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0 answers

System for self-evaluation and practice of mathematics

I'm looking for a package to implement a small online learning environment, but I don't really know where to look. Let me describe what I have in mind, I'm sure lot's of you will immediately see which …

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Privacy-Preserving relational databases: checking the existence of a record (or multiple records)

I would like to know if there exists a protocol which performs the following operation in a privacy-preserving fashion: User $U$ wants to know whether a record is stored in the database. The primary …

1 answer

How can I hyperlink one comment from another comment location in javadoc

I want to write a hyperlink/link for a block of comment which I can refer from any part of code. For example I have mentioned some comments on top of class: /** * Really long comments with some …

1 answer

How can I retrieve images from MYSQL- Encrypted characters error

i'm working with uploading and retrieving images from database using php and mysql.I have tried the following codes below but it returns lot of encrypted characters. The data type of the image in ...

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Unable to install MikTeX

Can someone suggest a solution? I attach the log MiKTeX Setup 2.9.4503 Report Date: Tuesday, September 02, 2014 Time: 07:58:43 OS version: Microsoft Windows 7 Home Basic Edition, 64-bit Service ...

asked 4 hours ago by Karan on Super User superuser.com
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How can the RNGCryptoServiceProvider be used to generate Bridge hands?

The game of Bridge is played with 52 different playing cards that are randomly distributed among four players, each player ending up with thirteen cards: a so called "deal". Roughly a little less than …

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Counting graph isomorphisms and entropy

Question: If all graphs on $n$ vertices are given equal probability, what does the induced probability distribution on the graph isomorphism classes look like? Are there any patterns that emerge as …

1 answer

Is SHA related to AES or TLS in any way

I have been reading about SHA-2 family and I found a lot of in depth details, but I am confused about how it is related to TLS and AES. TLS encrypts data between server and client, but does it make …

1 answers | asked 5 hours ago by user3592502 on Cryptography crypto.stackexchange.com
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try with resources introduce unreachable bytecode

Is it possible that javac generates unreachable bytecode for the following procedure? public void ex06(String name) throws Exception { File config = new File(name); try (FileOutputStream fos …

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Decryption of base64 encoded data objective-C

I have been working on this for a while, but can not find a way to tackle the problem. Hopefully one of you can tell me what I am missing. I am using NSURLConnection to download base64 encoded data …

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Encrypt/Decrypt web.config

I need to Encrypt the web.config file after publish it to the web server. The problem is, if I use asp_reg, I won't be read by the other machine/server. Does anyone have an idea how to do this? Some …

1 answers | asked 8 hours ago by Haminteu on Stack Overflow stackoverflow.com
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Double multi-encryption?

Just noticed we’ve got two alike tags: multiple-encryption Multiple encryption means encrypting a message two or more times using either the same, or a different algorithm. double-encryption Double …

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How is the following different than RSA Signing of a document?

If the goal is to demonstrate that you are who you say you are, I think the following will work: Bob wants to know that you are Amy. Bob encrypts a number using Amy's private key and then asks her ...

2 answers | asked 9 hours ago by Jeff on Cryptography crypto.stackexchange.com
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Is multiple encryption using NaCL and TLS better?

In general, the idea of multiple encryption sounds interesting - for creating stronger cyphers (especially against implementation bugs), one could always get the configuration details wrong and mess …

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Doesn't knitr plot have axes?

In the following MWE, my plots have no axes at all when compiled in RStudio. However, when I do knit2pdf("myfile.Rnw") and compile the resulting .tex document, everything works fine. Why? ...

1 answers | asked 10 hours ago by Heisenberg on Stack Overflow stackoverflow.com
1 answer

How do I encrypt and store private messages?

I am developing a private messaging system for my website using Laravel 4, and I want to ensure that the messages remain private. So far, I have the following code written: class PkeyEncryption { …

2 answers

Is this a typo in the java tutorials?

I was going through the Java TCP Client Server tutorials where they are explaining how a echo server works and how a TCP client interacts with the echo server. For the TCP Client, they have given ...

2 answers | asked 13 hours ago by Krimson on Stack Overflow stackoverflow.com
1 answer

Prevent MITM attack while encrypting data by using ElGamal ECC?

I am using ElGamal ECC to encrypt my plain text data. I want to ensure that my data is safe from a Man-In-The-Middle attack. What methodology I can adopt to achieve this goal? How can we prevent a …

1 answer

Marginsize in Latex resume displays dimensions

I'm using Latex to write my resume, however the default margins for the resume doc type are too wide. The best way to correct this is using the anysize package then setting the margin size, however …

1 answers | asked 16 hours ago by aa260022 on Stack Overflow stackoverflow.com
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System for self-evaluation and practice of mathematics

I'm looking for a package to implement a small online learning environment, but I don't really know where to look. Let me describe what I have in mind, I'm sure lot's of you will immediately see which …

0 answers

Doxygen dot. Draw link between classes by annotation

Doxygen can generate class diagrams with graphiz. For example: class A {...}; class B extends A {...}; From this code I can generate a picture where doxygen can show that one class it the parent …

1 answer

CBC-MAC based on PRF

Why is the block cipher in the CBC-MAC taken to be a pseudo random permutation (PRP) and not a pseudo random function (PRF)? We don't need the bijective property of the PRP. So why go with it?

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rst2html : unknown latex command

I use rst to quickly write some personal notes. I would like to add some equations in my notes. But some of the command I use are defined in special packages or personal files, therefore when I run …

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Why do these images have the same entropy?

Why do these two images have the same entropy? These images are created in MATLAB as follows: N = 50; Z1 = randi([0 1],N); Z2 = zeros(N); Z2(1:2:N,1:2:N) = 1; Z2(2:2:N,2:2:N) = 1; subplot(1,2,1) ...

1 answers | asked 18 hours ago by Filippo Pannavich on Stack Overflow stackoverflow.com
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Jdbc Paradox Encrypted files

I need to access some paradox files from JDBC. Since the most complete library is not free I manage to read the files using a Odbc-Jdbc bridge see: I create a datasource in windows using the paradox …

1 answer

SQL Server - Password Field Encoding

First Question : Which One is better to encode password ? SHA1 HashBytes('SHA1','MySecret Phrase') Encrypt EncryptByPassPhrase('secretKey', '123456789') Is there any better way that is more …

1 answer

Real-world applications of Differential Privacy?

Differentially private techniques guarantee privacy while often permitting accurate answers ...this is something I have been reading up on lately as a means of preserving user ...

1 answers | asked 19 hours ago by robocode on Information Security security.stackexchange.com
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Real-world applications of Differential Privacy?

Differentially private techniques guarantee privacy while often permitting accurate answers ...this is something I have been reading up on lately as a means of preserving user ...

2 answers

Copying bytes from FileInputStream to CipherOutputStream (or vice versa) extremely slow

I have been following the tutorial "How do I encrypt and decrypt files using DES?" to add a simple file encryption to an existing Android 4+ app. Everything works fine, except that the encryption …

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Program never ends when use other implementation of Execution Context for Futures

import java.util.concurrent.Executors import scala.concurrent._ import scala.util.{Failure, Success} import scala.concurrent.duration.DurationInt import scala.language.postfixOps object Test extends …

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