Recent questions tagged cryptography

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cryptography - Can One Public Key be Used to Encrypt and Decrypt Data during the SSL Handshake?

When a server sends a Certificate message to a client, the public key in the server's certificate will be ... information. Is it right? 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 - Java: How to create SHA-1 for a file?

What is the best way to create a SHA-1 for a very large file in pure Java6? How to implement this ... String createSha1(java.io.File file); 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 - Reliable implementation of PBKDF2-HMAC-SHA256 for JAVA

UPDATED 2019: Bouncycastle now support PBKDF2-HMAC-SHA256 since bouncycastle 1.60 Is there any reliable ... .org/specifications.html 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 - C_GetSlotList Failing when called from IIS but not from IIS express

So I have this c# webservice that eventuallly calls C_GetSlotList() method from the German Elster toolkit (Eric) ... ) = end critical section 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 - C# PasswordDeriveBytes Confusion

I have following code in C# PasswordDeriveBytes DerivedPassword = new PasswordDeriveBytes(Password, SaltValueBytes, ... GetBytes method? 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 - ECDSA signatures between Node.js and WebCrypto appear to be incompatible?

I'm using the following example for signing + verifying in Node.js: https://github.com/nodejs/node-v0.x- ... and WebCrypto signature is not. 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 - RSA Encryption-Decryption in iphone

I am developing Iphone application. I have used SecKeyGeneratePair method of Security/Security.h framework. I am ... is a struct __SecKey. 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 - Generating X509 Certificate using Bouncy Castle Java

I am looking for an example or tutorial to generate X509 Certificates using BC in Java. A lot of example are ... and private keys to files] 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 - Signing data with private key in c#

I need to sign some data with one private key using Algorithm SHA1RSA ,Rsa Key length 2048 with 64 base encoding. ... i refer that to the code? 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 cryptographically hash a JSON object?

The following question is more complex than it may first seem. Assume that I've got an arbitrary JSON object, ... any approaches or thoughts =) 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 get truly random data, not random data fed into a PRNG seed like CSRNG's do?

From what I understand, a CSRNG like RNGCryptoServiceProvider still passes the truly random user data like mouse movement, ... a one time pad.) 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 - Slow AES GCM encryption and decryption with Java 8u20

I am trying to encrypt and decrypt data using AES/GCM/NoPadding. I installed the JCE Unlimited Strength Policy ... at 3 megabytes per second. 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 - Password Verification with PBKDF2 in Java

I'm doing password based file encryption in Java; I'm using AES as the underlying encryption algorithm and ... ? Thanks for your time. 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 - Should I use an initialization vector (IV) along with my encryption?

Is it recommended that I use an initialization vector to encrypt/decrypt my data? Will it make things more ... generally recommended and why? 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 you verify an RSA SHA1 signature in Python?

I've got a string, a signature, and a public key, and I want to verify the signature on the string. The ... any terminology, please let me know. 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 - Generate SHA hash in C++ using OpenSSL library

How can I generate SHA1 or SHA2 hashes using the OpenSSL libarary? I searched google and could not find any function or example code. 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 - Is calculating an MD5 hash less CPU intensive than SHA family functions?

Is calculating an MD5 hash less CPU intensive than SHA-1 or SHA-2 on "standard" laptop x86 hardware? I'm ... matters, let's assume its 300K. 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 - Can two different strings generate the same MD5 hash code?

For each of our binary assets we generate a MD5 hash. This is used to check whether a certain binary asset ... generate the same MD5 hash? 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 long to brute force a salted SHA-512 hash? (salt provided)

Here is an algorithm in Java: public String getHash(String password, String salt) throws Exception { String input ... is not a dictionary word. 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 use RSA to encrypt files (huge data) in C#

I'm new to encryption. I need to implement asymmetric encryption algorithm, which i think it uses private/public ... to encrypt files using RSA? See Question&Answers more detail:os...

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

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