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Syrian Democratic Council holds talks with political parties ahead of general conference

#Syria #SDC #SyrianDemocraticCouncil #LaylaQaraman #PYD #PDPKS #PDKS #SyriaTransition…
Syrian Democratic Council holds talks with political parties ahead of general conference
DARAMSUQ — The Syrian Democratic Council (SDC) has begun a series of meetings with Syrian political parties and forces as it prepares to hold its general conference, with discussions focusing on the next phase of political work and the council’s future role. An SDC delegation led by Co-Chair Layla Qaraman, and including Deputy Co-Chairs Presidents Janda Muhammad and Afram Ishaq…
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September 30, 2026 at 3:15 PM
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Key-Insulated and Privacy-Preserving Signature Scheme with Publicly Derived Public Key, Revisited: Consistency, Outsider Strong Unforgeability, and Generic Construction (Keita Emura) ia.cr/2024/2019
Abstract. Liu et al. (EuroS&P 2019) introduced Key-Insulated and Privacy-Preserving Signature Scheme with Publicly Derived Public Key (PDPKS) to enhance the security of stealth address and deterministic wallet. In this paper, we point out that the current security notions are insufficient in practice, and introduce a new security notion which we call consistency. Moreover, we explore the unforgeability to provide strong unforgeability for outsider which captures the situation that nobody, except the payer and the payee, can produce a valid signature. From the viewpoint of cryptocurrency functionality, it allows us to implement a refund functionality. Finally, we propose a generic construction of PDPKS that provides consistency and outsider strong unforgeability. The design is conceptually much simpler than known PDPKS constructions. It is particularly note that the underlying strongly unforgeable signature scheme is required to provide the strong conservative exclusive ownership (S-CEO) security (Cremers et al., IEEE S&P 2021). Since we explicitly require the underlying signature scheme to be S-CEO secure, our security proof introduces a new insight of exclusive ownership security which may be of independent interest. As instantiations, we can obtain a pairing-based PDPKS scheme in the standard model, a discrete-logarithm based pairing-free PDPKS scheme in the random oracle model, and a lattice-based PDPKS scheme in the random oracle model, and so on. Image showing part 2 of abstract.
December 13, 2024 at 12:49 PM
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Generic Construction of CCA-Secure PKE from Key-Insulated and Privacy-Preserving Signatures with Publicly Derived Public Key (Ryo Mizuno, Keita Emura) ia.cr/2026/922
Abstract. To enhance the security of stealth addresses and protect user privacy, Liu et al. (EuroS&P 2019) proposed a Key-Insulated and Privacy-Preserving Signature Scheme with Publicly Derived Public Keys (PDPKS). In this scheme, the payee generates a master public/secret key pair, and the payer derives a public key from the payee’s master public key and binds the cryptocurrency asset to the resulting derived public key. The payee then verifies, using the master secret key, whether the derived public key has been correctly generated from the master public key. In this paper, we show that a public-key encryption (PKE) scheme secure against chosen-ciphertext attacks (CCA) can be generically constructed from PDPKS. Specifically, we utilize unlinkability, which hides the master public key from which a derived public key originates, to conceal plaintext information from ciphertexts. We also simulate the decryption oracle by leveraging the derived public key checking algorithm. In addition, to guarantee the correctness of the proposed PKE scheme, we rely on the consistency of PDPKS introduced by Emura (IACR CiC 2025). Given the motivation behind PDPKS, namely the construction of stealth addresses in a provably secure manner, unlinkability is regarded as the core security property of PDPKS. Our result shows that achieving this core security property essentially requires CCA-secure PKE, or cryptographic primitives of equivalent strength, and that such primitives are indispensable for constructing PDPKS. Image showing part 2 of abstract.
May 14, 2026 at 1:25 PM
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June 13, 2025 at 7:25 PM
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🔵Şandeya KNK`ê serdana navendên PDPKS, ENKS û Yekîtî kir, mijara Konferansa Yekrêzî û Yekhelwesta Kurdî li Rojava û banga “Aştî û Civaka Demokratîk” ji mijarên serdanan bûn. Şande partiyên navborî vexwendî kongreya xwe jî kir.
April 30, 2025 at 11:46 AM