Episode 8: Breaking Elliptic-Curve Signatures With LadderLeak!
LadderLeak is a new attack that exploits side channels present in
ECDSA, claiming to allow real-world breaking of ECDSA with less
than a bit of nonce leakage. But what does “less than a bit” mean
in this context? Is LadderLeak really that effective at bre
42 Minuten
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In-depth, substantive discussions on the latest news and research in applied cryptography.
Beschreibung
vor 5 Jahren
Elliptic-curve signatures have become a highly used cryptographic
primitive in secure messaging, TLS as well as in cryptocurrencies
due to their high speed benefits over more traditional signature
schemes. However, virtually all signature schemes are known to be
susceptible to misuse, especially when information about the nonce
is leaked to an attacker. LadderLeak is a new attack that exploits
side channels present in ECDSA, claiming to allow real-world
breaking of ECDSA with less than a bit of nonce leakage. But what
does “less than a bit” mean in this context? Is LadderLeak really
that effective at breaking ECDSA, with so little information to go
on? Joining us this episode are LadderLeak co-authors Akira
Takahashi, Mehdi Tibouchi and Yuval Yarom to discuss these
questions and more. Links and papers discussed in the show: *
LadderLeak: Breaking ECDSA With Less Than One Bit Of Nonce Leakage
(https://eprint.iacr.org/2020/615) Music composed by Toby Fox and
performed by Sean Schafianski
(https://seanschafianski.bandcamp.com/). Special Guests: Akira
Takahashi, Mehdi Tibouchi, and Yuval Yarom.
primitive in secure messaging, TLS as well as in cryptocurrencies
due to their high speed benefits over more traditional signature
schemes. However, virtually all signature schemes are known to be
susceptible to misuse, especially when information about the nonce
is leaked to an attacker. LadderLeak is a new attack that exploits
side channels present in ECDSA, claiming to allow real-world
breaking of ECDSA with less than a bit of nonce leakage. But what
does “less than a bit” mean in this context? Is LadderLeak really
that effective at breaking ECDSA, with so little information to go
on? Joining us this episode are LadderLeak co-authors Akira
Takahashi, Mehdi Tibouchi and Yuval Yarom to discuss these
questions and more. Links and papers discussed in the show: *
LadderLeak: Breaking ECDSA With Less Than One Bit Of Nonce Leakage
(https://eprint.iacr.org/2020/615) Music composed by Toby Fox and
performed by Sean Schafianski
(https://seanschafianski.bandcamp.com/). Special Guests: Akira
Takahashi, Mehdi Tibouchi, and Yuval Yarom.
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