Nt1310 Unit 3 Assignment 1

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\subsection{Security of KEF-MA-CP-ABE-DR Scheme}\label{ch6:sec2:sub4}
We consider potential attackers in the collaborative cloud data sharing system as follows:
\textbf{1)} The CA and each AA are assumed to be honest, such that each of them does not collude with any other entity. However, the CA or any AA can be corrupted by attackers, and also it should be prevented from decrypting any ciphertexts individually. \textbf{2)} The CS is assumed to be minimally trusted. It might attempt to obtain the content of the encrypted data although it correctly performs the tasks assigned by legitimate entities. \textbf{3)} Each DU is assumed to be dishonest and malicious, and he/she might attempt to obtain access to data beyond his/her access privilege. To simplicity, we classify dishonest and malicious DUs in the system into three categories: …show more content…
The ${\cal A}$ makes secret key queries by submitting ${\cal S}_{gid}=\bigcup_{\theta \in {\cal N}-{\cal C}} S_{gid,\theta}$, where ${\cal S}_{gid}\cup \bigcup_{\theta \in {\cal C}} U_{\theta}$ does not satisfy the challenge access structure. The ${\cal B}$ responds to each query by returning a user-central-key $G_{gid}$ along with set of user-attribute-keys $\{AK_{gid,\theta}\}_{\theta\in {\cal N}-{\cal C}}$. \item Key-update-key queries: The ${\cal A}$ makes key-update-key queries by submitting $(x_{\theta}, G_{gid})$ along with a version number $ver_{x_{\theta}}$ for the attribute $x_{\theta}$, where $x_{\theta}$ must be in $S_{gid}=\bigcup_{\theta\in {\cal N}-{\cal C}} S_{gid,\theta}$ and $2\leq ver_{x_{\theta}}\leq ver_{x_{\theta}}^*$. The ${\cal B}$ responds by returning the corresponding key-update-key $uk_{gid, x_{\theta}}^{h(ver_{x_{\theta}})}$ to the ${\cal A}$.

Nt1310 Unit 3 Assignment 1

ManageEngine Desktop Central is prone to a security-bypass vulnerability related to the password-reset feature. An attacker can exploit this to reset the application’s administrator password and gain administrative privileges. On 27 March 2015, a proof of concept (PoC) exploit code was released on multiple websites such as Seclist.org and PacketStormSecurity.com. Open source research did not reveal any instances of this vulnerability in the wild. However, this does not mean that malicious actors…

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Nt1310 Unit 3 Assignment 1

Brainstorming Problem - Charger- Kinetically Powered Charger - already made - need 6 hours of walking for 30 min of charge. (not efficient) ( I would have to create a better version ) Problem - cups don't fit into car cup holders - Adjustable Sized Car Cup Holder - MANY already made Problem - texting and driving - device that won’t start the car unless the phone is plugged in - auto shuts down the phone and charges it. Problem - No home music stand - desktop music stand - already made Problem -…

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Nt1310 Unit 3 Assignment 1

(SOMEONE) and found the following pointers: 1. SOMEONE infrastructure allows users to join any device to their office 365 account without using multifactor confirmation. When this serves as a good time saving feature – in the case of compromised account, attacker would have easy access to register rouge devices. 2. Microsoft Office 365 is having built-in capability to enforce multifactor verification for password reset process. This feature is not utilised. 3. The password configuration…

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Nt1310 Unit 3 Assignment 1

(2019). 3. What is the difference between a'smart' and a'smart'? Additional random value: Add a random value unique to each user that is combined with their password before hashing. This adds an additional layer of security, making it more difficult for attackers…

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Nt1310 Unit 3 Assignment 1

From my reference materials from Cisco and previous work history, I firmly believe that the #1 issue surrounding the deployment of a wireless network is wireless security. Specifically, passive monitoring, unauthorized access, and DoS attacks. Passive Monitoring – wireless networks are intentionally designed to propagate data throughout buildings and areas, almost always resulting in the radio signals traveling beyond the limits of the area. By default, wireless devices are configured for maximum…

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Nt1310 Unit 3 Assignment 1

Youtube was created In 2005 so users could upload, share and view videos. The site quickly gained popularity and was purchased by Google in 2006 for 1.65 billion dollars. As Youtube grew its impact became more significant. The platform allowed anyone to create content no matter your prior popularity. Content creators could find their audience and grow. Some of Youtube's competitors consist of; Vimeo, Daily Motion, and Wistia just to name a few. Youtube obviously isn't the only video sharing site…

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Nt1310 Unit 3 Assignment 1

three layers to be specific: 1. Presentation Tier 2. Business Tier 3. Data Access Tier 1. Presentation Tier: This converts and displays data into a human-readable frame. This tier is for the most part in charge of the UI of the application which manages the perception of data to the user. 2. Business Tier: It is mainly in charge of data trade between the UI and the database of the project. The business logic for the Ticket Purchase system would be available here. 3. Data Access Tier: This mainly…

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Nt1310 Unit 3 Assignment 1

DATA NETWORKS ASSIGNMENT 3 ANSWER 1 a) Figure 1 implies that Go Back-N is used because the given figure shows a cumulative acknowledgement which is a property of the Go Back-N protocol. Selective Repeat gives individual acknowledgements as the window shifts. b) Since individual acknowledgements are shown in figure 2, it is Selective Repeat protocol being used in this figure. c) Figure 2 depicts Selective repeat in which the sender window moves forward as it receives acknowledgement for the smallest…

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Nt1310 Unit 3 Assignment 1

3.1. Duration of Study Pending eIRB approval the estimated duration of this study is 2-years, in order to accrue up to 500 participants. This will begin after approval date and continue for two years after that. The expected duration to complete the online survey itself is approximately 30 minutes. This includes the time required for online consent. Once students submit their survey, they will have completed their participation in the study. 3.2 Study Sites Each study participant will complete…

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Nt1310 Unit 3 Assignment 1

1. What is the difference between a. and a. 1. What is the difference between a. and a. Choose a pair of two-digit numbers and find their greatest common divisor. Show the steps to the. For this example: 72 and 84. We'll find their greatest common divisor (GCD) using the Euclidean algorithm, which involves iteratively applying the division algorithm. Step 1: Divide the larger number by the smaller number and find the remainder. 84/72= 1 R 12 Step 2: Replace the larger number with the smaller number…

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