Expiration Date Reader
Faith Lienhard
Card as in debit or credit cards. I heard that even showing someone your debit/CC can be considered an exploit not because of the number or name, but because of the date of expiration. He said that working backwards from that date they can tell exactly when it was first issued and can keep going from there on. I wanted to know if this is a real concern or just a hunch.
No. The date on the card is set by the issuer. So the length of time can be different from vendor to vendor. Even might be different depending on the card or account type. So you would have to know exactly what that time frame is to get the issue date. The issue date is also not a security question at financial institutions to verify the identity of a customer. Whereas the expiration date itself might be. But not enough on it's own. So phishing would be an unlikely use for the date unless you already had additional information about the customer. (IE Last 4 of social, last deposit amount, account number, other information about that card, etc) All of which are impossible to get from the date.
Sounds like aggrandizing (or maybe paranoia), technically someone can only use it to narrow down when the card was issued, but no places that I know of use the expiration date or the issue date for any sort of standalone verification so alone it is quite worthless.
You can't tell when it was first issued since a replacement out of cycle (say if you lost your card) resets the date, and I for one have replaced every card in my wallet at least once due to loss so looking through my cards' expiration dates would tell you nothing about me except maybe the months in which I am forgetful about where my cards are. If you really wanted to know when it was issued, some banks still use the "member since xx/xx" on their cards, which is a clearer way to get at a rather useless piece of information.
I suppose one possible exploit would be to start going through the target's mail a month or two ahead of the expiration with the hopes of lifting the replacement that's sent, but that's a pretty long con. Far more important, if you are glancing at the card, are those epic last four digits.
The expiration date tells you that the card was issued in that month within the last five years (one of five possible values). The expiration date by itself does not tell you much, and certainly far less than the average Facebook profile leaks about you.
It does not leak your postal code (often required for unattended purchases), your PIN, your CVV, the last four of your Social Security Number, when you initially established the account, what type of card it is (Visa/MasterCard/etc), your spending habits, your preferences, or ... well, anything at all. Any bank that you might try to verify stuff with is going to need more than the expiration date of one of your cards before they'll let you do anything damaging.
Self-signed digital IDs expire in five years. After the expiration date, you can use the ID to open, but not sign or encrypt, a document. In Acrobat, click the Edit menu and choose Preferences > Signatures.
Actually I was referring to certificate-based signatures, in particular using self-signed Digital IDs. I see that the validity period is by default 5 years, and I need to understand what happens after expiration. I guess the digital ID can no longer be used for signing, but is the signature on a pdf (made when the ID was valid) still readable, and can it be validated?
Checking PDF expiration in Adobe Reader 9.5.5 is important because it ensures that the document is still valid and has not been tampered with since it was created. It also helps to prevent security risks and ensures that the document can be opened and read properly.
To check PDF expiration in Adobe Reader 9.5.5, open the PDF document and click on the "File" menu. Then, select "Properties" and go to the "Security" tab. Under "Document Restrictions Summary," you will see the expiration date for the document.
When a PDF expires in Adobe Reader 9.5.5, it can no longer be opened or viewed. The file will be locked and cannot be accessed until the expiration date is extended or removed by the creator of the document.
Whether Pay-Per-Ride or Unlimited Ride, every MetroCard has an expiration date. The date is located at the upper left corner on the back of the card. The expiration date is usually about one year from the date of purchase.
If your Pay-Per-Ride MetroCard expires, you have two years from the expiration date to transfer any remaining money to a new card. Within the first year after expiration, use a MetroCard Vending Machine to transfer the balance to a new card. After that time, the expired MetroCard must be sent to MetroCard customer claims. Ask the station agent for a postage-paid Business Reply Envelope.
Our goal every day is to give you the best service possible and, when something goes wrong, to fix the problem as quickly as we can. We do our best to get service moving again or to give you options to take another train or bus.
Not every date you see on your food is an expiration date. Here are four common dates you may see in the grocery store and what they really mean, according to Business Insider:
Sell-by date: How long the store has to display the product
Use-by date: When manufacturer thinks the product will be at its peak quality
Best before date: The best date for flavour and quality
Closed by date or coded dates: The packing number that the manufacturer uses
Fish are no less prone to bacteria than meat and should be consumed in one or two days after purchase. Otherwise, Whole Foods advises tightly wrapping it in moisture-proof freezer paper or foil and put in the freezer.
Is your card expired? GWorld card functions stop working based on the expiration date printed on the card. If you are still working or studying at GW after your card expires, make sure you have completed all renewal requirements and bring your expired card to the GWorld Office to be reissued a new card. If your card is still working but about to expire, you can come to the GWorld Office on or before the expiration date to be reissued a card for continuous, uninterrupted use.
Your new card will be issued free of charge if you turn in your current GWorld Card regardless of your role at the university. You will be charged a $25.00 replacement fee if you do not turn in your expired card.
If you need access to your department suite, academic building or any other location, the approver for the GWorld reader location can request access on your behalf. Contact an office administrator in your department or the building for assistance.
If you are not able to figure out who to contact to help you with your access, call or email the GWorld Office at [email protected] or 202-994-1795 and we will assist you. It is better to call or email. If you walk into our office for assistance, we will need time to review your situation and you may need to come back again. Contact the GWorld Office for assistance.
Does tapping your card result in neither lights nor sounds from multiple readers? It is likely the chip in your card has died. GWorld cards have computer chips that can eventually fail. This can happen from both normal uses and excessive bending or putting pressure on your card. Bring your non-functioning card to the GWorld Office, and a new card will be issued free of charge.
Are you using an old card that has been replaced? Whenever you replace a lost or stolen card your old card is deactivated. You cannot reactivate a previously replaced card. You will either need to find your active card or purchase a new card from the GWorld Office.
Are you registered for parking? You must register with Parking Services before you can start using your GWorld card for parking access. Note: Faculty, staff and students are eligible to register for parking. Parking permits are not available for contractors or visitors.
Do you have enough money on your card? You must have $16.50 (daily, Monday-Friday fee) on your card when you enter to be able to successfully exit the garage. Note: lower rates apply to nights and weekends. You may add funds by making a deposit on your card.
The parking system requires you to swipe or tap in and out of the garage to complete the transaction. If the gate was up or you were unable to swipe/tap the last time you exited the garage, then the Parking Office will need to manually adjust your account before you can re-enter the garage. Please contact Parking Services or the GWorld Office for assistance.
The GWorld Office and GW Police Department take all reports of fraud seriously and investigate all disputes to the fullest extent possible. You will not be held financially liable for any charges found to be fraudulent or erroneous. Investigations take a minimum of 14 business days but can take longer depending on the case. You will be notified by the GWorld Office or GW Police Department of the outcome when an investigation is complete. Charges found by the investigation to be fraudulent or erroneous in any way will be refunded in full back to your GWorld Card.
Duplicate or questionable charges are usually due to cashier or equipment errors. Please contact the GWorld Office if you notice any erroneous charges on your GWorld Card. We will work with the vendor to correct any mischarges, and typically those corrections are processed within five business days.
Today I found a small problem in the "Link/Edit a credit/debit card" area. I was adding the requirements for linking a new credit card, yet, I checked everything to seem alright, there was a error with the expiration date. I was writing the exact expiration date seen on the card. I checked thoroughly to see if anything was wrong, but there wasn't a single typo I wrote. It just said, "Check and try agian." I am on MAC, and the expiration date is written like an example 02/18, or is it written in a different way?
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