Sebastian Pape's Authentication in Insecure Environments: Using Visual PDF

By Sebastian Pape

ISBN-10: 365807115X

ISBN-13: 9783658071158

ISBN-10: 3658071168

ISBN-13: 9783658071165

Sebastian Pape discusses varied situations for authentication. at the one hand, clients can't belief their units and however are looking to be capable to do safe authentication. nonetheless, clients won't are looking to be tracked whereas their merchant doesn't wish them to proportion their credentials. Many clients will not be in a position to make sure even if their machine is reliable, i.e. it could comprise malware. One answer is to exploit visible cryptography for authentication. the writer generalizes this idea to human decipherable encryption schemes and establishes a dating to CAPTCHAS. He proposes a brand new safeguard version and offers the 1st visible encryption scheme which uses noise to complicate the adversary's activity. to avoid carrier prone from maintaining their clients below surveillance, nameless credentials can be utilized. besides the fact that, occasionally it's fascinating to avoid the clients from sharing their credentials. the writer compares present ways in keeping with non-transferable nameless credentials and proposes an procedure which mixes biometrics and smartcards.

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Extra resources for Authentication in Insecure Environments: Using Visual Cryptography and Non-Transferable Credentials in Practise

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29. (Finite Group and Group Order) Let (G, ◦) be a group. We say G is a finite group if G has a finite number of elements. We denote the number of elements in G with |G| and denote it as the order of the group G. 30. (Subgroup) Let (G, ◦) be a group. We say G is a subgroup of G if G ⊆ G and G itself is a group under the same operation associated with G. If additionally G ⊂ G holds, we call G a strict subgroup of G. Since associativity (and commutativity) are inherited from G, one need to verify closure and the existence of identity and inverse to check that G is a subgroup of G.

2) and one ore more trusted certification authority is referred to as key management and results in a public key infrastructure (PKI). This in general includes procedures to create, manage, store, distribute, and revoke digital certificates [MvOV97, TS08]. In practise, asymmetric encryption schemes are computationally more intensive than symmetric encryption schemes, and thus, substantially slower (typically by a factor of hundreds to thousands times). Hence, a widespread use of asymmetric encryption schemes is, to transport keys of a symmetric encryption scheme, which are later used for encrypting bulk data [MvOV97].

Finite Group and Group Order) Let (G, ◦) be a group. We say G is a finite group if G has a finite number of elements. We denote the number of elements in G with |G| and denote it as the order of the group G. 30. (Subgroup) Let (G, ◦) be a group. We say G is a subgroup of G if G ⊆ G and G itself is a group under the same operation associated with G. If additionally G ⊂ G holds, we call G a strict subgroup of G. Since associativity (and commutativity) are inherited from G, one need to verify closure and the existence of identity and inverse to check that G is a subgroup of G.

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Authentication in Insecure Environments: Using Visual Cryptography and Non-Transferable Credentials in Practise by Sebastian Pape


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