Search: “broadcast encryption”

2 stories

Searchkeyword smart Sortlatest hot importance relevance

DomainAll Cyber AIWindow24h 3d 7d 30d AllIn the wild Important only Show duplicates

CategoryAll Malware 61 Vulnerability 54 Ransomware 45 Exploit / PoC 43 Policy & legal 34 Threat actor 23 Industry 16 Research 10 Phishing & fraud 9 Data breach 9 Advisory 2 Tools 1

SeverityAll critical 120 high 75 medium 57 low 53 info 2

Large Universe Subset Predicate Encryption with IND-CCA Security (with Constant-size Ciphertext and Keys)

New construction achieves first large-universe subset predicate encryption with IND-CCA security and constant-size ciphertexts and keys under subgroup decision assumptions.

The paper proposes the first large-universe subset predicate encryption scheme achieving IND-CCA security with both constant-size ciphertexts and constant-size secret keys. Prior large-universe constructions by Chatterjee and Mukherjee either achieved only restricted selective security with constant sizes or adaptive security with attribute-dependent ciphertext size, and none achieved CCA security. The new construction is proven selectively secure under standard subgroup decision problems. Black-box transformations yield the first CCA-secure WIBE and WKD-IBE with constant-size ciphertexts and keys.

arXiv cs.CRSep 14, 10:02 UTC · 3d agoResearch

Brazil orders Discord to suspend livestreaming after teen suicide

Brazil's data protection authority orders Discord to disable its Go Live livestreaming feature nationwide until child-safety safeguards are demonstrated.

Brazil's National Data Protection Authority (ANPD) found robust evidence that Discord failed to protect children from harmful content and ordered the Go Live feature suspended until effective safeguards are shown, following the July death of a 13-year-old girl during a roughly 45-minute livestream; five teenagers were arrested. Discord has three business days to implement the suspension and could face fines of up to 50 million reais (about $10 million) per violation. Regulators criticized the March addition of end-to-end encryption to Go Live for limiting real-time content detection, and are also investigating Discord's age-verification and content-removal practices, while a parallel probe tied neo-Nazi recruitment communities to Telegram.

The RecordAug 13, 13:48 UTC · Aug 13, 2026Policy & legal