I have the code for reading the available key from the File using
the KeyStore. But, i have tried my best to store the generated key into
the File and i m not able to. Can some one help in these.
Thanks in Advance!

I am attempting to generate a keystore for a client to enable them to
bypas the security warning received in the browser. My problem is, they
obtained the certificates without generating a certificate request
using keytool, so no matter how I import their certificates into my

My program needs to sign and verify a message. The message is very small
like 64 bytes only. Do I still need to create a message digest (Hash)
for this? Or hashing is just needed to reduce data size?
In other words, if I encrypt my message with private key to create

How can I get a certificate from a Certificate Authority with a java
application?

I have POJOs acting as API to the application. How can I implement
authorization? I tried
  Subject s = Subject.getSubject(AccessController.getContext());
  Set<Principal> ps = s.getPrincipals();

I've had a problem that has been puzzling me for weeks now.
I've been provided with a file from my client which is suppose to be a
private key (in DER format?) which is in the format privateKey.key. My
aim is to eventually use that key for the symmetric signing of data.

I wrote a client that binds to a openldap directory via GSSAPI. The
problem is that the connection times out to soon (~30min). Hence my
question: Can I set the timeout in the client or do I have to set it in
the LDAP server configuration (and if yes, how?).

I create DES key:
Key keyOne = KeyGenerator.getInstance("DES").generateKey();
byte[] keyCode = key.getEncoded();
Now I want to create keyTwo identical with keyOne, based only on

I am trying to sign and verify simple text message. The problem is, that
it even most simple code doesn't work:
KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA");
gen.initialize(512);

I am looking for general security issues concerning java:
Are there programming guidelines for writing good and secure code?
Are there any security problems known?
In C, there is the problem of stack overflow.