2335: Photo Deposit

Explain xkcd: It's 'cause you're dumb.
Revision as of 23:02, 20 July 2020 by 108.162.216.154 (talk) (Elaborated on the consequences of various system designs)
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Photo Deposit
It's okay, they scan the serial numbers and make sure you can't deposit the same bill more than once.
Title text: It's okay, they scan the serial numbers and make sure you can't deposit the same bill more than once.

Explanation

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If you can address this issue, please edit the page! Thanks.

Some mobile banking apps allow users to deposit checks through the app. The comic parodies this by "depositing" cash via a mobile app. This leads to duplication of the money, since you could then spend the bill and still have its value (in your account). Checks cannot be duplicated by this method, as a check is, in some ways, an instruction for one bank to send money to another.

The title text states that the app recognizes the serial numbers on the bills and prevents users from depositing them multiple times. It is unknown if multiple users can deposit the same bills. If multiple users are allowed to deposit the same bills, then widespread fraud would certainly occur from users attempting to collaborate by sharing bills. If users are not allowed to deposit the same bills, widespread frustration would inevitably ensue as users would be frustrated to learn that they could not deposit many of their bills. Thus such a system would run into trouble either way. Furthermore, even with a user being unable to deposit the same bills twice, they will still double the value of their cash, as they have a spendable copy of it in their account and they still have the original which could be spent outside the bank system.

In addition, the system would be highly vulnerable to counterfeiting. When depositing or paying with cash, the texture of cash is different from normal paper and therefore is a method to detect counterfeits. (In the U.S., bill are made from a sort of cloth. Other nations such as Canada and the U.K. have started introducing plastic banknotes.) In contrast, the low-resolution camera of a smartphone could be fooled by a printed image, or possibly even an image on a screen, effectively enabling an attacker to clone an arbitrary banknote without actually possessing it; enabling a determined person to arbitrarily lower the purchasing power of existing money significantly, without issuing any new money.

Transcript

Ambox notice.png This transcript is incomplete. Please help editing it! Thanks.
[Megan is holding a (cash) bill in one hand, and is taking a picture of it with her smartphone with her other hand. Cueball is holding a (cash) bill in one hand, and is looking at his smartphone in his other hand.]
Cueball's phone: Deposit accepted!
Megan's phone: click
[Caption below panel:]
After a lucrative six hours for us, our bank removed the new feature in their app that let you deposit cash by taking a picture of it.


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Discussion

Depositing cash through a smartphone app was one of the silliest and most useful features in GTA V. Unfortunately, depositing money would not duplicate it. Presumably the characters in the game are very honest and trustworthy, destroying any cash instantly after scanning it in. This honesty is to be expected from thieving killers such as these.

You can also withdraw cash via the app. How that works is beyond me.

--NeatNit (talk) 23:38, 20 July 2020 (UTC)

Maybe the phone has like a teleporter that teleports the money and like prints it out? --172.70.126.179 12:30, 1 October 2022 (UTC)

A frequent joke in "The Goon Show" on 1950s British radio was the offer of a printed photograph of usually a small sum of money, treated as the photograph actually having value itself. Sometimes it's a phonograph disc. And sometimes the money represented turns out to be a forgery. In a less silly context, the photograph might be considered as an I.O.U., as evidence that the money exists and will be paid... which is what a banknote is, really. But in practice someone influencing you with pictures of money might be dishonest. Bank advertising for instance.

Wikipedia's article on "The Goon Show running jokes" (!) doesn't mention money photographs, although there is a reference to handing out pictures of Queen Victoria, especially in historical stories. Pictures of Queen Victoria may be on older money, but these ones don't seem to be.

Robert Carnegie [email protected] 141.101.98.26 08:18, 21 July 2020 (UTC)

Search for "photo"(graph) in http://www.thegoonshow.net/scripts_show.asp?title=s06e07_foiled_by_president_fred for the instant(s) that came straight to my mind, being recently broadcast. (I assume you're familiar with LSD?) 162.158.159.14 09:38, 21 July 2020 (UTC)

"Other nations ... have started introducing plastic banknotes" Lol. Australia had *finished* introducing plastic bank notes 30 years ago. [1] Boatster (talk) 01:43, 21 July 2020 (UTC)

Hmm. How much money would that be? Say each photo is 4MB and your upload speed is 25 or so Mb/s. Each upload would take about 1.3 secs. We'll round up to 1.5. To keep it simple, we'll say that they have a stack of bills, and are able to scan each new bill within those 1.5 seconds. Now, if the bank allows you to upload $100 bills, without any rate limiting, you'd be able to make $400/min (the same as the what if article, weird). Which means that in six hours, they could make $144,000 dollars! Of course, this is mostly guesswork, but it should be somewhere in the ballpark. Could be a little more: Smaller photos, better network. Or a lot less: Most people don't have $144,000 in cash ready at a moment's notice, and scanning could take more than 1.5 secs. Of course, if this was a feature that was announced, and they had time to prepare.... 108.162.245.102 04:11, 21 July 2020 (UTC)

$100*(60/1.5)sec = $4000 per min, or $1.44 million in 6 hours. You forgot that there are 2 phones, so double that. Also, you wouldn't need ALL the money, you (or an assistant) can take the money already scanned to another bank and swap it for new cash, repeat. 162.158.123.173 17:57, 22 July 2020 (UTC)


