CRYPTOGRAPHY TODAY

Daily roundup · 5 edition(s)

2026-10-21

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Cryptography Today — Oct 21, 2026

Eight eMudhra intermediate certificates turned out to use weak keys: a reminder that a CA is only as strong as its worst key ceremony.

🔐 Security & attacks
• [LINK] 8 eMudhra certificates are compromised (Cloudflare)
• [LINK] Possible new Cellebrite iPhone radio zero-day

🧮 Post-quantum
• [LINK] FN-DSA on Arm Cortex-M55 with native FP64 and Helium

₿ Bitcoin
• [LINK] Cost-bounded transaction filtering language
• [LINK] BFT finality in a confidential UTXO state machine
• [LINK] TCP hole punching for nodes behind home NATs

Ξ Ethereum research
• [LINK] BRO-AMM: a bonded reconciliation oracle AMM

What did I miss? Drop it below.
#Cryptography #PostQuantum #Bitcoin #ZeroKnowledge

2026-10-20

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Cryptography Today — Oct 20, 2026

A new paper shows how inconsistent MAC keys can compromise privacy in SPDZ-family MPC: this week the breaks are in keys and leakage, not in the math.

🔐 Security & attacks
• [LINK] Off-Key: inconsistent MAC keys compromise privacy in SPDZ-family MPC
• [LINK] Eevee: deterministic forgeries against nonce-misuse security
• [LINK] DPA-style attacks on VOLE-in-the-Head signature schemes

🧮 Post-quantum
• [LINK] How secure are NTRU+ keys? The best module attacks
• [LINK] Sparse secrets, dense problems: masking HQC in hardware
• [LINK] PQ anonymity for stealth address protocols
• [LINK] Faster, aggregatable and quantum-safe privacy pools

₿ Bitcoin
• [LINK] SwiftSync: speeding up IBD with pre-generated hints (PoC)
• [LINK] Implicit deletions and improvements in Utreexo IBD

🤖 AI & security
• [LINK] Training AIs to solve CAPTCHAs

What did I miss? Drop it below.
#Cryptography #PostQuantum #Bitcoin #ZeroKnowledge

2026-10-16

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Cryptography Today — Oct 16, 2026

The NIST elliptic curve seeds are no longer a mystery: the bounty has been claimed, and they turn out to be drand48() output seeded with a 1997–98 timestamp, not the hash of a secret phrase.

🔐 Security & attacks
• [LINK] NIST curve seeds bounty claimed: it was drand48()
• [LINK] Backdooring open-weight AI models

₿ Bitcoin
• [LINK] TCP hole punching for nodes behind home NATs
• [LINK] Bitcoin-rs: an independent full node in Rust

Ξ Ethereum research
• [LINK] Priority fees and tx classification, Jul 2025–Oct 2026

A quiet day otherwise. What did I miss? Drop it below.
#Cryptography #Bitcoin #Ethereum #AISecurity

2026-10-15

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Cryptography Today — Oct 15, 2026

Threshold ECDSA that stays robust with a third of signers malicious, built for bridge-scale signer sets, leads a quiet but useful day.

🔐 Security & attacks
• [LINK] Structural cryptanalysis of the Eevee AEAD family
• [LINK] Reaction attack on CKKS deployments
• [LINK] Measuring human cryptanalysis effort (via Schneier)

🧮 Post-quantum
• [LINK] Fault injection on HQC and BIKE beyond Fujisaki-Okamoto
• [LINK] FAEST signatures on GPUs

₿ Bitcoin
• [LINK] Silent Payments for multiparty wallets
• [LINK] Open-source multisig coordinator with a live signet demo

📄 New papers (IACR ePrint)
• [LINK] Robust ECDSA threshold signing at scale
• [LINK] Speeding up sumcheck using algebraic geometry

What did I miss? Drop it below.
#Cryptography #PostQuantum #Bitcoin #ZeroKnowledge

2026-10-14

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Cryptography Today — Oct 14, 2026

AI is coming for cryptanalysis (or is it?), post-quantum credentials get device binding, and someone wants Bitcoin vaults without trusted bridges.

🔐 Security & attacks
• [LINK] Package managers have an integrity problem (25 managers tested)
• [LINK] The future of AI cryptanalysis

🧮 Post-quantum
• [LINK] Issuer-hiding blind signatures from ML-DSA and VOLE-in-the-Head
• [LINK] Nowhere Man: device binding for post-quantum anonymous credentials
• [LINK] What does "post-quantum" mean for a Bitcoin L2 settling on a non-PQ L1?

₿ Bitcoin
• [LINK] Trustless Bitcoin Vaults
• [LINK] Bitcoin Core 32.0rc4 is now available

📄 Also on ePrint
• [LINK] Secret sharing from non-extractable randomness
• [LINK] Tamper-sensing meshes in payment terminals

What did I miss? Drop it below.
#Cryptography #PostQuantum #Bitcoin #ZeroKnowledge #AppliedCryptography