Takao YAMASHITA


Extended Inter-Device Digital Rights Sharing and Transfer Based on Device-Owner Equality Verification Using Homomorphic Encryption
Yoshihiko OMORI Takao YAMASHITA 
Publication:   
Publication Date: 2020/06/01
Vol. E103-D  No. 6  pp. 1339-1354
Type of Manuscript:  PAPER
Category: Information Network
Keyword: 
authenticationauthorizationInternet of things (IoT)PKIdigital rights sharingdigital rights transferFIDObiometrics authentication
 Summary | Full Text:PDF(1.7MB)

Dynamic Replica Control Based on Fairly Assigned Variation of Data for Loosely Coupled Distributed Database Systems
Takao YAMASHITA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/04/01
Vol. E88-D  No. 4  pp. 711-725
Type of Manuscript:  PAPER
Category: Computer Systems
Keyword: 
data replicationweak consistencynumerical datafairnessclock synchronization
 Summary | Full Text:PDF(1.2MB)

Controlling View Divergence of Data Freshness in a Replicated Database System Using Statistical Update Delay Estimation
Takao YAMASHITA Satoshi ONO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/04/01
Vol. E88-D  No. 4  pp. 739-749
Type of Manuscript:  PAPER
Category: Database
Keyword: 
information disseminationupdate delay distributionnon-parametric estimationasynchronous updatelazy replication
 Summary | Full Text:PDF(1.1MB)

A Statistical Time Synchronization Method for Frequency-Synchronized Network Clocks in Distributed Systems
Takao YAMASHITA Satoshi ONO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2004/07/01
Vol. E87-D  No. 7  pp. 1878-1886
Type of Manuscript:  PAPER
Category: Computer Systems
Keyword: 
frequency synchronizationAllan variancefrequency stabilityconfidence intervalhypothesis testreal-time communication
 Summary | Full Text:PDF(607.4KB)