayak, Alessandra Scafuro University of Edinburgh, North Carolina State University, Duke University * 16:30 UTC: BFT Protocol Forensics Peiyao Sheng, Gerui Wang, Kartik Nayak, Sreeram Kannan, Pramod Viswanath UIUC, Duke University, University of Washington * 17:00 UTC: Achieving State Machine Replication without Honest Players Conor McMenamin, Vanesa Daza, Matteo Pontecorvi Universitat Pompeu Fabra, CYBERCAT - Center for Cybersecurity Research of Catalonia, NOKIA Bell Labs Nozay * 17:30 UTC: End of session Looking forward to seeing you later! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Wed June 23, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 21 Jun '21

21 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run on Wednesday, June 23, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: : Keynote: Scalability of Decentralized Trust: Some Lessons and some Recent Advances Ittai Abraham VMware * 15:45 UTC: Break * 16:00 UTC: On the Anonymity Guarantees of Anonymous Proof-of-StakeProtocols Markulf Kohlweiss, Varun Madathil, Kartik Nayak, Alessandra Scafuro University of Edinburgh, North Carolina State University, Duke University * 16:30 UTC: BFT Protocol Forensics Peiyao Sheng, Gerui Wang, Kartik Nayak, Sreeram Kannan, Pramod Viswanath UIUC, Duke University, University of Washington * 17:00 UTC: Achieving State Machine Replication without Honest Players Conor McMenamin, Vanesa Daza, Matteo Pontecorvi Universitat Pompeu Fabra, CYBERCAT - Center for Cybersecurity Research of Catalonia, NOKIA Bell Labs Nozay * 17:30 UTC: End of session Looking forward to seeing you on Wednesday! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Wed June 16, 15:00 - 17:30 UTC
by Marson, Giorgia Azzurra (INF) 16 Jun '21

16 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run today, June 16, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: Economic Incentives and Blockchain Consensus Sara Tucci CEA LIST * 15:45 UTC: Break * 16:00 UTC: The Discriminating Miner Dilemma: Revisiting Liveness Guarantees under Content Discrimination Fredrik Kamphuis, Bernardo Magri, Sebastian Faust Robert Bosch GmbH, Aarhus University, Technical University of Darmstadt * 16:30 UTC: A Rational Protocol Treatment of 51% Attacks Christian Badertscher, Yun Lu, Vassilis Zikas IOHK, University of Edinburgh, Purdue University * 17:00 UTC: Post-Quantum Security of the Bitcoin Backbone and Quantum Multi-Solution Bernoulli Search Alexandru Cojocaru, Juan Garay, Aggelos Kiayias, Fang Song, Petros Wallden Inria, Texas A&M University, University of Edinburgh, IOHK, Portland State University * 17:30 UTC: End of session Looking forward to seeing you later! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Wed June 16, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 14 Jun '21

14 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run on Wednesday, June 16, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: Economic Incentives and Blockchain Consensus Sara Tucci CEA LIST * 15:45 UTC: Break * 16:00 UTC: The Discriminating Miner Dilemma: Revisiting Liveness Guarantees under Content Discrimination Fredrik Kamphuis, Bernardo Magri, Sebastian Faust Robert Bosch GmbH, Aarhus University, Technical University of Darmstadt * 16:30 UTC: A Rational Protocol Treatment of 51% Attacks Christian Badertscher, Yun Lu, Vassilis Zikas IOHK, University of Edinburgh, Purdue University * 17:00 UTC: Post-Quantum Security of the Bitcoin Backbone and Quantum Multi-Solution Bernoulli Search Alexandru Cojocaru, Juan Garay, Aggelos Kiayias, Fang Song, Petros Wallden Inria, Texas A&M University, University of Edinburgh, IOHK, Portland State University * 17:30 UTC: End of session Looking forward to seeing you on Wednesday! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC 2021 -- Today June 09, 15:00-17:30 UTC
by Marson, Giorgia Azzurra (INF) 09 Jun '21

09 Jun '21

Dear TPBC 2021 participants, This is a kind reminder: The next session of TPBC 2021 will run TODAY, June 09, 15:00-17:30 UTC. Sessions will be held online using Zoom, and the link is only sent by email to the registered participants, see below. There is also a link that will import the ICS file to your calendars. Please make your real name visible and ensure you are muted when participating. We plan to record the sessions and make them available in the Youtube channel of TPBC. Here is the agenda for the session: * 15:00 UTC: Keynote: Should We Care About Central Bank Digital Currency? Roger Wattenhofer ETH Zurich * 15:45 UTC: Break * 16:00 UTC: MAD-HTLC: Because HTLC is Crazy-Cheap to Attack Itay Tsabary, Matan Yechieli, Alex Manuskin, Ittay Eyal Technion, IC3, Technion, IC3, ZenGo-X * 16:30 UTC: Reparo: Publicly Verifiable Layer to Repair Blockchains Sri Aravinda Krishnan Thyagarajan, Adithya Bhat, Bernardo Magri, Daniel Tschudi, Aniket Kate Friedrich Alexander Universität Erlangen-Nürnberg, Purdue University, Concordium Blockchain Research Center, Aarhus University, Denmark, Concordium, Zurich, Switzerland * 17:00 UTC: Free2Shard: Identity-free sharding via Dynamic Self-allocation Ranvir Rana, Sreeram Kannan, David Tse, Pramod Viswanath University of Illinois at Urbana-Champaign, University of Washington, Seattle, Stanford University * 17:30 UTC: End of session Looking forward to seeing you later! TPBC 2021 organization team --- crypto(a)inf.unibe.ch<mailto:crypto@inf.unibe.ch> is inviting you to a scheduled Zoom meeting. Topic: TPBC 2021 Time: May 26, 2021 05:00 PM Zurich Every week on Wed, 8 occurrence(s) May 19, 2021 05:00 PM May 26, 2021 05:00 PM Jun 2, 2021 05:00 PM Jun 9, 2021 05:00 PM Jun 16, 2021 05:00 PM Jun 23, 2021 05:00 PM Jun 30, 2021 05:00 PM Jul 7, 2021 05:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://us02web.zoom.us/meeting/tZYlcOyrrzssHdRs2Fbkf0TezTqVaygnGpD5/ics?ic… Join Zoom Meeting https://us02web.zoom.us/j/82875310670?pwd=SHZ1UHo2MUk5TWJvVWtMbnZQYUlPUT09 Meeting ID: 828 7531 0670 Passcode: 078079 One tap mobile +41432107108,,82875310670#,,,,*078079# Switzerland +41445299272,,82875310670#,,,,*078079# Switzerland

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TPBC Workshop