The Multiple signature

Like paper-based signatures, digital signatures intend to respect a number of security assumptions. Methods of digital signature apposed by a single user have been defined and are widely used. But is it sufficient? What if a legal document requires witnesses and notarization, or a contract needs the signatures of several officers?This paper will first show the basics to understand digital signatures and how the a security properties of integrity, authentication, and non-repudiation are respected.

11p dunglh2013 02-04-2014 58 2   Download

Multiple ankyrin repeat motif-containing proteins play an important role in protein–protein interactions. ANKHD1 proteins are known to possess multiple ankyrin repeat domains and a single KH domain with no known function. Using yeast two-hybrid system analysis, we identified a novel splice variant of ANKHD1. This splice variant of ANKHD1, which we designated as HIV-1 Vpr-binding ankyrin repeat protein (VBARP), does not contain the signature KH domain, and codes for only a single ankyrin repeat motif. ...

12p fptmusic 11-04-2013 45 3   Download

A homologue of interleukin 18 has been identified from rainbow trout,Oncorhynchus mykiss. The trout IL-18gene spans 3.7 kb and consists of six exons and five introns, sharing the same gene organization with its human coun-terpart. The putative translated protein is 199 amino acids in length with no predicted signal peptide. Analysis of the multiple sequence alignment reveals a conserved ICE cut site, resulting in a mature peptide of 162 amino acids. The trout IL-18 shares 41–45% similarity with known IL-18 molecules and contains an IL-1 family signature motif....

11p dell39 03-04-2013 53 3   Download