I am trying to use a SecureRandom to generate random numbers in my java project. But I am a little confused as how to keep my object for SecureRandom. Should it be a static class member. I dont intend to call this from outside. Below is my current implementation : Is this the correct way to use SecureRandom in java
Tag: cryptography
Is SecureRandom weaken when seed with Random?
Could a seed from java.util.Random for java.security.SecureRandom weaken the cryptographically strong random number generator? I saw this code and wonder why this is done in that specific way. From the documentation, the call of setSeed will never reduce randomness. So why is setSeed called anyway? public void setSeed(long seed) Reseeds this random object, using the eight bytes contained in the
trying to convert Java RSA-PSS signature verification code (with SHA256 hash, SHA1 MGF hash) to Python
Here’s my Java code, which successfully verifies the signature, as expected. Signature sig = Signature.getInstance(“RSASSA-PSS”); PSSParameterSpec pssParams = new PSSParameterSpec( “…
Is there any stable serialization method for different languages?
In my project we have an API, and many clients may send transactions to this API. Transactions should be signed. Clients may be written in any language (C++, C#, python, go, whatever), with any CPU …
Fixed length 64 Bytes EC P-256 Signature with JCE
I need a fixed length 64 Byte ECDSA signature with the NIST P-256 Curve. The implementation hast to use JCE. The following code sample can generate a signature and verify it. Provider provSign = …
For PBKDF2, using HMAC-SHA256 is more secure than using HMAC-SHA-1?
I’m looking for the proper Java algorithm for password encryption, and I found that Java SDK provides PBKDF2WithHmacSHA1, but not PBKDF2WithHmacSHA256. I heard that HMAC-SHA256 will take more time …
Extract raw certificate from PKCS#7 file in JAVA
I would like to achieve the same what this openssl command performs, but programmatically in Java: openssl pkcs7 -in toBeExported.p7c -inform DER -out certificate.pem -print_certs which means that …
Why do people use bouncycastle instead of Java’s built in JCE provider? What is the difference?
Why do people use bouncycastle instead of Java Cryptography Extension? What is the difference? Answer BouncyCastle has many more cipher suites and algorithms than the default JCE provided by Sun. In addition to that, BouncyCastle has lots of utilities for reading arcane formats like PEM and ASN.1 that no sane person would want to rewrite themselves.
Java 256-bit AES Password-Based Encryption
I need to implement 256 bit AES encryption, but all the examples I have found online use a “KeyGenerator” to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key?…