Most of what you are looking for is available on the Apex Flex implant. But there are some big caveats.
Unlike most of the other implants sold on DT, the Apex is capable of running a variety of applets that are installed using a phone. By itself the chip doesn’t do much other than have a unique, um-modifiable UUID. But there are applets that can do most of what you are asking for.
storage of data that can be edited/updated at any time wirelessly .
There are multiple ways of doing this, but the easiest is with the NDEF applet. The applet allows the P71 chip inside the Apex to function as an NTAG chip with a customizable amount of storage. NTAG chips can be used to store small amounts of data, such as contact info, URLs, etc. Depending on the format of the record, most phones will automatically take certain actions when scanning an NTAG chip, such as asking the user if they want to add a person’s contact info.
storage of ID information (scannable via phone)
See the answer above. Yes, but the ID information is just whatever the user programs into it. There is no way to store anything official, like a government ID that would be recognized by a bank or something like that. The storage space on the Apex Flex is limited, and depending on what other applets you have installed, you may only have space for a small amount of information.
serving as a Security Key, much like an implanted Yubikey
This is where the Apex Flex shines! There are applets that let it function almost identically to a Yubikey. The FIDO2 applet will let you use the implant to securely sign in to any sites that accept a FIDO token. Gmail, Facebook, this forum, and many others. There is another applet called OTP that generates the same style 6-digit time-based codes that Google Authenticator or Yubikey Authenticator produce. Just like with a Yubikey, the secret that generates the codes is stored directly on the implant, so losing your phone won’t compromise your accounts.
unlocking/locking car/house
Maybe. It depends on your car. There is a Tesla applet available for the Apex Flex, and I think there might be some others in the works. Unfortunately, most RFID locks (like a deadbolt or door handle) will not work with the Apex Flex. Those locks are usually designed to only work with a different line of RFID chips, and they typically won’t recognize the UUID that is transmitted by the Apex.
permanent storage of information such as a decryption key or PGP key
There is a PGP applet available for the Apex Flex. It can both store and generate PGP keys. However, the space on the P71 chip inside the Apex is pretty limited, especially if you have a bunch of applets installed. So while you could store a small amount of information securely, it is best used to only store a private key that can be used to decrypt information stored elsewhere. Such as in a KeePass Database
more
The KeePassXC app is an open-source password and data manager that stores usernames, passwords, and any other kind of information you want in an encrypted database. There are apps available for Windows, Mac, Linux, Android, and iOS. It takes a bit of setup, but you can use the HMAC applet on the Apex Flex to work as a 2nd authentication method for a KeePassXC database on both desktop and Android (I don’t think it works on iOS yet). If you keep your KeePassXC vault on a cloud storage like Google Drive, then you have an almost unlimited amount of encrypted storage. Everything is protected by both a password and the secret key stored on your Apex.
wireless payments
No, this is the one thing the Apex cannot currently do, and likely will never be able to do. It has the technical capabilities to function as a payment chip, but there are no banks or credit card companies that yet allow implantable chips to emulate a credit card. Its possible that a bank in the future allows this, but it seems unlikely. The Apex Flex is provisioned with software from a company called Fidesmo. Fidesmo has partnerships with quite a few banks, mostly in Europe. And external Fidesmo devices can be used for wireless payments. But if you really want a chip that can make payments, your only option right now is to have a custom payment conversion (basically you take the chip out of a credit card, send it to Dangerous Things, and they will convert it into an implant). But its a one time thing. When the credit card expires, it becomes useless and you have to take it out and get a new one implanted.
Other than payments (and probably locking your house), it sounds like the Apex Flex would be a great option for what you are looking for. But a couple of other things to keep in mind:
- Storage space on the Apex chip is limited. You most likely won’t be able to fit all of the applets I mentioned on the chip at the same time. You can delete and install applets very easily though, so you can swap them out as needed.
- If you are considering getting one, research other posts on this form to learn about what position you might want it installed in. Are you mostly going to be using it with a phone? A desktop reader? Access control devices? That can influence where you want it positioned.
- For phones, it can take some experimentation to find the best position and orientation to get good reads and writes. It also depends a lot on the phone. Installing applets to the chip takes a lot more bandwidth than reading data from the chip, and it can take multiple attempts to get some of the larger applets installed.