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Outfront starts. Right now. Outfront next, Michael Cohen set to take this this case for prosecutors. So is he ready for this moment cohens former lawyer ease out front. Loss from Stormy Daniels to the judge, the alarming growing threats targeting key players in trumps trial. And the Breaking News, a new Biden Administration report says it is reasonable to assess that israels use of us weapons in gaza could violate International Law. At least one democrat though says that report ducts the hard questions lets go out front good evening, america hill in for Erin Burnett Outfront tonight. The final...

Ring signature allows a signer to generate a signature on behalf of a set of public keys, while a verifier can verify the signature without identifying who the actual signer is. In Crypto 2021, Yuen et al. proposed a new type of ring signature scheme called DualRing. However, it lacks forward security. The security of DualRing cannot be guaranteed if the signer’s secret key is compromised. To address this problem, we introduce forward-secure DualRing, in which a signer can periodically update their secret key using a “split-and-combine” method. A practical instantiation of our scheme enj...

Public Key Encryption with Keyword Search (PEKS) makes it possible for a cloud server (CS) to match a trapdoor and a ciphertext. However, with the upgrowth of quantum techniques, most of the existing PEKS schemes will be broken by quantum computers in the coming future. Moreover, they are also under the threat of potential key exposure. Lattice-based forward secure PEKS scheme (FS-PEKS) overcomes the two problems above by combining the techniques of forward security and lattice-based cryptography. However, FS-PEKS schemes work in public key infrastructure (PKI), which will incur complicated ce...

Puncturable encryption (PE), introduced by Green and Miers at IEEE S&P 2015, allows recipients to update their decryption keys to revoke decryption capability for selected messages without communicating with senders. In general, it allows users to control which ciphertexts their keys may decrypt. The notion of PE has been found very useful in many applications, such as asynchronous messaging systems, group messaging systems, public-key watermarking schemes, secure cloud emails, and many more. In this paper, we introduce a new primitive called hierarchical identity-based puncturable encrypt...

Group encryption (GE) is a fundamental anonymity primitive analogue of group signature, which guarantees the decryption ability of recipients to specific ciphertexts while hiding these users within a crowd. Since its first birth by Kiayias et al., numerous constructions have been proposed, among which there is only one lattice-based scheme is post-quantum secure. However, the security of all these schemes will be damaged once an unexpected key-exposure attack occurs (which is extremely unavoidable in the real world). To solve this problem, we first consider a forward-secure group encryption pr...