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jqa0401.txt

Associated article: Java Q&A

Tags: Web Development     Security     Tools     Design    

Published source code accompanying the article by David Wincelberg in which he uses the javax.crypto package to adds security to Java-based e-commerce systems by encrypting/decrypting user's credit-card numbers. Also see JQA0401.ZIP.

					Java Q&A
by David Wincelberg

Listing One
public class CCNumber {
    public static String removeSpaces (String ccNum) {
        if (ccNum == null) return "";
        int length = ccNum.length();
        StringBuffer sbuf = new StringBuffer();
        char c;
        for (int i = 0;  i < length;  ...
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