import win32com.client
 
client = win32com.client.Dispatch('OpcLabs.EasyOpc.UA.EasyUAClient') 
 
client.Isolated = true
client.IsolatedParameters.Session.LocaleId = "de-DE"
client.IsolatedParameters.Session.EndpointSelectionPolicy.AllowedMessageSecurityModes = 1    #UAMessageSecurityModes.SecurityNone
 

using System;
using System.ComponentModel;
using System.Drawing.Design;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using OpcLabs.BaseLib.Annotations;
 
namespace OpcLabs.EasyOpc.UA
{
    /// <summary>
    /// Specifies what security should be applied to messages exchanges during a Session.
    /// </summary>
    [CLSCompliant(true)]
    [ComVisible(true)]
    [Description("Specifies what security should be applied to messages exchanges during a Session.")]
    [Designable]
    [Editor("OpcLabs.BaseLib.Design.FlagsEnumEditor, " + BaseLib.AssemblyNames.BaseLibDesign, typeof(UITypeEditor))]
    [Flags]
    [Guid("9E047321-4643-4BA1-8CD8-5CD6F3F3B464")]
    public enum UAMessageSecurityModes
    {
        // Users sometimes confuse None for SecurityNone. We are trying various ways to prevent it from happening.
        /// <summary>
        /// No security mode is specified. DO NOT USE - ENDPOINT SELECTION WILL ALWAYS FAIL. Did you mean <see cref="SecurityNone"/>?
        /// </summary>
        [Browsable(false)]
        [CompilerGenerated]
        [Description("No security mode is specified. DO NOT USE - ENDPOINT SELECTION WILL ALWAYS FAIL. Did you mean SecurityNone?")]
        [EditorBrowsable(EditorBrowsableState.Advanced)]
        [Obsolete(
            "This choice disables all message security modes, therefore it is not possible to select any endpoint with it. " +
            "To allow endpoints with no message security, use SecurityNone instead.")]
        None = 0,
 
 
 
        /// <summary>
        /// No security is applied.
        /// </summary>
        [Description("No security is applied.")]
        SecurityNone = 1,
 
        /// <summary>
        /// All messages are signed but not encrypted.
        /// </summary>
        [Description("All messages are signed but not encrypted.")]
        SecuritySign = 2,
 
        /// <summary>
        /// All messages are signed and encrypted.
        /// </summary>
        [Description("All messages are signed and encrypted.")]
        SecuritySignAndEncrypt = 4,
 
 
 
        // Combinations
 
        /// <summary>
        /// Any mode that is secure.
        /// </summary>
        [Description("Any mode that is secure.")]
        Secure = SecuritySign | SecuritySignAndEncrypt,
 
        /// <summary>
        /// All possible security modes, including no security.
        /// </summary>
        [Description("All possible security modes, including no security.")]
        All = SecurityNone | SecuritySign | SecuritySignAndEncrypt,
    }
}