TypeKeySecurity library documentation

TypeKeyIdentity.IsEmailHashed Method 

Whether the Email field is a SHA-1 hash or an actual email address.

public bool IsEmailHashed();

Return Value

Returns true if it's a SHA-1 hash.

Remarks

If the authentication occured with needEmail set to true, then the actual email should be available.

See Also

TypeKeyIdentity Class | TypeKeySecurity Namespace