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Re: Doubt in Security basics

Subject: Re: Doubt in Security basics
Date: Tue, 15 Feb 2005 11:26:55 -0500
Babu,

Strings in Java are immutable, meaning you cant change them.  You can
only modify copies of the original.  Because of this, if a password
was read into a String, you couldn't write over it to erase its
contents from memory.  It would be at the mercy of the garbage
collector.

With a char [], you can overwrite the elements of the array and be
reasonably safe that the password is gone from memory.

Kevin


On Tue, 15 Feb 2005 07:28:08 -0800 (PST), Babu Kopparam
<babukopparam@gmail.com> wrote:


Hi! List,

Probably i feel this doubt is related with basic knowledge.

Whenever capturing the password, char[] is used instead of String object. 
What purpose does this solve.
  ---  I am referring to JAVA.

Thanks in advance,
-Babu.


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