Ryuta NARA


Scan-Based Side-Channel Attack against RSA Cryptosystems Using Scan Signatures
Ryuta NARA Kei SATOH Masao YANAGISAWA Tatsuo OHTSUKI Nozomu TOGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/12/01
Vol. E93-A  No. 12  pp. 2481-2489
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Logic Synthesis, Test and Verification
Keyword: 
scan-based side-channel attackscan pathtestabilitycryptosystemRSAsecurity
 Summary | Full Text:PDF

A Scan-Based Attack Based on Discriminators for AES Cryptosystems
Ryuta NARA Nozomu TOGAWA Masao YANAGISAWA Tatsuo OHTSUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/12/01
Vol. E92-A  No. 12  pp. 3229-3237
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Embedded, Real-Time and Reconfigurable Systems
Keyword: 
scan-based attackside-channel attackscan chaintestabilitysecuritycryptographyAES
 Summary | Full Text:PDF

Unified Dual-Radix Architecture for Scalable Montgomery Multiplications in GF(P) and GF(2n)
Kazuyuki TANIMURA Ryuta NARA Shunitsu KOHARA Youhua SHI Nozomu TOGAWA Masao YANAGISAWA Tatsuo OHTSUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/09/01
Vol. E92-A  No. 9  pp. 2304-2317
Type of Manuscript:  PAPER
Category: VLSI Design Technology and CAD
Keyword: 
elliptic curve cryptographydual-radixmodular multiplicationMontgomery multiplicationscalabilityunified
 Summary | Full Text:PDF