security aspects specific to the Java programming language and libraries.

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1answer
66 views

Private and public key need to have same algorithm?

The private and the public key from the cert must have the same algorithm, correct? EDIT: Yes of course pub / priv are a key pair. So this code would be legal, to be more flexible (e.g. ECDSA or DSA): ...
3
votes
2answers
428 views

Is AES(Rijndael) faster than Blowfish?

I know theoretical that blowfish is much faster than aes. But I benchmarked several algorithms including aes and blowfish for 1MB, 5MB, 10MB etc. files in java 8 platform and bouncy castle library. In ...
16
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7answers
5k views

Any comprehensive solutions for binary code protection and anti-reverse-engineering? [closed]

Does anyone know of good products with comprehensive binary hardening and anti-reverse-engineering features? Or better, has anyone seen an independent review comparing products that perform these ...
3
votes
1answer
858 views

Securing sensitive data in a DB,is using H2 worth it?

I am designing a web application at the moment, and one of the requirements is to secure the user credentials as well as their roles. Now of course, besides the usual password hashing + salt +.... I ...
6
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1answer
16k views

PKCS7 encoding in Java without external libs like BouncyCastle etc

I am working on signing and encoding of CMS/PKCS#7 messages (something similar to C# SignedCms). I have x509certificate from the keystore, rsa private key, ContentInfo. ContentType is "oidPkcs7Data". ...
1
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0answers
427 views

Share and store RSA - public key in java server and vice versa

My requirements are: Requirement 1: Share public key to java server. Steps: Generate public-private keys in iOS app. Store the generated keys in keychain. Send generated public key to java server. ...
1
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2answers
987 views

Java SecureRandom generate secure random number

How to generate a secure random number bit length is 256 bits using Java. What is the different between: SecureRandom random = new SecureRandom(); and SecureRandom prng = ...
1
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1answer
1k views

Is it safe to use localstorage to store session variables and user password? [closed]

I'm trying to make a web application in Java with a login/session system using com.sun.net.httpserver and as far I know, it does not have an inbuilt method to this. So, I had the following idea: 1 - ...
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2answers
2k views

Can you write OS-related virus using high level languages like Python

It is a well known fact that OS-related viruses are commonly written in low level languages like C or C++ which require direct access to the kernel of the CPU , I am just wondering if its possible ...
25
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3answers
2k views

Why did Java (JRE) vulnerabilities peak in 2012-2013?

I've taken a graph of the amount of CVE reports concerning the JRE per Year. Now as you can see this spiked in 2012-2013, which could have been guessed easily, if you look at the amount of news items ...
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2answers
568 views

Doesn't the same string encrypted with the same key generate the same encrypted value?

This is my page and class to encrypt the string entered and saved in database. Each time, the Key__c is the same, as I take it from custom settings. But when I enter abc and save two times, the ...
0
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1answer
365 views

What are the security features of JRE 8?

I was tasked with finding the security features of JRE 1.8 and compare it to JRE 1.7 update 51. When I try to look for new security though, it only shows ">JDK< Security Enhancements" (ie. Not ...
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2answers
97 views

How to avoid log4j output external modification

I had a request to find a solution for making a log file secure from editing from the user (not root user) running the JBoss instance of an application (Linux environment) First idea I had is to use ...
1
vote
1answer
750 views

Convert a DER encoded Certificate to PEM encoded Certificate

I have a p7b certificate(DER encoded) which I need to convert to a PEM encoded certificate so that I can import it into my keystore. I see that the openssl command below does the job of the ...
17
votes
4answers
3k views

How secure is Java's hashCode()?

