Skip to main content

Diffie-Hellman Algo simple Example

Here is the example to show simple calculation :

  1. Alice and Bob agree to use a prime number p = 23 and base g = 5 (which is a primitive root modulo 23).
  2. Alice chooses a secret integer a = 6, then sends Bob A = ga mod p
    • A = 56 mod 23 = 8
  3. Bob chooses a secret integer b = 15, then sends Alice B = gb mod p
    • B = 515 mod 23 = 19
  4. Alice computes s = Ba mod p
    • s = 196 mod 23 = 2
  5. Bob computes s = Ab mod p
    • s = 815 mod 23 = 2
  6. Alice and Bob now share a secret (the number 2).

Done :)

Comments

Post a Comment

Popular posts from this blog

show image in asp.net form from database

In order to show image from database to webform first add an image control in webpage.   <asp:Image ID="imgStudentImage" runat="server" Height="157px" Width="160px" /> Then add new webform to read image from database for example displayimage.aspx and in code behind model write the following code. public string str = //your string     public SqlConnection conn;     public SqlCommand sql = new SqlCommand();     public SqlDataReader dr;     public string strSQL;     protected void Page_Load(object sender, EventArgs e)     {         conn = new SqlConnection(str);         conn.Open();         long id = Convert.ToInt64(Request.QueryString["mId"]);         strSQL = "";         strSQL = strSQL + " SELECT snap from S...
Post a Comment
Read more

Export Doc,Access,Image,CSV,Excel,Pdf,XML,HTML,Text,Print of Gridview in Asp.net

First import itextsharp.dll in the solution and use three namespces (basically for pdf) using iTextSharp.text; using iTextSharp.text.pdf; using iTextSharp.text.html.simpleparser;          Then Use the following code :- on each button  click  protected void Page_Load(object sender, EventArgs e)         {             if (!Page.IsPostBack)             {                 BindGridDetails(GridView1);             }         }                 protected DataTable BindGridDetails(GridView GridView1)         {   ...
1 comment
Read more

Ip Sec Internet Security Basic Structure

The IPsec suite is an  open standard . IPsec uses the following  protocols  to perform various functions: Authentication Headers (AH)  provide connectionless  integrity  and data origin  authentication  for IP  datagrams  and provides protection against  replay attacks . Encapsulating Security Payloads (ESP)  provide  confidentiality , data-origin  authentication , connectionless  integrity , an anti-replay service (a form of partial sequence integrity), and limited traffic-flow confidentiality. Security Associations (SA)  provide the bundle of algorithms and data that provide the parameters necessary to AH and/or ESP operations. The  Internet Security Association and Key Management Protocol  (ISAKMP) provides a framework for authentication and key exchange, with actual authenticated keying material provided either by manual configuration with pre-shared keys,  Internet Key Exch...
1 comment
Read more