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## Diﬀerential Current-Signal Logic and its application to cryptographic devices

### Krzysztof Gołofit

#### Abstract

The primary objective of this dissertation is to propose a design method, which will provide a high security level for cryptographic devices in the context of Side Channel Attacks, as well as to meet other circuit performance requirements such as: power consumption, processing time and implementation costs. The aim of the technique is to keep electromagnetic ema- nation and power supply disturbance (connected with performed computations) as low as possible, on both a global scale (for the entire circuit) and a local scale (for a single gate, including interconnections). As distinct from most known logic styles, this solution uses values represented by currents, which allows exploration of such features as Kirchhoﬀ’s sums of currents and the natural three-valued logic. However, the idea of using paired currents ﬂowing in opposite directions gives very attractive arithmetical properties when diﬀerential-current operations are applied. The ﬁrst part of the dissertation gives a survey of logic styles, a classiﬁcation by their characteristics and a comparison of: speed, power consumption, implementation costs and security. In the second part the concept of Diﬀerential Current-Signal Logic is introduced, including: diﬀerential-current arithmetic, basic gates, methods of performing binary and ternary functions, implementations of basic structures and a security evaluation. The security level was signiﬁcantly improved in comparison to standard solutions (by 2–3 orders of magni- tude) while the remain properties were kept on the same concurrent level. Distinguishing features of the presented technique include: all elementary binary functions can be perform by one gate type, eﬃcient implementations of OR and XOR functions as well as ternary addition and ternary multiplication, alternative ways of performing some functions, possibility of desynchronization and dislocation of computations and eﬃcient implementations of universal computational structures.
Record ID
WUT3d59ca31327b40bf989f16f2b25b476a
Diploma type
Doctor of Philosophy
Author
Title in Polish
Różnicowa Technika Prądowa i jej zastosowanie w układach kryptograﬁcznych
Title in English
Diﬀerential Current-Signal Logic and its application to cryptographic devices
Language
(pl) Polish
Certifying Unit
Faculty of Electronics and Information Technology (FEIT)
Discipline
electronics / (technology domain) / (technological sciences)
Status
Finished
Start date
07-10-2003
Defense Date
17-06-2014
Title date
24-06-2014
Supervisor
Internal reviewers
External reviewers
Wnuk Marian Wnuk Marian,, Undefined Affiliation
Pages
364
Keywords in English
secure cryptographic circuits, current-mode and diﬀerential-current arithmetic, power ﬂattening, minimization of electromagnetic emanation, side-channel attacks, hardware countermeasures, binary and ternary logic, logical gates and circuits, low-power circuits, universal structures and programmable arrays, desynchronization and dislocation
Abstract in English
The primary objective of this dissertation is to propose a design method, which will provide a high security level for cryptographic devices in the context of Side Channel Attacks, as well as to meet other circuit performance requirements such as: power consumption, processing time and implementation costs. The aim of the technique is to keep electromagnetic ema- nation and power supply disturbance (connected with performed computations) as low as possible, on both a global scale (for the entire circuit) and a local scale (for a single gate, including interconnections). As distinct from most known logic styles, this solution uses values represented by currents, which allows exploration of such features as Kirchhoﬀ’s sums of currents and the natural three-valued logic. However, the idea of using paired currents ﬂowing in opposite directions gives very attractive arithmetical properties when diﬀerential-current operations are applied. The ﬁrst part of the dissertation gives a survey of logic styles, a classiﬁcation by their characteristics and a comparison of: speed, power consumption, implementation costs and security. In the second part the concept of Diﬀerential Current-Signal Logic is introduced, including: diﬀerential-current arithmetic, basic gates, methods of performing binary and ternary functions, implementations of basic structures and a security evaluation. The security level was signiﬁcantly improved in comparison to standard solutions (by 2–3 orders of magni- tude) while the remain properties were kept on the same concurrent level. Distinguishing features of the presented technique include: all elementary binary functions can be perform by one gate type, eﬃcient implementations of OR and XOR functions as well as ternary addition and ternary multiplication, alternative ways of performing some functions, possibility of desynchronization and dislocation of computations and eﬃcient implementations of universal computational structures.
Thesis file
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Citation count
1

Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUT3d59ca31327b40bf989f16f2b25b476a/
URN
urn:pw-repo:WUT3d59ca31327b40bf989f16f2b25b476a

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