No, not sin, Social Insurance Number (s), that SIN.
If the Social Insurance Number were given out each time a Canadian requested it, the maximum encodings would be limited. The limit would be simply 999,999,999. That seems like a huge number, and why would anyone worry about running out of numbers in this program? The Social Insurance Number has become the de facto standard for identification in Canada. It is a number to be guarded closely, so each number is significant.
Here are some points to think about regarding this number:
- No one has the Social Insurance Number 000 000 001. Numbers like that are likely not even used, so there aren’t as many numbers as we believe. Is the exact number of available SINs published anywhere? I don’t think it is, but maybe I missed out on that.
- From 1973 to 1994, the three-digit prefix (the first three numbers) went up by about 265. This is if I compare my SIN to my children’s SIN. That is not an insignificant increase. From 1994 to 2005, the prefix digits increased by 035. This assumes that the numbers are allocated in increasing order.
- There are no more plastic SIN Cards being made. You get a letter with your SIN and that is it!
- Given 900 SIN were lost with the Heartbleed bug, how many more digits are lost due to identity theft and such?
- Is there a recovery program for digits after someone dies? I don’t think so.
- Temporary SINs have 9 as the first digit, and depending on where you apply your leading digit will reflect that (see Wikipedia for this)
- There is a checksum to easily figure out if a SIN is real or bogus.
Fear Monger?
Am I just fear-mongering now? It's possible, but I just wonder if we are going to hear in about 20 years that the Social Insurance Number will go from being a 9 digit number to either:
- A 9 digit hexadecimal number (base 16) (e.g. DEA DBE EF9 )
- A 12 digit regular number
These fixes would be simple. However, every program that used the SIN for identification would need to be recoded. Can you say Y2K ? .
I know this is an old post, but I wanted to comment and say that there are 90 million possible valid SINs, with 10 million SINs for each starting digit from 1-9. Excluding temporary residents who receive SINs starting with a 9, that leaves 80 million possible SINs for Permanent Residents and Citizens. The population of Canada as of 2017 was 37 million, and projected to be 43-68 million by 2061 (statcan). It doesn’t seem likely that we will run out of SINs for a half century even with aggressive population growth estimates.
Although maybe by the end of this century we might be closer to running out. Good to know, thanks for the great comment. 🙂
Okay so I’m even later and my math isn’t perfect but here’s what I got.
There are 1 billion possible 9 digit numbers. However as for valid,unused, sin numbers?
Theres first the issue of the luhn algorithm. The luhn algorithm generally drops a check digit leaving a payload. Sin numbers technically don’t. Which means only 10% of the 1 billion 9 digit numbers satisfy the algorithm. Or 100million.
Then there are 25 million SIN numbers already issued, and about 2500 luhn satisfying numbers that likely are too easy to guess to be used as real SIN numbers
That leaves 74,997,500 valid SIN Numbers remaining. But it’s technically even less. Only about 65% of SIN numbers are actually for permanent residents or citizens, because sins starting with 8 & 0 aren’t valid, 9 is for temporary SINs, & 3 is also sometimes used for temporary residents.
Leaving only about 48,748,375 numbers, the government issues new ones & replacement ones at a rate of about 1,502,500, about 500k of those temporary as far as I could find
So with the aforementioned remaining left, not accounting for population growth. There’s about 50 years of social insurance numbers remaining. 45 if they keep dipping into 7 start SINs to bolster the small number of Businesses SINs that are issued (that’s where all the 8 starters are, & why they aren’t used for people)
However not all that many things require a sin anymore, but used to, leading to hundreds of thousands or millions of SINs being leaked to scammers, hackers via ransomware, or the dark web, like how government legalized monopoly Nova Scotia power just was revealed to have 140000 SIN numbers from the old days when you needed one to get on the grid, that they never should have kept, that got stolen out from under their shitty cyber security and posted for sale AND sold on the dark web. Now not many people go ahead and replace them because that won’t save you from fraud or id theft anymore, but still those SINs probably are compromised permanently, as well as any replacements people get.
So the question isn’t so much will we run out as – will the sin survive long enough as a secure identity number to run out of numbers in 2075?
It’s 900M possible SIN’s, not 90M. We have a decent way to go still
Not a simple equation there are a bunch of check digits in there. But yeh, I think we are OK for now. All they need to do is add another 3 digit prefix, or better still start working in hexadecimal, then they are completely fine.
My parents got me a card back when I was little – likely to do with RESP contributions. All I know is I have this horrible, bubble-letter signature on the card from when I was about 10. My fiancé laughs at me about it because it looks so childish on such an important piece of information. Not that I really use the card for anything considering that number just gets rattled off automatically 🙂
Did not know that about SINs. I always mix my SIN # up with my university ID #. Why I still remember that number, I don’t know. I can’t even remember my sister’s phone number that she recently changed. Well, maybe I do know but don’t want to admit it. Kinda like when the kids come over and say “Why do you have on the TV so loud?” FML
Thanks for the info on the check sum. Some of the tax software I’ve experimented with rejects randomly made-up SIN numbers for test files. Now I know better how to get around that problem.
Are you sure about the ‘no more plastic cards’? My wife got a new one last year (got PR status), it did also come with a letter.
It does not have the name or numbers extruded(?) like a credit card though, unlike the older ones.
Never mind.. the link has it in the first line.. guess we lucked out.
No worries, I will now treasure my little white card forever! 🙂
My wife loves my SIN card .. because I signed it when I was 8.
She laughs every time she sees it.
>>>I don’t think you’re fear mongering.
Oh, pretty sure he is :). Running out of SIN numbers doesn’t seem like something we need to be worried about. They can just add a digit or throw a letter into the mix.
But if we are going to fear monger there’s other stuff reducing the number available – some of the combinations are reserved for specific statuses. I don’t know what they all are, but apparently you can tell someone’s residency or citizenship status from the last few digits of their number.
Frankly, I’m more worried about running out of IP addresses. And I’m not worried about running out of IP addresses at all :).
We RAN out of IP addresses a long time ago, that is why IPV6 exists (and is very slowly being adopted). You should worry about the IP address thing if you are on the Internet, the longer we stay on old addressing, the easier it is for hackers to hide.
I wondered why my kids had lower SINs than my wife and me, it turns out that the first digit of the SIN indicates the region where it was assigned-2&3 for Quebec, 4&5 for Ontario and 6 for the prairies for example. So the 265 difference between you and our kids must be due to your SINs being issued in different provinces.
Not all SINs are valid, SIN numbers must pass a checksum which detects many transcription errors. Because the checksum detects all single digit errors and most adjacent digit transpositions, there are “only” between 100 and 200 million valid SINs. Ontario will probably be the first to overflow its SINs starting with 4 or 5 and need to start using SINs starting with 8 or 0, which currently aren’t assigned.
http://en.wikipedia.org/wiki/Social_Insurance_Number
I like the fact that if your SIN starts with a “9” it is for temporary residents, wonder if they reuse those?!? Good link, thanks!
Another factor that you haven’t mentioned is that the SIN has to pass a checksum algorithm that I believe makes 9 out of 10 possible numbers invalid.
I don’t think you’re fear mongering.