AWS SDK for .NET Documentation
UseSecureStringForAwsSecretKey Property
AmazonAmazon.SQSAmazonSQSConfigUseSecureStringForAwsSecretKey Did this page help you?   Yes   No    Tell us about it...
Gets and Sets the UseSecureStringForAwsSecretKey property. By default, the AWS Secret Access Key is stored in a SecureString (true) - this is one of the secure ways to store a secret provided by the .NET Framework. But, the use of SecureStrings is not supported in Medium Trust Windows Hosting environments. If you are building an ASP.NET application that needs to run with Medium Trust, set this property to false, and the client will not save your AWS Secret Key in a secure string. Changing the default to false can result in the Secret Key being vulnerable; please use this property judiciously.
Declaration Syntax
C#
public bool UseSecureStringForAwsSecretKey { get; set; }
Remarks
Storing the AWS Secret Access Key is not recommended unless absolutely necessary.
See Also

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)