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Yet it's deeply regrettable that the paper by Peng Wang et al. has been implicated in scientific misconduct. An author of it reviewed (at an IACR venue) and used Bhati et al.'s orig. work seven months before publishing, yet Bhati et al. was not credited for discovering the attack
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KR Amit Singh Bhati retweeted
🧵
We updated ePrint 2026/1692 with new results on Poseidon: eprint.iacr.org/2026/1692
The paper introduces a new approach to round skipping which we denote (k+1)-wise collapsing and which enables round skipping in arbitrary CICO-k problems beyond CICO-1 and CICO-2.
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We updated ePrint 2026/1692 with new results on Poseidon: eprint.iacr.org/2026/1692
The paper introduces a new approach to round skipping which we denote (k+1)-wise collapsing and which enables round skipping in arbitrary CICO-k problems beyond CICO-1 and CICO-2.
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tl;dr: we present an interpolation attack on 28 out of 31 rounds of Poseidon in practical time via a novel technique for partial round skipping; see ia.cr/2026/1692. 🧵⬇
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KR Amit Singh Bhati retweeted
tl;dr: we present an interpolation attack on 28 out of 31 rounds of Poseidon in practical time via a novel technique for partial round skipping; see ia.cr/2026/1692. 🧵⬇
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KR Amit Singh Bhati retweeted
Coinbase just gave agents wallets. But wallets don't solve the real problem.
AI agents will execute millions of micro-actions per day. No blockchain, no matter how fast, can handle a separate on-chain transaction for every single one.
We built @0x4Mica. Agents transact instantly antees, and settlement happens later in batches. Thousands of micro-payments, one on-chain transaction.
In this demo, I'm streaming a video, and each data chunk is paid for in real-time. Watch what happens when I switch from 4Mica credit to raw on-chain payments, and then ask to be switched back.
Same stream. Same operator. Completely different experience.
AI agents will execute millions of micro-actions per day. No blockchain, no matter how fast, can handle a separate on-chain transaction for every single one.
We built @0x4Mica. Agents transact instantly antees, and settlement happens later in batches. Thousands of micro-payments, one on-chain transaction.
In this demo, I'm streaming a video, and each data chunk is paid for in real-time. Watch what happens when I switch from 4Mica credit to raw on-chain payments, and then ask to be switched back.
Same stream. Same operator. Completely different experience.
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KR Amit Singh Bhati retweeted
Amit Singh Bhati (@kr_ams) presenting "Breaking the IEEE Encryption Standard -- XCB-AES in Two Queries" at #crypto 2025 in Santa Barbara.
crypto.iacr.org/2025/program.p…
crypto.iacr.org/2025/program.p…
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KR Amit Singh Bhati retweeted
Congrats @kr_ams!
Congratulations to Amit Singh Bhati for successfully defending his PhD thesis "Advanced Cryptography for Modern Data Security: Provably Secure and Efficient Symmetric-Key Modes from Expanding Primitives"! 🎓🥂🥳
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KR Amit Singh Bhati retweeted
Our PhD researcher Amit Singh Bhati (@kr_ams) presented the #Sonikku family of message authentication codes (MACs) at #Arcticcrypt 2025, held in Longyearbyen, Svalbard.
Learn more:
🔗 Paper - eprint.iacr.org/2024/1980.pdf
🔗 Event - simula-uib.com/arcticcrypt202…
Learn more:
🔗 Paper - eprint.iacr.org/2024/1980.pdf
🔗 Event - simula-uib.com/arcticcrypt202…
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KR Amit Singh Bhati retweeted
Excited to announce that our paper with TU Wien on the first plaintext recovery attack against XCB-AES (IEEE 1619.2) has been accepted at #CRYPTO2025!
👉 ia.cr/2024/1554
#IEEE #Standardization #XCB #XCB_AES #cosic #kuleuven
👉 ia.cr/2024/1554
#IEEE #Standardization #XCB #XCB_AES #cosic #kuleuven
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Check out our XCB-AES IEEE standard attack on ePrint: eprint.iacr.org/2024/1554.pdf
XCB-AES is an IEEE 1619.2 standard for encryption of sector-oriented storage media. In this work, we demonstrate an attack on XCB-AES by recovering almost full plaintext within two queries.
XCB-AES is an IEEE 1619.2 standard for encryption of sector-oriented storage media. In this work, we demonstrate an attack on XCB-AES by recovering almost full plaintext within two queries.
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Thanks to the authors of XCBv2fb for their confirmation on the correctness of the attack, however, we are still waiting for an answer from IEEE.
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KR Amit Singh Bhati retweeted
The same result is also presented on eprint.iacr.org/2024/1554.pdf
It was rejected from Crypto (submission date 14 February) and was submitted to IEEE for coordinated vulnerability disclosure (but we did not get an answer).
It was rejected from Crypto (submission date 14 February) and was submitted to IEEE for coordinated vulnerability disclosure (but we did not get an answer).
This week's pick for the best paper on eprint follows up on my thread about cryptanalysis incentives: While many argue that breaks in symmetric crypto aren't a huge concern, recent events prove otherwise. Case in point: last week's break of XCB, an algorithm standardized in IEEE academic exercise - it's a real-world failure in a widely recognized standard. 1/4
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KR Amit Singh Bhati retweeted
Some pictures of Amit Singh Bhati presenting "Skye: An Expanding PRF based Fast KDF and its Applications" at ACM @ASIACCS2024 in Singapore today.
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KR Amit Singh Bhati retweeted
🌐🔑Amit Singh Bhati will be presenting "Skye: An Expanding PRF based Fast KDF and its Applications" at ACM @ASIACCS2024 in Singapore tomorrow.
(ePrint - ia.cr/2023/781)
#Cybersecurity #Cryptography #KeyDerivation #SignalProtocol #IoT
(ePrint - ia.cr/2023/781)
#Cybersecurity #Cryptography #KeyDerivation #SignalProtocol #IoT
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KR Amit Singh Bhati retweeted
✨Introducing **Skye**: a provably secure and highly optimized key derivation function for source-specific apps like Signal! 📱🔐
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🚀 Are you looking for an efficient solution to do IoT-to-Cloud secure computation??
Don't worry, we got you!
Introducing Eevee 🦊: A Friendly and Suitable Family of AEAD Modes for IoT-to-Cloud Secure Computation
Don't worry, we got you!
Introducing Eevee 🦊: A Friendly and Suitable Family of AEAD Modes for IoT-to-Cloud Secure Computation
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choose the perfect balance for your needs. 📊
🔄 Fully parallelizable decryption for optimal performance in MPC
🔐 Full block-length security, even against nonce-misuse
📜 Compact provable security analysis
🚀 Results outperforming existing solutions
🔄 Fully parallelizable decryption for optimal performance in MPC
🔐 Full block-length security, even against nonce-misuse
📜 Compact provable security analysis
🚀 Results outperforming existing solutions
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Eevee is accepted at ACM CCS 2023.🎉
Discover more with our blog - esat.kuleuven.be/cosic/blog/ev-…,
ePrint - ia.cr/2023/1361,
and repository - github.com/KULeuven-COSIC…
#IoTSecurity #EeveeModes #DataProtection #CloudComputation #Transciphering #MPCfriendly #lightweight
Discover more with our blog - esat.kuleuven.be/cosic/blog/ev-…,
ePrint - ia.cr/2023/1361,
and repository - github.com/KULeuven-COSIC…
#IoTSecurity #EeveeModes #DataProtection #CloudComputation #Transciphering #MPCfriendly #lightweight
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