Skip to main content

panda abstract

ABSTRACT

                With data storage and sharing services in the cloud, users can easily modify and share data as a group. To ensure share data integrity can be verified publicly, users in the group need to compute signatures on all the blocks in shared data. Different blocks in shared data are generally signed by different users due to data modifications performed by different users. For security reasons, once a user is revoked from the group, the blocks which were previously signed by this revoked user must be re-signed by an existing user. The straightforward method, which allows an existing user to download the corresponding part of shared data and re-sign it during user revocation, is inefficient due to the large size of shared data in the cloud. In this paper, we propose a novel public auditing mechanism
For the integrity of shared data with efficient user revocation in mind. By utilizing the idea of proxy re-signatures, we allow the cloud tore-sign blocks on behalf of existing users during user revocation, so that existing users do not need to download and re-sign blocks by themselves. In addition, a public verifier is always able to audit the integrity of shared data without retrieving the entire data from the

Cloud, even if some part of shared data has been re-signed by the cloud. Moreover, our mechanism is able to support batch auditing by verifying multiple auditing tasks simultaneously. Experimental results show that our mechanism can significantly improve the efficiency of user revocation.

Comments

Popular posts from this blog

Jio

Reliance Jio planning its own  cryptocurrency called JioCoin  elder son Akash Ambani leading the JioCoin project, Reliance Jio plans to build a 50-member team of young professionals to work on blockchain technology, which can also be used to develop applications such as smart contracts and supply chain management logistics

garbage monitoring using arduino code with gsm

#include <SoftwareSerial.h> #include <LiquidCrystal.h> //LiquidCrystal lcd(7, 6, 5, 4, 3, 2); LiquidCrystal lcd(13, 12, 11, 10, 9, 8); SoftwareSerial mySerial(0,1); #define trigPin 2 #define echoPin 3 #define PIR_sensor 4 #define m11 5 #define m12 6 void setup() {    lcd.begin(16, 2);    lcd.print("    Garbage    ");    Serial.println("garbage ");   lcd.setCursor(0,1);   lcd.print("   Open Close    ");   Serial.println(" open close");   delay(3000);   lcd.clear();   //lcd.print(" ");   delay(2000); mySerial.begin(9600); // Setting the baud rate of GSM Module Serial.begin (9600); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT);  pinMode(m11, OUTPUT);   pinMode(m12, OUTPUT);   } void loop() {  readPIR();  pingDist();  SendMessage(); } void pingDist ()   {     long duration, distance;...