1,768,325 research outputs found
Internet X.509 Public Key Infrastructure -- LDAP Schema for PKIs
No full textThis document describes LDAP schema features that are needed to support
X.509 Public Key Infrastructures. Specifically, X.509 attribute types,
object classes, matching rules, attribute value syntaxes and attribute
value assertion syntaxes needed for PKIs are defined
Internet X.509 Public Key Infrastructure Operational Protocols -- LDAPv3
No full textThis document describes the features of the Lightweight Directory Access Protocol v3 that are needed in order to support a public key infrastructure based on X.509 certificates and CRLs
The PERMIS X.509 Based Privilege Management Infrastructure
No full textThis document describes the PERMIS X.509 Based Privilege Management Infrastructure, which is a trust management system as described in RFC 2704 [2]. The PERMIS Infrastructure is compared with the AAA Authorisation Framework described in RFC 2904 [4], and is shown to be compatible with it
The X.509 Privilege Management Infrastructure
No full textThis paper provides an overview of the Privilege Management Infrastructure (PMI) introduced in the 2000 edition of X.509. It describes the entities in the infrastructure: Sources of Authority, Attribute Authorities and Privilege Holders, as well as the basic data structure - the attribute certificate - that is used to hold privileges. The contents of attribute certificates are described in detail, including the various policy related extensions that may be added to them. The similarities between PMIs and PKIs are highlighted. The paper also describes how attribute certificates can be used to implement the three well known access control schemes: DAC, MAC and RBAC. Finally the paper gives an overview of how a privilege verifier might operate, and the various types of information that need to be provided to it
GPC6 is a putative target of miR-509-3p and overexpression of miR-509-3p downregulates GPC6 mRNA levels.
No full text(A) Predicted binding sites of miR-509-3p on the 3’-UTR of human GPC6 gene (NM005708). (B-C) A375 cells were transfected with 4nM negative control mimic (mimic ctrl) or miR-509-3p mimic for 48 hours. RNA was collected and RNA levels of miR-509-3p (B) and GPC6 (C) were measured using Taqman assays relative to Rplp0 from n = 3 experiments. Means ± S.D. **, p < 0.001; ***, p < 0.0001 for miR-509-3p mimic versus mimic control.</p
RBAC Policies in XML for X.509 Based Privilege Management
No full textThis paper describes a role based access control policy template for use by privilege management infrastructures where the roles are stored as X.509 Attribute Certificates in an LDAP directory. There is a brief description of the X.509 privilege management model, and how it can be used to implement RBAC. Policies that conform to the template are written in XML, and the template is specified as a DTD. (A future version will specify it as an XML schema). The policy is designed to be used by the PERMIS API, a Java specification for an Access Control Decision Function based on the ISO 10181 Access Control Framework and the Open Group’s AZN API
Implementing Role Based Access Controls using X.509 Privilege Management - the PERMIS Authorisation Infrastructure
No full textThis paper describes the PERMIS role based access control infrastructure that uses X.509 attribute certificates (ACs) to store the users roles. Users roles can be assigned by multiple widely distributed management authorities (called Attribute Authorities in X.509), thereby easing the burden of management. All the ACs can be stored in one or more LDAP directories, thus making them widely available. The PERMIS distribution includes a Privilege Allocator GUI tool, and a bulk loader tool, that allow administrators to construct and sign ACs and store them in an LDAP directory ready for use by the PERMIS decision engine. All access control decisions are driven by an authorization policy, which is itself stored in an X.509 AC, thus guaranteeing its integrity and trustworthiness. Authorization policies are written in XML according to a DTD that has been published at XML.org. A user friendly policy management tool is also being built that will allow non- technical managers to easily specify PERMIS authorisation policies. The access control decision engine is written in Java and has both a Java API and SAML-SOAP interface, allowing it to be called either locally or remotely. The Java API is simple to use, comprising of just 3 methods and a constructor. The SAML-SOAP interface conforms to the OASIS SAMLv1.1 specification, as profiled by a Global Grid Forum draft standard, thus making PERMIS suitable as an authorisation server for Grid applications
The PERMIS X.509 Role Based Privilege Management Infrastructure
No full textThis paper describes the output of the PERMIS project, which has developed a role based access control infrastructure that uses X.509 attribute certificates (ACs) to store the users roles. All access control decisions are driven by an authorization policy, which is itself stored in an X.509 attribute certificate, thus guaranteeing its integrity. All the ACs can be stored in one or more LDAP directories, thus making them widely available. Authorization policies are written in XML according to a DTD that has been published at XML.org. The Access Control Decision Function (ADF) is written in Java and the Java API is simple to use, comprising of just 3 methods and a constructor. There is also a Privilege Allocator, which is a tool that constructs and signs attribute certificates and stores them in an LDAP directory for subsequent use by the ADF
miR-509-1 expression and correlation with GPC6.
No full text(A) Boxplots of miR-509-1 expression levels in TCGA melanoma samples for the four tissue sites. (B) Scatter plot of miR-509-1 and GPC6 expression levels in TCGA melanoma samples (N = 389). The red line indicates the regression line.</p
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