YubiKey 5Ci
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Pickup available at SIAMBC Bangkok (Mon-Sat 9:00-17:00)
Usually ready in 1 hour100% genuine stock from authorized channels
Free express shipping nationwide, delivered in 1-2 days
Arrives faulty, we replace it straight away
Pairs well with
The YubiKey 5Ci is a hardware security key from Yubico. It replaces one-time codes sent by SMS or generated in an authenticator app with a physical key that remains in your possession. An attacker who does not hold the key cannot complete the sign-in, which makes it resistant to phishing.
Connection
- USB-C and Lightning
What it supports
This is a YubiKey 5 Series key, which supports Yubico's full range of protocols. In addition to passkey sign-in, it supports certificate-based smart card login, OpenPGP email signing and encryption, SSH authentication, and OATH-TOTP codes through Yubico Authenticator.
- FIDO2/WebAuthn
- FIDO U2F
- Smart card (PIV)
- OpenPGP
- Yubico OTP
- OATH-TOTP
- OATH-HOTP
- Challenge-Response
- Secure Static Password
Build
- Glass-fiber reinforced plastic
- IP68 rated for water and dust resistance, and crush resistant
- No batteries and no moving parts: no charging required and no mechanical wear
- 12 x 40.3 x 5 mm, 2.9 g
- Rated for more than 100,000 insertion cycles; MTBF of more than 100 years
- Manufactured in Sweden
Compatibility
Compatible with Windows, macOS, ChromeOS, and Linux over USB-C, and with iPhone and iPad models that have a Lightning port.
Frequently asked questions
What happens if I lose the key?
That method of sign-in is no longer available to you, which is why Yubico recommends registering two keys with every account and storing the backup key in a secure place. For this reason, we recommend purchasing two keys.
Does it require charging?
No. The key has no battery and no moving parts; it draws power from the port into which it is inserted.
Is it the same as a hardware wallet?
No. A security key protects your account sign-ins. A hardware wallet protects your digital assets. The two are often used together.
How does it differ from the Security Key Series?
The Security Key Series supports FIDO protocols only and is offered at a lower price. This key adds smart card (PIV), OpenPGP, Yubico OTP, and OATH support.
Buying from SIAMBC
SIAMBC is an authorized Yubico reseller in Thailand, listed on Yubico's reseller locator, with a showroom in Bangkok. Every unit is new and sealed. Support is available in Thai and English.
Register your warranty online Register ›
Shipping information
Processing:
- Orders are processed and dispatched the same day.
Delivery:
- Free shipping nationwide. Estimated delivery 1-2 business days, faster in Bangkok.
- Same-day delivery in Bangkok by Grab or LINEMAN. Call or message us on LINE to arrange it and pay by bank transfer.
- Or collect from our Bangkok store, Monday to Saturday, 9:00 AM to 5:00 PM.
Tracking:
- Once your order ships you will receive a confirmation email with a tracking number.
Return and Exchange Policy
Faulty on arrival: if a device arrives defective — a broken screen, a connectivity fault — we replace it with a new one straight away. No forms, no waiting on the manufacturer.
Warranty: YubiKey and Security Key products carry a 1-year warranty, and claims are handled by us rather than an overseas support queue.
Change of mind or wrong model: we do not accept returns or give refunds, whether or not the box has been opened. We accept returns for defective products only, which we exchange within 30 days of delivery. This is a security limitation of these devices: once a device has left us, we cannot assure the next customer that it has not been interfered with.
How to arrange an exchange for a faulty item
- Message us on LINE at @siambc or email order@siambc.com before sending anything back.
- Include your order number, what is wrong, and a photo or short video.
- Send the item back to us at your own shipping cost. Once we have checked it, we exchange it.
Refunds: faulty items are exchanged rather than refunded.
