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Use case of RSA CRT

I discovered the CRT version of RSA cryptosystem which is used in many crypto libraries (openSSL, Java...). The use of the Chinese Remainder Theorem improves the speed of decryption so why it's not ...

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Efficiently show/prove knowledge of third party secret without leaking information

Say Alice publishes (i.e. all parties in the universe) a key or certificate $x$ and sends a secret $s$ to Bob. Bob then publishes some data $d$ (his identity or a message or smt.) and an ...

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Is JME still alive

I learnt JME a long time ago and now i'm working on Android and I want to know where is Java Micro Edition. I tried on google but all links are old. Could someone have some links or documentation to ...

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JAVA a reliable equivalent for php's MCRYPT_RIJNDAEL_256

I need to access some data that used PHP encryption. The PHP encryption is like this. base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($cipher), $text, MCRYPT_MODE_ECB)); As value of $text they ...

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Android AES encryption / decryption ignores password

I want to make a simple app to encrypt / decrypt messages with AES. My code seems to work right now, as i get text encrypted and decrypted with no problems. I have an input field, a field to enter ...

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How secure is a lagged fibonacci sequence for encrypting brief messages?

Say I start with a 26-letter keyword and convert the letters into 26 integers (A=0, B=1...Z=25) nr[0] to nr[25]. Then I create a stream, nr[26] onwards, with a lagged fibonacci sequence where nr[n]= ...

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How to split and join message for crypto?

The encrypt and decrypt althorithm often come with a "base-number" value, such as Caesar (N = 26), Elgamal(N is prime). And if a message value is greater than N, we must split it. A simple example: ...

2 answers | 56 mins ago by user2447581 on Stack Overflow stackoverflow.com
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How to use id_rsa.pub file with JSch

I am facing problem to connect a remote SFTP server using JSch(). I don't have any access or information about the remote server to connect except a id_rsa.pub file and the hostname and the ...

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New to Cryptography

A friend of mind asked me if I could take a crack at this here: PRSAO EGERA UIADM WEHDN ISNRA SAWUA AESSR EFGDO SOGVO RBEEE AARTE SCTDF MENUI BRTTL MEYTU MTMEU AIKWH UTKWE RWAHM NPWRA EESON ONESE ...

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What do you call one time pad where pseudo-random numbers are used?

What is the encryption method called when pseudo-random numbers are used instead of true random numbers?

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Mock Unit Test for a REST API callout

After attending DF14 I have a fairly solid understanding of the HttpCalloutMock() when unit testing for REST callouts, but I'm having trouble implementing it for the first time. The documentation I've ...

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How Secure is a Pronounceable Password? In means of entropy

There are some strong studies which support the use of pronounceable passwords and multiple tools which provide generation of such passwords. According to this question the entropy of a password ...

1 answers | 3 hours ago by Habib on Cryptography crypto.stackexchange.com
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Feature Selection by Entropy and Information Gain in Matlab

I have a dataset contains numeric and nonnumeric values so I divided them into tables where tNonNumeric indicates table contains nonnumeric values. My dependent variable is 'churn' feature in which 0 ...

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Font smoothing for pdf files in OSX Yosemite Safari vs Skim

I produce a lot of pdf files using LaTeX and thus, I also read a lot of such files. After the update to OS X 10.10 the fonts are not smooth anymore. However, Safari seems to handle it much better than ...

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Special Characters in Markdown - Pandoc and Github Flavored

I'm trying to use "greater than or equal to" and "less than or equal to" symbols in a document that I'm producing in Markdown. I'm striving to have this document render correctly to a PDF via Pandoc ...

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How to select network interface when connecting to SFTP with JSch

I am facing problem to create a session to a remote SFTP server by JSch: The command i use to connect the sftp server through shell is: sftp -o BindAddress=SOME_IP_ADDRRESS myUserName@HOST_IP_ADDR ...

2 answers | 5 hours ago by Arpan Das on Stack Overflow stackoverflow.com
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How to deal with CurpsorAdapter in connection with SQLCipher

I'm trying to set up an encypted sqlite3 database in Adroid. I tried the 6 steps CommonsWare suggested in encrypt sqlite database Android:. Most of it worked fine. The problem was that there seems ...

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M2Crypto Diffie-Hellman parameters as .pem

What is the M2Crypto equivalent of this openssl cli command? openssl dhparam -out dh.pem 2048 My attempt Looking through the test cases I can generate diffie-hellman parameters as such: ...

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AES-GCM Disadvantage

What is the disadvantage of AES-GCM mode for authenticated encryption? Why does the CAESAR competition say that it’s one of the goals to find an AE scheme that offers an advantage over AES-GCM? What ...

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Is there any probabilistic version of RSA?

I have now studying the RSA, but I think that is it possible to have some probabilistic version like a random bit string "r" XORed with the key? Is there any probabilistic version of RSA? Thak you ...

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JavaDoc from External Library (.AAR)

I'm using Android Studio 0.8.13 on Windows 7. I had created an external library (.AAR file) form project that i want to reuse. All classes and methods wrote with javadoc description. The problem is ...

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Small Prime Difference in RSA

In RSA, the $p$ and $q$ should be randomly generated, and they are the same size. The difference between $p$ and $q$ should not be small. Suppose that $u=|p-q|<20$ and $p \times q ...

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Give you or Give it to you

I will give you I will give it to you Which one is correct?

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Substitution cipher decryption using letter frequency analysis for text without blanks and special characters

I need to find the plain text for given cipher text. I also have statistics (in an Excel document) for the letters in the given language e.g. I have the frequencies of the letters and also of the ...

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Large file validation on an embedded system through hash and encryption

As a preface, I have to say that I am a noob in this area. Having said that, I will ask the question. I have a situation where I need to validate and protect against tampering a handful of large ...

2 answers | 12 hours ago by McMurrich on Cryptography crypto.stackexchange.com
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keyset does not exist in accessing a x509certificate2 in c#

when I try to use the x509Certificate2 object for the first time after installing it thorugh its pfx then it can sign the data, but from the very second time it can't and show an error that keyset ...

2 answers | 12 hours ago by habibalsaki on Stack Overflow stackoverflow.com
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Is there a good list of all the parts of the Security Chain?

I was thinking there must be a concise description, at a high level, of all necessary & sufficient conditions. Like: Strong Crypto, Key Management, Key Cycling, Physical Access, ...

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LaTex: Is it possible to vertically center multiple columns in a table?

I've found an example here but that only centers one column and I can't really adapt it to my needs. What I'd like is something like this:

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How to transfer encrypted data over AirDrop

I want to transfer my NSObject "RND_PatientData" which is encrypted from my application to another person using the application using AirDrop. At present my data is saved using this code: - ...

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Is (WEP) shared key authentication secure?

I've been reading up on wireless authentication and shared key authentication sounds completely bonkers. I know WEP is very insecure and breaking it with aircrack-ng takes 5-15 minutes but this sounds ...

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