The feature of depositing check is this new or old... Is it something from before or after the Corona outbreak? It is a smart feature to avoid visits to banks during the pandemic - also the money thing, which of course is not realistic irl. --Kynde (talk) 09:19, 21 July 2020 (UTC)

depositing checks by smartphone is old, going back to 2018 if not earlier, and the depositing of currency could be realistic if bills used blockchain ledger entries instead of easily guessed serial numbers and everyone verified every currency transaction against the blockchain every time (this would end counterfeiting as a side effect). 162.158.63.172 09:53, 21 July 2020 (UTC)
Yes but that entirely defeats the purpose of cash, if you have to verify every transaction against a database. Also blockchain is entirely unnecessary. Probably not Douglas Hofstadter (talk) 06:11, 22 July 2020 (UTC)
The Chase app started allowing deposits ten years ago. See this article from ten years ago today: https://phys.org/news/2010-07-banking-deposit-smart-phone-photo.html Orion205 (talk) 03:44, 22 July 2020 (UTC)

Is it by the way illegal to even take a picture of banknote? I know printing one out is... Even if only one side and not very good quality. --Kynde (talk) 09:27, 21 July 2020 (UTC)

if taking pictures of banknotes is illegal then bank security cameras (and security cameras in many retail establishments and casinos) are routinely breaking the law. Also, aren’t change machines taking a picture as part of their anti-counterfeiting circuits? 162.158.63.172 09:58, 21 July 2020 (UTC)
Even printing banknote is legal if you follow some rules. I read that you need to make it bigger than 150% or smaller than 75% of real size, although details may vary depending on country. Of course, doesn't change the fact that your graphics program might refuse to work with that image and your printer may refuse to print it. -- Hkmaly (talk) 23:39, 21 July 2020 (UTC)
Not to mention that the act of depositing a check over a smartphone has been a thing for several years, so all the banks that offer this feature would be breaking the law as well. 162.158.63.172 23:12, 1 August 2020 (UTC)

I know it's acceptable in the 'colonial' idiom, but seeing "cheques" spelt as "checks" always confuses me for a micromoment. As well as imagining a test/verification being somehow a bartered service, I'm only just getting past it also being a bill-of-fare (in the UK we may pay a bill with a cheque, over there you can pay a check with a bill). But carry on carrying on! I'll get my coat. (If I can find the coat-check.) 162.158.159.100 10:01, 21 July 2020 (UTC)

Yes, we need to spell it as "chex" 162.158.123.173 17:46, 22 July 2020 (UTC)
Rice or wheat?

Why is cryptocurrency in there, it seems tangential at best? Djbrasier (talk) 19:01, 21 July 2020 (UTC)

The more paranoid (or stand-offish for their own good reasons) Crypto users might not even connect bitwallets electronically but pass a transaction-code by other means (retyped from hardcopy, or rescan an on-screen generated QR, depending on requirements) and then rely upon the decentralised 'audit book' checking and authorising that transaction with minimal[citation needed] risk of subsequent tracing-and-linking-together by The Man/whoever. I think it's both far too paranoid and not paranoid enough, in equal measure, if you're trying to keep your associations off-grid, but it seems there are those who seem to like doing it that way. 141.101.98.222 20:35, 21 July 2020 (UTC)
cryptocurrency seems relevant, as the subject is about transmitting currency electronically and 'crypto' is about the closest thing you can get to real electronic cash 162.158.75.162 15:21, 23 July 2020 (UTC) Sam

The explanation seems excessive, given how obvious the joke is. Gvanrossum (talk) 04:58, 22 July 2020 (UTC)

Curse my memory over ~10-15years! I vaguely remember a traveler focused bank that accepted cash deposits. They'd add the amount to your account, you could spend it and they'd cover the costs, and if you didn't have the bills submitted to one of their locations across the globe within a certain amount of time they'd rip you a new one in fees. The photos had to be perfect, and even then they were up for review and could be rejected by a human who didn't like the background it was sitting on. I remember my parents only ever used it once and needed my help understanding it so it was just right. 108.162.216.34 18:50, 22 July 2020 (UTC)

This reminds me of that time Domino's allowed you to earn points to a free pizza by taking pictures of pizza. 172.69.34.44 22:34, 22 July 2020 (UTC)

When you got your free Pepperoni from that, did they put the slices on in the EURion pattern? ;) 162.158.154.71 23:03, 22 July 2020 (UTC)
I didn't actually do that. I'd rather eat somewhere else. 108.162.215.124 19:06, 25 July 2020 (UTC)

I wonder if Randall is subtly responding to the current coin shortage in the US, and the following wave of conspiracy theorists call it as a sign of an oncoming "cashless society" 162.158.75.162 15:21, 23 July 2020 (UTC) Sam

I hadn't heard about that, what states or news agencies are talking about that? 108.162.216.210 18:02, 24 July 2020 (UTC)


Am I the only one that has contemplated this concept before, and consider it theoretically workable-ish, with the addition of a feature to destroy (burn or otherwise) the original bill? Obviously there'd be other complexities, such as preventing countermeasures to the destruction, and where does the bank's copy of the money come from (presumably register the cash as destroyed to the government, and the treasury pays the bank accordingly.)

The other similar context where I'd like something similar is with modern video game systems, such as the PS4, where the physical disk isn't actually used for playing the game, other than as an alternative to downloading it, and to verify you still own a copy. I find it much more convenient to just select between downloaded games without a disk, yet occasionally still have to insert or remove a disk given as a gift, or included with the system. I'd love an option for the PlayStation itself to destroy the disk, and in the process add a copy of the game to my account, so I'd no longer need to mess with the disk at all. PotatoGod (talk) 06:12, 17 August 2020 (UTC)