KR Amit Singh Bhati

Cryptography Research Scientist at 3MI Labs, Belgium |
Postdoctoral Affiliate at COSIC, KU Leuven

[KR Amit Singh Bhati @kr_ams]

@PratyushRT 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

[Akash Madhusudan @AkashMVerma1]

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Same stream. Same operator. Completely different experience.

[Cosic.be @CosicBe]

Amit Singh Bhati (@kr_ams) presenting "Breaking the IEEE Encryption Standard -- XCB-AES in Two Queries" at #crypto 2025 in Santa Barbara.
https://t.co/ohJy3YsP7f

[3MI Labs @3miLabs]

Congrats @kr_ams!

[KR Amit Singh Bhati @kr_ams]

@CosicBe 🔗 Slides - https://t.co/AnEE3G1z8F

Faster. More Secure. Beyond the Birthday Bound. 🦾

Our Sonikku family is designed for optimal performance across diverse applications, including those requiring small resource footprints🤏, ultra-low latency🏎️, and high throughput🌊.

[Cosic.be @CosicBe]

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 - https://t.co/DH3cpgFsVc
🔗 Event - https://t.co/hLqqUeJ2Np

[Cosic.be @CosicBe]

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!
👉 https://t.co/6BsyqMKvz8
#IEEE #Standardization #XCB #XCB_AES #cosic #kuleuven

[KR Amit Singh Bhati @kr_ams]

@PratyushRT This lack of acknowledgment persisted, only rectified in April 2025 after an IACR ethics investigation established the truth. The strong similarities between ePrint [2024/1527] and [2024/1554], combined with the proven misconduct, cast a deep shadow on 1527's celebrated findings.

[KR Amit Singh Bhati @kr_ams]

@PratyushRT 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

[KR Amit Singh Bhati @kr_ams]

@PratyushRT Here is a short description of our attack:

[KR Amit Singh Bhati @kr_ams]

@PratyushRT We also sent the attack to IEEE and XCB authors for coordinated vulnerability disclosure (Sep 9). The authors confirmed, but sadly, we still haven't received a response from IEEE which delayed the publishing of our attack on ePrint.

[KR Amit Singh Bhati @kr_ams]

Here is a short description of our attack 😃:

[KR Amit Singh Bhati @kr_ams]

Check out our XCB-AES IEEE standard attack on ePrint: https://t.co/oHaQctSIUE

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.

[KR Amit Singh Bhati @kr_ams]

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.

[KR Amit Singh Bhati @kr_ams]

@CosicBe Here is a short description of this attack:

[Bart Preneel @bpreneel1]

The same result is also presented on https://t.co/hiDnWEzt2G
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).

[Cosic.be @CosicBe]

Some pictures of Amit Singh Bhati presenting "Skye: An Expanding PRF based Fast KDF and its Applications" at ACM @ASIACCS2024 in Singapore today.

[Cosic.be @CosicBe]

🌐🔑Amit Singh Bhati will be presenting "Skye: An Expanding PRF based Fast KDF and its Applications" at ACM @ASIACCS2024 in Singapore tomorrow.
(ePrint - https://t.co/z6zb0162Rd)
#Cybersecurity #Cryptography #KeyDerivation #SignalProtocol #IoT

[Cosic.be @CosicBe]

✨Introducing **Skye**: a provably secure and highly optimized key derivation function for source-specific apps like Signal! 📱🔐