Identity Based Signature
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Proposta de um mecanismo de segurança alternativo para o SIP utilizando o protocolo Massey-Omura aperfeiçoado com o uso de emparelhamentos bilineares. / A proposal of an alternative security mechanism for SIP by using the Massey-Omura protocol enhanced by bilinear pairings.
Voz sobre IP (ou VoIP) vem sendo adotada progressivamente não apenas por um grande número de empresas mas também por um número expressivo de pessoas, no Brasil e em outros países. Entretanto, essa crescente adoção de VoIP no mundo traz consigo algumas preocupações tais como ameaças e riscos de segurança, sobretudo no que diz respeito à autenticid
Publicado em: 2010
-
2. Autenticação do remetente em servidor de e-mail com assinatura baseada na identidade
Frente ao grande volume de mensagens não solicitadas que invadem as caixas postais de usuários na Internet, pesquisam-se mecanismos que impeçam ou dificultem a entrega destas mensagens. A autenticação de remetentes, apesar de não evitar diretamente a entrega, estabelece confiança nos endereços permitindo que se usem listas de reputação. Este trabal
Publicado em: 2009
-
3. Identity-based cryptography environment. / Um ambiente criptográfico baseado na identidade.
The accelerated growth of Internet-based business increase significantly the need for mechanisms that can guarantee the data confidentiality, providing tools for authenticity and non-repudiation users in any medium of communication, even with computer resources becoming increasingly scarce, eg into a cell phone. This paper describes an encryption scheme that
Publicado em: 2008
-
4. Personal authentication based on sound of signature / Autenticação pessoal baseada no som da assinatura
A signature is the most used way to validate a person?s identity, since the style of every individual signature constitutes a biometric entity, whichcan be used to differentiate one person from another. This research work presents a method to accomplish the personal authentication using the sound produced when a person is signing. During this event, the fric
Publicado em: 2006
-
5. "Proposal for encryption and signature schemes under certificateless public key cryptography model" / "Proposta de esquemas de criptografia e de assinatura sob modelo de criptografia de chave pública sem certificado"
Under the model of Identity Based Cryptography (ID-PKC), the public key can be the user s identity, therefore it does not require a Public Key Infrastructure (PKI) with its complex management of Digital Certificates. On the other hand, this system requires a Private Key Generator (PKG), a trusted authority who is in possession of a master key and can generat
Publicado em: 2006
-
6. ComposiÃÃo de biometrias para sistemas multimodais de verificaÃÃo de identidade pessol
This work presents contributions for the problem of identity verification thought an architecture that combines face, signature and keystroke dynamics. The first two biometrics were chosen based on the fact that they are already integrated in the society, besides the equipment to capture these modalities are cheap. The third biometrics chosen, keystroke dyna
Publicado em: 2005
-
7. New Klebsiella oxytoca β-Lactamase Genes blaOXY-3 and blaOXY-4 and a Third Genetic Group of K. oxytoca Based on blaOXY-3
The two genetic groups (oxy-1 and oxy-2) previously identified in the Klebsiella oxytoca taxon are recognizable by four independent molecular markers: (i) ERIC-1R profiles, (ii) 16S ribosomal DNA (rDNA) signature sequences, (iii) singular nucleotides in a defined fragment of the rpoB gene, and (iv) the type of the strain's blaOXY gene (i.e., blaOXY-1 or blaO
American Society for Microbiology.
-
8. Unique Ion Signature Mass Spectrometry, a Deterministic Method to Assign Peptide Identity
The growing use of selected reaction monitoring (SRM) mass spectrometry in proteomic analyses led us to investigate how to identify peptides by SRM using only a minimal number of fragment ions. By using a computational model of the SRM work flow we computed the potential interferences from other peptides in a given proteome. From these results, we selected t
The American Society for Biochemistry and Molecular Biology.
-
9. Sequence-specific "gene signatures" can be obtained by PCR with single specific primers at low stringency.
Low-stringency single specific primer PCR (LSSP-PCR) is an extremely simple PCR-based technique that detects single or multiple mutations in gene-sized DNA fragments. A purified DNA fragment is subjected to PCR using high concentrations of a single specific oligonucleotide primer, large amounts of Taq polymerase, and a very low annealing temperature. Under t
-
10. Characterization of the RNA-Binding Domains in the Replicase Proteins of Tomato Bushy Stunt Virus†
Tomato bushy stunt virus (TBSV), a tombusvirus with a nonsegmented, plus-stranded RNA genome, codes for two essential replicase proteins. The sequence of one of the replicase proteins, namely p33, overlaps with the N-terminal domain of p92, which contains the signature motifs of RNA-dependent RNA polymerases (RdRps) in its nonoverlapping C-terminal portion.
American Society for Microbiology.
-
11. Human RNase 7: a new cationic ribonuclease of the RNase A superfamily
Here we report on the expression and function of RNase 7, one of the final RNase A superfamily ribonucleases identified in the human genome sequence. The human RNase 7 gene is expressed in various somatic tissues including the liver, kidney, skeletal muscle and heart. Recombinant RNase 7 is ribonucleolytically active against yeast tRNA, as expected from the
Oxford University Press.
-
12. Odor maps of aldehydes and esters revealed by functional MRI in the glomerular layer of the mouse olfactory bulb
Odorant identity is believed to be encoded in the olfactory bulb (OB) by glomerular activity patterns. It has not yet been possible to visualize and compare entire patterns for different odorants in the same animal because of technical limitations. For this purpose we used high-resolution functional MRI at 7 T, combined with glomerular-layer flat maps, to re
National Academy of Sciences.