The Security Blanket, June/July 2002, Vol.1, no.9

Newsletter for Information Technology Department

The Security Blanket, September/October 2002, Issue 11

Newsletter for Information Technology Department

The Security Blanket, August 2002, Issue 10

Newsletter for Information Technology Department

The Security Blanket, January/February 2003, Issue 13

Newsletter for Information Technology Department

The Security Blanket, March/April 2003, Issue 14

Newsletter for Information Technology Department

The Security Blanket, November/December 2002, Issue 12

Newsletter for Information Technology Department

A-1A Supplemental Security Income Program, February 2005

Supplemental security income program

A-1A Supplemental Security Income Program, December 2004

SUPPLEMENTAL SECURITY INCOME PROGRAM

A-1A Supplemental Security Income Program, January 2005

A-1A Supplemental Security Income Program, January 2005

A-1A Supplemental Security Income Program, March 2005

A-1A SUPPLEMENTAL SECURITY INCOME PROGRAM

Stable complexes involving acetylcholinesterase and amyloid-ß-peptide change the biochemical properties of the enzyme and increase the neurotoxicity of Alzheimer's fibrils

Brain acetylcholinesterase (AChE) forms stable complexes with amyloid-beta peptide (Abeta) during its assembly into filaments, in agreement with its colocalization with the Abeta deposits of Alzheimer's brain. The association of the enzyme with nascent Abeta aggregates occurs as early as after 30 min of incubation. Analysis of the catalytic activity of the AChE incorporated into these complexes shows an anomalous behavior reminiscent of the AChE associated with senile plaques, which includes a resistance to low pH, high substrate concentrations, and lower sensitivity to AChE inhibitors. Furthermore, the toxicity of the AChE-amyloid complexes is higher than that of the Abeta aggregates alone. Thus, in addition to its possible role as a heterogeneous nucleator during amyloid formation, AChE, by forming such stable complexes, may increase the neurotoxicity of Abeta fibrils and thus may determine the selective neuronal loss observed in Alzheimer's brain.

A-1A Supplemental Security Income Program, April 2005

SUPPLEMENTAL SECURITY INCOME PROGRAM

A-1A Supplemental Security Income Program, July 2005

A-1A Supplemental Security Income Program, July 2005

On the computational security of a distributed key distribution scheme

In a distributed key distribution scheme, a set of servers helps a set of users in a group to securely obtain a common key. Security means that an adversary who corrupts some servers and some users has no information about the key of a noncorrupted group. In this work, we formalize the security analysis of one such scheme which was not considered in the original proposal. We prove the scheme is secure in the random oracle model, assuming that the Decisional Diffie-Hellman (DDH) problem is hard to solve. We also detail a possible modification of that scheme and the one in which allows us to prove the security of the schemes without assuming that a specific hash function behaves as a random oracle. As usual, this improvement in the security of the schemes is at the cost of an efficiency loss.

A-1A Supplemental Security Income Program, August 2005

SUPPLEMENTAL SECURITY INCOME PROGRAM, August 2005