YubiKey 5Ci
Package contents
YubiKey 5CiThe key only; no cable or accessories
Sealed Yubico retail packagingThe back of the pack directs you to yubico.com/start
Specifications
Connectivity
- Connector
- USB-C and Lightning
- NFC
- No
Supported protocols
- FIDO2/WebAuthn (passkeys)
- Yes; stores 25 or 100 passkeys, depending on the firmware version
- FIDO U2F
- Yes
- Smart card (PIV)
- Yes; stores up to 24 certificates
- OpenPGP
- Yes; for email signing and encryption, and for SSH
- One-time passcodes (OATH)
- OATH-TOTP and OATH-HOTP for up to 64 accounts, through the Yubico Authenticator app
- Yubico OTP
- Two slots, also configurable for challenge-response or a static password
Security
- Secure element
- Built-in secure element
- User presence
- Touch required at each sign-in
- FIDO2 PIN
- No default; user-defined, 4 to 63 characters
- Incorrect PIN entries
- FIDO2 locks after 8 incorrect entries; the required reset deletes all passkeys on the key
- PIV PIN
- Default PIN 123456 and PUK 12345678; change both before use
- Firmware
- Installed at the factory; cannot be updated
Size and durability
- Dimensions
- 12 × 40.3 × 5 mm
- Weight
- 2.9 g
- Material
- Glass-fiber reinforced plastic
- Water and dust resistance
- IP68
- Crush resistance
- Up to 25 N·m
- Battery
- None; no charging required and no moving parts
- Insertion cycles
- More than 100,000
- Mean time between failures (MTBF)
- More than 100 years
- Made in
- Sweden
- Serial number
- Printed on the back of the key
Compatibility
- Computer
- Windows, macOS, ChromeOS, Linux
- Phone
- iPhone and iPad models with a Lightning port
- App
- Yubico Authenticator, for OTP codes and key management
Temperature
- Operating
- 0 to 40°C
- Storage
- -20 to 85°C
Select a label on the image to view the related specifications
Which Yubico key is right for you?
YubiKey 5C NFC
2,690 ฿USB-C and NFC with the full YubiKey 5 Series feature set. Connects to computers by USB-C and to NFC-enabled phones by tap.
View YubiKey 5C NFCYubiKey 5C
2,590 ฿USB-C with the full YubiKey 5 Series feature set, compact enough for a key ring. No NFC.
View YubiKey 5CYubiKey 5C Nano
3,090 ฿Nano-sized USB-C key designed to remain in a computer port. No NFC.
View YubiKey 5C Nano- Currently viewing
YubiKey 5Ci
3,490 ฿USB-C and Lightning connectors on a single key, for iPhone and iPad models with a Lightning port.
Security Key C NFC by Yubico
1,790 ฿USB-C and NFC, FIDO2 and FIDO U2F only. The most affordable option, sufficient for everyday website and app sign-in.
View Security Key C NFC by Yubico
| YubiKey 5Ci | YubiKey 5C | |
|---|---|---|
| Price | 3,490 ฿ | 2,590 ฿ |
| Connector | USB-C and Lightning | USB-C |
| NFC | No | No |
| Smart card (PIV) and OpenPGP | Yes | Yes |
| OTP codes in Yubico Authenticator | Yes | Yes |
| FIDO2/WebAuthn (passkeys) | Yes | Yes |
| Dimensions | 12 × 40.3 × 5 mm | 12.5 × 29.5 × 5 mm |
| Weight | 2.9 g | 2 g |
How to verify that your key is genuine
- The packaging must be fully sealedThe clear plastic packaging must be fully sealed, with no tears, cuts, or signs of having been opened and resealed. If it is damaged, do not use the key; contact us immediately.
- The package contains only the keyThe package contains no cable, PIN card, or code sheet. If anyone provides a PIN or code with the key, do not use the key.
- The key must show no signs of tamperingInspect the edges, seams, and connector for pry marks, adhesive residue, or loose parts. If you find any, do not use the key; contact us immediately.
- A serial number is printed on the backThe back of the key carries a printed serial number and a 2D barcode.
- Verify the key with YubicoEnter yubico.com/genuine in your browser yourself, insert the key, click Verify device, and allow the browser to read the device's make and model. The page reports whether the device is a genuine Yubico product.
- There is no need to open the keyAll of the checks above can be performed without opening the key. Opening the key can damage it and void the warranty.
YubiKey 5Ci FAQ
How much is the YubiKey 5Ci?
3,490 ฿ at SIAMBC, an authorized Yubico reseller in Thailand.
Does it work with iPhone?
Yes. Insert the Lightning connector into an iPhone or iPad with a Lightning port, and use the USB-C connector with a computer.
What is the default PIN?
FIDO2 has no default PIN; you set one the first time a website or app requests it. The smart card (PIV) application ships with the default PIN 123456 and PUK 12345678, which should be changed before use. How to set and reset the PIN
What happens if I forget the PIN or enter it incorrectly?