On our views in a Java web application, currently I am using hashCode as Id's for objects so that at server end I can get the same object back. However, I am wondering how secure Java's hashCode ...
0
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2answers
302 views

Anti Virus Intergration

we have found an issue with some production systems that the Anti-Virus causes the program to become slow a lot of the times and generally interferes with the activity of our software. Now as far as I ...
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2answers
958 views

Client Authentication by certificates in Google APP Engine java

I am writing an application in Google APP Engine java which authenticate the user by its certificate. I have created a self signed certificate using keytool at client side. I also enable the HTTPS ...
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2answers
282 views

Any way to use Java (sun micro) without any concern of infection

My antivirus has kept removing a Java exp virus only for it to keep returning. Yesterday in frustration I decided to uninstall Java until I see some positive news about any patches regarding the ...
0
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1answer
92 views

How to modify a certificate using getTBSCertificate() method

I want to show that if I modify one bit or byte from a given X509 certificate the signature verification results false (because this modification results different hash value from the certificate). ...
0
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1answer
313 views

what freeware tool for java source code review? [closed]

I need freeware tool for source code review for my application which used WebSphere Portal and Java as technology. Please provide me relevant information or links regarding this.
3
votes
1answer
4k views

Java Applet - Need Code Signing Certificate vs SSL Certificate

I'm working on a Java Applet that used to be self-signed. Now that java 7u51 is being used, I am working to get the jar for the Applet signed. I used the certificate/key used for the apache2 ssl ...
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2answers
438 views

How can I determine the Java version running on a remote server?

Short version How can I determine the Java version a remote server is running if I only have access to the server through port 443? Long version I am validating a pentest run by another group. ...
8
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3answers
1k views

Is Java relevant to Information Security?

I'm currently studying Computer Science, where we're teached Java programming. I want to get into the IT-security field, but it seems to me that Ruby and Python are more relevant for that, so I have a ...
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0answers
96 views

Need help to Webservice in Axis2 with https in java

I have written my webservice with https. but as per requirement i should provide authentication. so thought of going with https ssl. could any one help me with steps like moving http to https and ssl ...
4
votes
3answers
383 views

Android and FIPS

I've recently been tasked with a research project to write a "secure messaging application" using "government approved protocols" (the government being the USA). I'm taking this to mean asymmetric ...
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4answers
170 views

How to store passphrase in this situation?

How to store a passphrase with a Java application that periodically needs access to its plaintext form? It is a strange situation, but I am wedged in it. If providing a decent security mechanism is ...
4
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4answers
418 views

Is this java app harmfull?

If you visit most of the "online youtube download" pages, you will get this message: Why all these sites come up with this message? Is it a worm, or just an unharmfull app?
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1answer
239 views

Java Drive By & Stub - Explanation [closed]

I have been trying to make some extensions for chrome lately to block some unwanted stuff. I have also been searching for quite some time to find what a JDB does.So , the applet downloads a file , ...
2
votes
1answer
2k views

How securely random is Oracle's java.security.SecureRandom

There was a lot of news in the past year about exploitable weaknesses in cryptography which originated from weak random number generators. In some cases it was negligence on side of the developers, in ...
8
votes
4answers
2k views

Is there a real risk of exploitation in java code where a null pointer is dereferenced

I'm playing with some generally well written and parsed java code, but there are some oddities thrown up by my code scanning tool. I know a null pointer dereference can crash a program, but assuming ...
4
votes
1answer
209 views

What are the major vulns that affect the Dalvik VM of Android?

I frequently hear about the security risks of using Android. But few people who write articles on this subject ever identify what parts of Android are at fault, nor do they identify design flaws. Can ...
0
votes
1answer
298 views

encrypting a file with an RSA key

I wrote a java program to encrypt and decrypt files using AES algorithm in CBC mode and a random initialization vector. but there is something fundamental I'm not understanding:first I generate a ...
0
votes
1answer
1k views

Java SSL factory connection to SSL server (with just public-key and certificate)

I am trying to connect to a SSL web server. We currently have a pkcs12 file and connect, that is our private-key and certificate. Is it possible to connect using Java code with a public-key and ...
0
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1answer
375 views

Can SHA-1 PRNG still create secure cipher keys?

