What is the use of Password datatype on the ComponentModel.DataAnnotations?

I applied this annotation of type Password to one of my attribute on the DataModel attribute like following

[Required, DataType(DataType.Password)]
public string Password { get; set; }

but there is not enough documentation I found on MSDN or on the Net that what kind of validation does it imply on the model. Can someone please share some information on this one?

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