SIKA at TU München

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Countermeasures on the level of implementation/circuit design idea

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Which are the steps for Classical Second Order attacks?

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Which element of the security pyramid has the most abstract level
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Exemplary flashcards for SIKA at the TU München on StudySmarter:

Countermeasures on the level of cryptographic primitives

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If the correlation is reduced by square(2) how much the number of traces is changed?

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Which are the conditions that fulfill the scope of masking against DPA?

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What is DPA?
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Exemplary flashcards for SIKA at the TU München on StudySmarter:

What is the solution for DPA when attacking multiple pair of bits?

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Mention the layers of the security pyramid (abstraction level).

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Specify the element of the security pyramid from the less abstract to more abstract.

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What exploits DPA?
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What does the strongest attacks on AES require to reveal the entire key?

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Exemplary flashcards for SIKA at the TU München on StudySmarter:

SIKA

Countermeasures on the level of implementation/circuit design idea
Algebraic: -Masking intermediate values - boolean masking -Randomization intermediate values - blinding in RSA Hiding: -Ab initio intermediate values - reduce leakage at source using special circuit styles -Ad hoc intermediate values - add noise to reduce SNR (signal noise ratio) -shuffle independent operations

SIKA

Which are the steps for Classical Second Order attacks?
1. Preprocessing: use a combination function to combine points of the power trace (ex. : absolute difference, normalized product ... ) 2.Genuine DPA attack: Perform a first-order DPA attack on the pre-processed power trace.

SIKA

Which element of the security pyramid has the most abstract level
Apps

SIKA

Countermeasures on the level of cryptographic primitives
Research just getting started. Crypto primitives are developed. Assumption: The leakage of the key is bounded (the key can be used at least once without revealing the entire key to the attacker.

SIKA

If the correlation is reduced by square(2) how much the number of traces is changed?
The number of traces is doubled.

SIKA

Which are the conditions that fulfill the scope of masking against DPA?
1. Masks are uniformly distributed. 2.There is no simultaneous power consumption of the masked value and the mask. 3.The implementation is done carefully

SIKA

What is DPA?
DPA is a statistical method for analyzing sets of measurements to identify data-dependent correlations

SIKA

What is the solution for DPA when attacking multiple pair of bits?
Linear Coreelation Coefficient = CPA (Pearson's Correlation Coefficient)

SIKA

Mention the layers of the security pyramid (abstraction level).
Physical security of implementation: -Semiconductor Physics -Circuit Design/Logic Styles -Basic Arithmetic Units Cryptography: -Crypto Primitives -Protocols Apps

SIKA

Specify the element of the security pyramid from the less abstract to more abstract.
Semiconductor Circuit design / logic style Basic Arithmetic Units Crypto Primitives Protocols Apps

SIKA

What exploits DPA?
The power consumption of processing of intermediate values in crypto-algorithm.

SIKA

What does the strongest attacks on AES require to reveal the entire key?
Require either: -two pair of ciphertext/faulty text-pairs -one ciphertext/faulty text pair and the corresponding plaintext

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Ringvorlesung Systemsicherheit

System on Chip Technologies

System Design For The Internet Of Things

SIWA at

Hochschule München

SE - Annika at

TU Hamburg-Harburg

SIA at

hochschule 21

SIA at

hochschule 21

SIWAWI at

Ostfalia Hochschule

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