Seos
HID's current flagship credential — standards-based AES, carried in an SIO, and the same thing whether it's a card, a fob or the key in your phone.
Seos is HID's modern credential technology, and the one it actually steers customers toward today. It's the clean break from legacy iCLASS: standards-based cryptography instead of a secret in-house cipher, and a credential that isn't tied to a particular card. It's also the technology behind HID's mobile and wallet keys, so the Seos on a plastic card and the Seos in your phone are the same credential in different bodies.
#What makes it different
- Published crypto, not a proprietary one. Seos is built on AES and open, documented standards — the opposite of the "secret algorithm" approach that sank older cards. The design is meant to be inspected, not hidden.
- Modern crypto — but mind the keys. Here's the catch the marketing skips: a stock Seos deployment runs on HID's standard key set, shared with every other standard Seos site. It's AES and it hasn't been publicly pulled apart the way legacy iCLASS's key was, but a shared key is a shared key. Site-specific security comes from moving to custom keys, which HID offers — as an opt-in, not the default.
- It carries an SIO. Like iCLASS SR and SE, a Seos credential is a Secure Identity Object — signed, bound, and portable across form factors.
#Form-factor independent
Because the credential is the SIO, Seos doesn't much care what it rides on: a card, a fob, a sticker, a phone, a watch. That's what lets HID issue the same Seos credential as a plastic badge today and a phone key tomorrow, over the air, without touching the door. The reader is checking the SIO, not the plastic.
#Where you'll meet it
Newer HID deployments: office and campus badges on Signo and multiCLASS SE readers, and increasingly the employee badge in Apple Wallet or Google Wallet, which is a Seos credential provisioned to the phone. If your building moved off legacy iCLASS or Prox in the last several years, there's a good chance it landed here.
With Your phone
If your office badge is in your wallet, it's doing card emulation of a Seos credential. You can't read the SIO out — that's rather the point — but you can watch the tap work the same as a plastic badge.
With Flipper Zero
Plain NFC won't touch a Seos credential. The Seader app can read a Seos-compatible card using an external SAM (secure access module) to handle the authentication — on your own credential.