I am concerned that a SHA-1 PRNG cannot produce an AES-256 cipher key with the expected 256 bits of security, or indeed any secure cipher key where over 165 bits of security are expected. The SHA-1 ...
0
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1answer
989 views

How do Java applet exploits work? [closed]

Browsers store web pages in a local cache on the client's machine. How does a hostile Java applet exploit this information to gain more privileges than it is entitled to? My understanding is that a ...
24
votes
6answers
447 views

How to keep an eye on upgrades, patches and security issues for used open-source libraries?

For a project with many open-source libraries as a part of it, I began to search for information source concerning all upgrades and security issues. The kind of sources I gathered are either ...
2
votes
1answer
375 views

What key to use in HMAC

I need to use HMAC on a certain message to guarantee integrity, but I cannot figure out what are the requirements for the key to be given as input to the hashing algorithm. In particular I have to ...
0
votes
1answer
844 views

What triggers a firewall to block a TCP socket?

I was wondering what would cause a firewall to block a TCP Java socket from connecting. What would trigger that?
7
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3answers
4k views

Reverse engineering and Java

Is java class file or jar file is easy to reverse engineer? Because java generates a class file after compilation and not exe files. Is jar and class files are easy to decompile compare to c# and C++? ...
4
votes
1answer
464 views

How secure is MongoDB wire protocol?

I'm building a JavaFX 2.0 standalone application (it'll be distributed as an .exe) and it opens a connection to a MongoDB instance. The connection is just a standard Mongo connection using the Mongo ...
3
votes
1answer
2k views

What is the best practice for storing a secret on the cloud?

This post on Securing Java Application Data for Cloud Computing offers a good introduction to using a Java KeyStore for securing encrypted data in the cloud. It neglects, however, to answer the ...
10
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2answers
633 views

How can a network observer identify computers running old versions of Java?

I received an email earlier today from my ISP (a university). The email reads (in part): Your network connection has been disabled because your version of Java is not patched for the most recent ...
2
votes
1answer
824 views

Configuring GCM cipher suites in Jetty based server

I have a Jetty based secure http service, and I wish to support GCM cipher suites. I know that Jetty internally use JSSE based ciphers, and there are many GCM ciphers coming with JSSE as documented ...
1
vote
2answers
90 views

Symmetric encryption involving load balancers - can't randomize key?

I'm working on encrypting a web application's cookie. Using symmetric AES/CBC, I encrypt the cookie data before writing it out, and then decrypt it when reading it back in - the standard stuff. The ...
2
votes
0answers
110 views

Grant permission to read java home from untrusted java code

I'm loading untrusted code at runtime and for this reason I'm also writing a custom SecurityManager. This untrusted code however lazy-loads some JRE classes that I do not want to block. Would it be ...
-2
votes
2answers
580 views

Why don't we have any popular decentralized chat systems, social networks etc.? [closed]

Let's say two computers have the same decentralized chat program. Each user has to have an ip address and port number to send the message to another person. Each message is encrypted using, let's say, ...
1
vote
0answers
54 views

Should we allow JSPs to change on a running application server?

Should we allow JSPs to change on a running application server on a production system? My gut feeling is no. However, I can't seem to find any information to justify it. From a performance end, ...
0
votes
1answer
99 views

Java is running even after it is disabled [closed]

To prevent adds and pop-up that seduce users to install or download viruses I have disabled Java. But I have noticed that even with Java disables Firefox is still running it. The pop-ups are coming ...
2
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1answer
172 views

Can Jasper files be used as shells to attack java web apps?

JasperReports is an open source Java reporting tool that can write to a variety of targets, such as: screen, a printer, into PDF, HTML, Microsoft Excel, RTF, ODT, Comma-separated values or XML ...
10
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7answers
913 views

Cheating or service disruption by altering client-side code

A reasonably white-hatted hacker has demonstrated the ability to insert text of his own choosing into the communication between a java applet and a web based server. Not a simple MITM attack, but ...