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Conversion Schemes for Unlinkable Signatures That Include Revocable Unlinkability

K. CHIDA
2006 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
Revocable unlinkability provides a condition in which multiple messages signed using an unlinkable anonymous signature are unlinkable for anyone except the unlinkability revocation manager.  ...  This paper introduces the concept of "revocable unlinkability" for unlinkable anonymous signatures and proposes a generalized scheme that modifies the signatures to include revocable unlinkability.  ...  unlinkable anonymous signatures with revocable unlinkability.  ... 
doi:10.1093/ietfec/e89-a.1.90 fatcat:lonohdvapngmxbhrmkkc2jm6zq

On the Unlinkability of Fingerprint Shell

Sanghoon Lee, Ik Rae Jeong
2020 Security and Communication Networks  
A cancelable biometric transformation should satisfy four requirements: unlinkability, revocability, noninvertibility, and performance.  ...  In this paper, we show that all of the shell fingerprint schemes presented by Moujahdi et al. and Ali et al. do not satisfy the condition of unlinkability.  ...  In other words, it is called unlinkability. We use unlinkability, which is more intuitive than diversity.  ... 
doi:10.1155/2020/8256929 fatcat:pecaorcdgfbexi76ku6gehmfwi

Minimal unlinking pathways as geodesics in knot polynomial space

Xin Liu, Renzo L. Ricca, Xin-Fei Li
2020 Communications Physics  
geodesic flows in a suitably defined knot polynomial space, we show that a new measure of topological complexity allows accurate quantification of the probability of decay pathways by selecting the optimal unlinking  ...  Surprisingly, similar unlinking patterns were then observed also in classical vortex dynamics, superfluids, and condensates 6, 7 .  ...  Fig. 3 3 Alternative unlinking pathways. Paths from torus link T (2, 6) to the unknot T(2,1) (diagram adapted from ref. 2 ).  ... 
doi:10.1038/s42005-020-00398-y fatcat:r6bmsbtdnva73fi4k2qecbwb5u

The Impact of Unlinkability on Adversarial Community Detection: Effects and Countermeasures [chapter]

Shishir Nagaraja
2010 Lecture Notes in Computer Science  
to learn community membership.  ...  community membership in a social network.  ...  The property of communication unlinkability offered by current anonymous communication infrastructure only hides the communication endpoints, not the existence of communication.  ... 
doi:10.1007/978-3-642-14527-8_15 fatcat:pkyya7qn75eericxn3z7curave

An Analysis for Anonymity and Unlinkability for a VoIP Conversation [chapter]

Ge Zhang
2010 IFIP Advances in Information and Communication Technology  
Similarly to other Internet applications, VoIP users may desire to be unlinkable with their participated VoIP session records for privacy issues.  ...  A RTCP communication generally uses a different communication channel from voice data communication.  ...  or callee), each VoIP session is unlinkable.  ... 
doi:10.1007/978-3-642-14282-6_16 fatcat:65lb5ja4qvexnfe4zrjwdawnri

Unlinkability and Real World Constraints in RFID Systems

Yasunobu Nohara, Sozo Inoue, Hiroto Yasuura
2007 Fifth Annual IEEE International Conference on Pervasive Computing and Communications Workshops (PerComW'07)  
Unlinkability, the property that prevents an adversary recognizing whether outputs are from the same user, is an important concept in RFID.  ...  There are many proposed schemes that provide unlinkability, however most of the schemes don't consider constraints of the real world.  ...  Since RFID Systems utilize wireless communication, an adversary can easily read the IDs of primitive RFID tags.  ... 
doi:10.1109/percomw.2007.122 dblp:conf/percom/NoharaIY07 fatcat:bbeqo7lzprehhg7ulm77zbqvde

An Efficient On-Line Electronic Cash with Unlinkable Exact Payments

T. NAKANISHI
2005 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
For customers' privacy, the e-cash system should satisfy unlinkability, i.e., any pair of payments is unlinkable w.r.t. the sameness of the payer.  ...  In an existing offline system with unlinkable exact payments, the customers need massive computations.  ...  The merits of the off-line type are that the payment communications are distributed, and that the payments are performed without a global communication channel.  ... 
doi:10.1093/ietfec/e88-a.10.2769 fatcat:gafg5idba5hfvc6ofypzvtond4

Anonymous and Unlinkable Membership Authentication with Illegal Privilege Transfer Detection

Sung-Ming Yen, Tsung-Min Kuo, Tzu-Yu Yang
2018 International Journal of Communications, Network and System Sciences  
Communications, Network and System Sciences  ...  Security requirements [12] [13] Proposed scheme Anonymity Yes Yes Yes Unforgeability Yes Yes Yes Strong/weak unlinkability Weak unlinkability Weak unlinkability Strong unlinkability  ... 
doi:10.4236/ijcns.2018.112002 fatcat:qdfp6hurkbguli6hgxsmipb3ue

A Short Verifier-Local Revocation Group Signature Scheme with Backward Unlinkability

