Recent questions tagged cryptography

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cryptography - Decrypting encrypted assertion using SAML 2.0 in java using OpenSAML

I have a problem while trying to decrypt encrypted assertion using SAML 2.0. The library I am using is ... java cryptography library. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Private key generated by openssl does not satisfy n = p * q

I've generated a key with openssl by using the following command openssl genrsa 1024 I've got the following result - ... RSA PRIVATE KEY----- See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - How to load an RSA key from a PEM file and use it in python-crypto

I have not found a way to load an RSA private key from a PEM file to use it in python-crypto ( ... use with Crypto.PublicKey.construct(). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - HMAC SHA256 in Swift 4

I have a string and a key, which i want to generate an HMAC SHA256 from it. Although i'm using 2 libs ... like the sources of truth.Any idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Is there a standardized fixed-length encoding for EC public keys?

I was wondering if there was (and I hope there is) a standard for public key size for ECDH (Elliptic Curve Diffie- ... 224, 256, 384 and 521). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - How to encrypt plaintext with AES-256 CBC in PHP using OpenSSL?

I am trying to encrypt sensitive user data like personal messages in my php powered website before entering ... help is heavily appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Does OpenSSL -sign for ECDSA apply ASN1 encoding to the hash before signing?

This SO question ECDSA sign using OpenSSL without ASN1 encoding the hash states the OpenSSL perfoms ASN1 ... the OpenSSL documentation. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Simple caesar cipher in java

Hey I'm making a simple caesar cipher in Java using the formula [x-> (x+shift-1) mod 127 + 1] I ... applying in the encrypted text. Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - XML to PEM in Node.js

I'm stuck with the crypto api because I know little about cryptography. I have this XML: <RSAKeyValue> <Modulus> ... m using node v0.10.18) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - RNGCryptoServiceProvider in .Net Core

I cannot find the System.Security.Cryptography.RNGCryptoServiceProvider class in .NetCore. It is essential to ... achieving this functionality? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - SHA1 hashing in Delphi XE

I'm in the process of implementing XML digital signatures. I'm starting with little steps, so right now I want ... help, it is most appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Crypto library suitable for Objective-C

I'm looking for a crypto library to use with Objective-C code. There is a C++ library which is too ... Your help will be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Converting A public key in SubjectPublicKeyInfo format to RSAPublicKey format java

The PublicKey.getEncoded(), returns a byte array containing the public key in SubjectPublicKeyInfo (x.509) format, ... RSA public key encoding? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Why should we set a timestamp when we do a codesigning?

If I set a timestamp with signing, what happens? What if I don't set? Is it essential? Why is it recommended? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - PBKDF2-HMAC-SHA2 test vectors

There are test vectors for PBKDF2-HMAC-SHA1 in RFC6070. There are test vectors for HMAC-SHA2 in RFC4231. But ... them, or contribute their own. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Generating random IV for AES in Java

I'm implementing and AES encryption engine for PBE in android, and I've found two ways to implement the ... = new IvParameterSpec(iv2); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Rijndael support in Java

We have a requirement to do some Rijndael development in Java. Any recommendations for articles, libraries etc. ... of data using Rijndael. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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372 views

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cryptography - Examples of Hash-Collisions?

For demonstration-purposes, what are a couple examples of strings that collide when hashed? MD5 is a relatively ... this will be sufficient. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Is it possible to encrypt with private key using .net RSACryptoServiceProvider?

I know that RSACryptoServiceProvider can encrypt with the public key, then it can be decrypted with the ... using the RSACryptoServiceProvider ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - AES encryption how to transport IV

I understand that unique IV is important in encrypting to prevent attacks like frequency analysis. The question: For ... am I missing something? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - C# How can I validate a Root-CA-Cert certificate (x509) chain?

Let's say I have three certificates (in Base64 format) Root | --- CA | --- Cert (client/signing/whatever) How ... . This is exactly what I want. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - BouncyCastle RSAPrivateKey to .NET RSAPrivateKey

I'm creating a certificate distribution system to keep track of clients and stuff. What happens is ... RSAParameters parameters) InnerException: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - verifying a file signature with openssl dgst

I am signing packets in some Java code and I want to verify the signatures on a C server. I want to fork openssl for ... 8f:3e:3f:5d:b3:f8:dd:5e See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Digital signature for a file using openssl

Is there a way to digitally sign a x509 certificate or any document using openssl? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - How to predict the next GUID from a given GUID?

I have sent 10000 mails to our customers and each mail had a link of the format http://example.com/LogIn?key ... so the links would work again. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Has anyone got any code to call SignerSignEx from C#?

Would really appreciate something that does the .Net equivalent of the SignerSignEx example here: http://blogs.msdn.com/b ... true Thanks!!!!!!! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - Which attacks are possible concerning my security layer concept?

Despite all the advices to use SSL/https/etc. I decided to implement my own security layer on top of ... provide enough... security? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - How do I obtain the public key from an ECDSA private key in OpenSSL?

I am providing this sample application to show my problem #include <stdio.h> #include <stdlib.h> #include <openssl/ ... figure out why it fails. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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