how to demonstrate that a protocol is certain with those specifications.

Posted by kawtousse on Stack Overflow See other posts from Stack Overflow or by kawtousse
Published on 2010-06-13T10:41:00Z Indexed on 2010/06/13 13:12 UTC
Read the original article Hit count: 286

Filed under:

homework

|

protocols

Hi every one,

we have 4 persons A, B, C and D witch want to know the averge of their salary SA SB SC SD but no one wants that the others know his salary. For that they use this protocol:

A->B: [N+SA ]KB
B->C:[N+SA+SB]KC
C->D:[N+SA+SB+SC]KD
D->A:[N+SA+SB+SC+SD]KA

where the notation [m]KY represents the message x crypted xith the public key of y

Is this protocol certain. can we trust it. want you please give me justification.

thanks for help.

© Stack Overflow or respective owner

Related posts about homework

parsing a list and producing a structure of that

as seen on Stack Overflow - Search for 'Stack Overflow'
;; structure representing homework points ;; nr: number - the number of the homework ;; points: number - the number of points reached (define-struct homework (nr points)) ;; parse-homework: (list of number pairs) -> (list of homework) ;; The procedure takes a list of number pairs and produces… >>> More
Scheme homework help

as seen on Stack Overflow - Search for 'Stack Overflow'
Okay so I have started a new language in class. We are learning Scheme and i'm not sure on how to do it. When I say learning a new language, I mean thrown a homework and told to figure it out. A couple of them have got me stumped. My first problem is: Write a Scheme function that returns true (the… >>> More
Unix [Homework]: Get a list of /home/user/ directories in /etc/passwd

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm very new to Unix, and currently taking a class learning the basics of the system and its commands. I'm looking for a single command line to list off all of the user home directories in alphabetical order from the /etc/passwd directory. This applies only to the home directories, and not the contents… >>> More
sequential search homework question

as seen on Stack Overflow - Search for 'Stack Overflow'
Consider a disk file containing 100 records a. How many comparisons would be required on the average to find a record using sequential search, if the record is known to be in the file? I figured out that this is 100/2 = 50. b. If the record has a 68% probability of being in the file, how many comparisons… >>> More
[Homework] Online programming editor

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For a school project i need to write or use a online programming editor. It is a part of a bigger project. I thought of a java application, php/html/javascript or flash. I have a couple of things i could do: Find a good working application and edit it so it works with the rest of the project Find… >>> More

Related posts about protocols

binary protocols v. text protocols

as seen on Stack Overflow - Search for 'Stack Overflow'
does anyone have a good definition for what a binary protocol is? and what is a text protocol actually? how do these compare to each other in terms of bits sent on the wire? here's what wikipedia says about binary protocols: A binary protocol is a protocol which is intended or expected to be read… >>> More
Objective-C Protocols within Protocols

as seen on Stack Overflow - Search for 'Stack Overflow'
I recently began trying my hand at using protocols in my Objective-C development as an (obvious) means of delegating tasks more appropriately among my classes. I completely understand the basic notion of protocols and how they work. However, I came across a roadblock when trying to create a custom… >>> More
Difference between message-oriented protocols and stream-oriented protocols

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to understand the difference between these two computer networking terminologies. I searched over the internet but coudn't get a good idea. Could anybody please explain me or give a link to a page that explains this? Thank you... >>> More
Clojure Protocols vs Scala Structural Types

as seen on Stack Overflow - Search for 'Stack Overflow'
After watching the interview with Rich Hickey on Protocols in Clojure 1.2, and knowing very little about Clojure, I have some questions on Clojure Protocols: Are they intended to do the same thing as Structural Types in Scala? What benefits do Protocols have over Structural Types (performance,… >>> More
Code Igniter email protocols and rendering HTML emails?

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a website built in code igniter that emails users. I use CI's email class from the controller to do mail out, but I discovered that if I use the "mail" protocol, some (not all) users see un-rendered html emails with the html mark up viewable, while others do not. But if I use the "sendmail"… >>> More