T. NAKANISHI, N. FUNABIKI
2007 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
In this paper, we propose VLR group signature schemes with the backward unlinkability from bilinear maps.  ...  Model and Security Definitions We show a model of VLR group signature scheme with backward unlinkability, which is extended from a model of VLR group signature scheme proposed in [7]. Definition 1.  ...  Therefore, backward unlinkability is achieved.  ... 
doi:10.1093/ietfec/e90-a.9.1793 fatcat:7s2vk4oatje6dj4z4qebuajspq

Verifier-Local Revocation Group Signature Schemes with Backward Unlinkability from Bilinear Maps

T. NAKANISHI, N. FUNABIKI
2007 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
In this paper, we propose VLR group signature schemes with the backward unlinkability from bilinear maps.  ...  Model and Security Definitions We show a model of VLR group signature scheme with backward unlinkability, which is extended from a model of VLR group signature scheme proposed in [7]. Definition 1.  ...  Therefore, backward unlinkability is achieved.  ... 
doi:10.1093/ietfec/e90-a.1.65 fatcat:q7u3ctyravgwbldkgap5lbpkzu

Changing effect of the numerator–denominator bias in unlinked data on mortality differentials by education: evidence from Estonia, 2000–2015

Domantas Jasilionis, Mall Leinsalu
2020 Journal of Epidemiology and Community Health  
unlinked estimates reported in this study warn that this type of evidence cannot be readily used for monitoring changes in mortality inequalities.  ...  These biases led to substantial distortions in range-type inequality measures, whereas unlinked and linked Gini-type measures showed somewhat closer agreement.ConclusionsThe changing distortions in the  ...  For unlinked estimates, education of the deceased stemmed from death records.  ... 
doi:10.1136/jech-2020-214487 pmid:32699139 fatcat:7qr3nmqmozfvdojebxs7dcflri

Towards Anonymous, Unlinkable, and Confidential Transactions in Blockchain

Kalpana Singh, Nicolas Heulot, Elyes Ben Hamida
2018 2018 IEEE International Conference on Internet of Things (iThings) and IEEE Green Computing and Communications (GreenCom) and IEEE Cyber, Physical and Social Computing (CPSCom) and IEEE Smart Data (SmartData)  
We propose a novel security and privacy-preserving protocol for the blockchain that addresses the limitations of existing approaches, mainly the anonymity and unlinkability of users' identities and the  ...  Then our protocol satisfies the unlinkability.  ...  This communication is delineated in Figure 2 . This section analyses the privacy and security of our protocol.  ... 
doi:10.1109/cybermatics_2018.2018.00274 dblp:conf/ithings/SinghHH18 fatcat:lxv4xpeugvertc7jwqhzzoxmeq

Toward Unlinkable ID Management for Multi-Service Environments

Y. Nohara, S. Inoue, H. Yasuura
Third IEEE International Conference on Pervasive Computing and Communications Workshops  
In this paper, we propose an unlinkable ID management scheme for multi-service environments.  ...  Our scheme provides unlinkability of users' accesses against third-party service providers, by preparing different user IDs for each service, and by using cryptographic protocol to exchange the ID between  ...  Proceedings of the 3rd Int'l Conf. on Pervasive Computing and Communications Workshops (PerCom 2005 Workshops) 0-7695-2300-5/05 $20.00 © 2005 IEEE  ... 
doi:10.1109/percomw.2005.84 dblp:conf/percom/NoharaIY05 fatcat:3cgexm36hjfohb2e7adrsy7u7e

Linked versus unlinked hospital discharge data on hip fractures for estimating incidence and comorbidity profiles

Trang Vu, Lesley Day, Caroline F Finch
2012 BMC Medical Research Methodology  
in community-dwelling older people aged 65+ years and determine the prevalence of comorbidity in patients.  ...  Community-dwelling status was defined as living in private residence, supported residential facilities or special accommodation but not in nursing homes.  ...  NA - Table 3 3 Comorbidities in community-dwelling older people hospitalised for fall-related hip fracture by data source Comorbidity Linked data Unlinked data Unlinked data Unlinked data Unlinked  ... 
doi:10.1186/1471-2288-12-113 pmid:22853324 pmcid:PMC3464601 fatcat:xnp5itabonbjdbmkj4vrgijd54

Relative role of border restrictions, case finding and contact tracing in controlling SARS-CoV-2 in the presence of undetected transmission [article]

Rachael Pung, Hannah E. Clapham, Vernon J. Lee, Adam J Kucharski, CMMID COVID-19 working group
2021 medRxiv   pre-print
At the height of the outbreak, the ratio of missed to notified infections was 34.1 (95%CI 26.0-46.6) but the ratio of unlinked to linked infections was 0.81 (95%CI 0.59-1.36).  ...  Methods Combining data on notified local COVID-19 cases with known and unknown sources of infections (i.e. linked and unlinked cases) in Singapore in 2020 with a transmission model, we reconstructed the  ...  unlinked cases, unlink). 39 .  ... 
doi:10.1101/2021.05.05.21256675 fatcat:cvswzmmgjjd3jj3ssxhy3ou7oq
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