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Questions tagged [dsa]

DSA (Digital Signature Algorithm) is a public-key signature algorithm defined by NIST. Do NOT use this tag for general "Data Structures and Algorithms" questions.

DSA (short for Digital Signature Algorithm) is a specific public-key cryptography algorithm to sign messages. It is specified by FIPS 186-3 published by NIST.

DSA is normally used to sign a digest, or in recent versions a digest.

Do NOT use this tag for general "Data Structures and Algorithms" questions!

195 questions
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calculate time/space complexity while running program

I am trying different types of sorting algorithms and I understand the concept of asymptotic time and space complexity. I am wondering whether we can write some logic in the program itself to calculate the space/time complexity of that algorithm so…
Onki
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How to read DER DSA private key to AsymmetricKeyParameter in bouncy castle (Java)

How to read DER file with private DSA key (4096 bit) into AsymmetricKeyParameter for usage in DSASigner ? The following code I tried: byte[] privateKeyBytes = FileUtils.readFileToByteArray(new File( "sign-key-private.der")); …
kulatamicuda
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Verifying Signtatures, verifying returns false

I've searched forums and answers but I can't figure out my problem, I am trying to verify a signature , but it always returns false, am I doing something wrong? I generate the key, sign it and then verify it (the byte arrays are not null) public…
Student
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how to convert DSA private key to byte[] ?

Is there any way to convert DSA private key as string or byte[] in java?
user123
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Passwordless SSH connection between linuxserver asks for password

I am trying to create a passwordless connect (with keys) between two linux boxes. I have done it 20 or 30 times before but this is the first time it is fighting me and trying it on a fresh install of Centos 7. I create the key, ssh-copy-id it over,…
user3861816
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Time to verify a signature on a long message

I'm studying the speed (time to verify) a signed message with RSA or DSA over different processors In this link, there are benchmarks for the time to verify a signature on a short message (59 bytes) http://bench.cr.yp.to/results-sign.html But I need…
ahammadz
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Self signed key certificate

I'm trying to figure out how to create an X.509 certificate containing a self-signed DSA public key (SSK) in C#. Having given up on the native C# crypto library which doesn't seem to allow this, I've been looking at the Bouncy Castle…
CompanyDroneFromSector7G
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How to read a DICOM file of Dynamic DSA image

I have a Dynamic DSA image of DICOM format, it consists of a header of patient information etc and a series of X-ray image data to show the bone motion in only one file. Is there any method in librarys like VTK, ITK or GDCM can read this data out?
Cheery
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Retrieve DSA key passphrase

I use dsa key with passphrase to login via ssh into CentOS 6 remote server. Unfortunately I forgot the passphrase. Is there a way to reset or retrieve passsphrase? I still do have access to root of remote server through webmin.
Chirag
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Are .Net's and Java's DSA implementation compatible?

I am trying to digitally sign requests made by a mobile client running J2ME and want to verify the signature by the .Net Framework. Does anyone know if the implementations DSACryptoServiceProvider //.Net and Signature.getInstance("SHA1withDSA",…
Manu
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C cast fails: cannot cast from void* to a C struct

Code : #include #include #include typedef struct singlylist *nodeptr; typedef struct singlylist *position; struct singlylist { int x; position next; } . typedef struct singlylist List; List L; int isempty(List…
Mohammad Hasan
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Digital sign on data

I am trying to sign and verify text using DSA. I have written sample code to sign. But it doesn't work. Can you give a hand with this? This is a only a test because the idea is to sign data, record in a tag an when I read the tag I want to verify…
mike
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DSACryptoServiceProvider.ImportParameters 'Bad Data'

I'm testing the DSACryptoServiceProvider using the parameters given in FIPS PUB 186. When I attempt to import the public key parameters, I receive a 'Bad Data' error: Dim pString As String =…
ic3b3rg
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Openssl Generate Public Asymmetric Key

I am trying to output the public EC key parameters Qx and Qy from OpenSSL CLI. Is this possible?
feederic
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DSA and Public Key Exchange

I am trying to implement a licensing solution with DSA Algorithms for my application. Now here is what I have done: Generated a hardware key, taken its hash. Generated public and private keys. And encrypted my hash function with private key. I…
user1343318
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