My 2-cents' in regard to modern mobile devices: Theoretically yes, such as WI-FI and BT MAC; Personally I don't think using unique HW ID is anything bad especially mobile devices nowadays is becoming to be an unique ID itself: Apple Pay, NFC, smart card, face …

However, it can be spoofed/changed rather easily, so it depends on how unique it needs to be. CPU Serial Number: It's not available on lots of older systems, but it's there. Check out this MSDN page. It won't change, but it's bound to a computer. HDD Serial Number: It's likely to not change, but can be a nuisance if the HD fails.

Jul 28, 2010 · A solution I found is to generate a "unique" number (in my case I worked with php, so I used the session_id() number mixed with a number generated with the rand() function, it ends up being a quite big number that will hardly occur twice...) and …

Dec 19, 2013 · I want to automatically generate unique id with per-defined code attach to it. ex: UID12345678 CUSID5000 I tried uniqueidentifier data type but it generate a id which is not suitable for a user id. Any one have suggestions?

Nov 4, 2011 · The shortest way to create a number that you can be pretty sure will be unique among as many separate instances as you can think of is . Date.now() + Math.random() If there is a 1 millisecond difference in function call, it is 100% guaranteed to generate a different number. For function calls within the same millisecond you should only start to ...

Sep 19, 2008 · Starting with Windows 10 1607 ("Anniversary Update" Build 14393), the system can generate a unique device ID via the Windows.System.Profile.SystemIdentification class. GetSystemIdForPublisher() returns a device ID, that

Oct 8, 2012 · Why can't we make a unique id as below. We can use DateTime.Now.Ticks and Guid.NewGuid().ToString() to combine together and make a unique id. As the DateTime.Now.Ticks is added, we can find out the Date and Time in seconds at which the unique id is created. Please see the code.

Oct 20, 2014 · I have to make a class that has int member which is unique for every object of that class. So: public class Cls { private int id; public Cls(){id = unique number;} } So when I make x number of Cls objects, I must be sure that no classes have the same id. But I want to avoid making global variable in main, and setting id one by one.

Apr 15, 2009 · The reference is the unique identifier for the object. I don't know of any way of converting this into anything like a string etc. The value of the reference will change during compaction (as you've seen), but every previous value A will be changed to value B, so as far as safe code is concerned it's still a unique ID.

Dec 11, 2017 · The Linux kernel provides a simple and efficient map data structure, but it is not a general-purpose map. Instead, it is designed for one specific use case: mapping a unique identification number (UID) to a pointer. What does "Unique identification number (UID) to a pointer" mean in this context?