After 8 incorrect FIDO2 PIN entries, FIDO2 locks. It must then be reset, which deletes all passkeys on the key, and set up again. How to set and reset the PIN
How does it differ from the Security Key Series?
The YubiKey 5 Series adds smart card (PIV), OpenPGP, and OTP codes. Security Key Series keys support FIDO2 and FIDO U2F only, at a lower price. If you sign in to websites only with passkeys or security keys, a Security Key Series key is sufficient.
How many keys should I purchase?
At least two. Register both keys with every account and store the backup key in a secure place, so that you can still sign in if the primary key is lost.
Is it water resistant, and does it require charging?
It is rated IP68 for water and dust resistance. It has no battery and requires no charging; it draws power from the port or, when tapped, from NFC.
Can the firmware be updated?
No. The firmware is installed at the factory and cannot be updated, so the available features depend on the firmware version the key ships with.
Will SIAMBC and Yubico ask for your PIN or for remote access to your device?
No. Neither will ever do so. Anyone who requests your key's PIN or account recovery codes, asks you to send them the key, or requests remote access to your computer or phone is attempting fraud, whether the person claims to be SIAMBC staff, uses Yubico's name, or cites a warranty claim.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Free shipping nationwide. Orders normally arrive within 1 to 2 business days, faster if you are in Bangkok.
Need it today? We can send by Grab or LINEMAN for same-day delivery in Bangkok. Call or message us on LINE to arrange it and pay by bank transfer.
You can also collect from our Bangkok store.
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Customer Support
We answer in Thai and English, usually within a few hours on weekdays.
You set it up yourself: register the key with your accounts from the security settings of each website or app you use. SIAMBC will never ask for your key's PIN or your account recovery codes. How to set and reset the PIN.
Stuck on a step? Ask us on LINE or at the shop.
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Common questions
Which model should I choose? Go by the ports on your devices: USB-A, USB-C, or a model with both USB-C and Lightning. For tapping on a phone, choose a model with NFC. A Nano is made to stay in the port. The YubiKey 5 Series supports FIDO2, OTP, PIV, OpenPGP and OATH, the Security Key Series is FIDO only, and YubiKey Bio adds a fingerprint reader. See every security key.
Are your products genuine? Yes — new, sealed, genuine stock from authorized channels, from a physical shop in Bangkok you can walk into.
Will SIAMBC or Yubico ever ask for my key's PIN? Never, neither of us. SIAMBC and Yubico will never ask for your key's PIN, ask for remote access to your computer, or contact you asking you to send them the key. Anyone who does is a scammer.
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Contact Us
LINE is the fastest way to reach us — and how most of our customers ask questions before buying.
Phone: +66 82 554 6950
Email: order@siambc.com110/2 Thawi Watthana-Kanchanaphisek 3 Rd, Bangkok 10170
Monday to Saturday, 9:00 AM to 5:00 PM
Fast & Free shipping ส่งฟรี ส่งเร็ว
Before you buy
Are your products genuine?
Yes. Every product we sell is new, sealed, genuine stock from authorized channels. SIAMBC has sold security devices in Thailand for more than 10 years and has a physical store in Bangkok you can walk into.
You can also check a key yourself: type yubico.com/genuine into your browser, insert the key and click Verify device. The page tells you whether it is a genuine Yubico device.
How long does delivery take?
Orders normally arrive within 1 to 2 business days, depending on where you are — faster if you are in Bangkok.
Need it today? We can send it by Grab or LINEMAN for same-day delivery. Call us or message us on LINE to arrange it, pay by bank transfer, and it goes out immediately.
You are also welcome to collect from our Bangkok store.
Can I collect from your store instead?
Yes. We are in Thawi Watthana, Bangkok, open Monday to Saturday, 9:00 AM to 5:00 PM. You are welcome to come in, see the devices in person and ask questions before you buy. We answer in Thai and English. Find us here.
What warranty do I get?
YubiKey and Security Key products carry a 1-year warranty, claimed directly through SIAMBC, with no waiting in an overseas support queue.
If a key is faulty out of the package, we replace it with a new one straight away. No forms, no waiting on the manufacturer.
How can I pay?
Credit card, bank transfer, or cash on delivery. You can also pay in person at our Bangkok store.
Can I set it up myself?
Yes, and you should. It takes a few minutes: open the security settings of the account you want to protect, choose to add a security key or passkey, then insert or tap the key as the screen asks. Register a second key as a backup too.
FIDO2 has no default PIN; you set one the first time a website or app asks. How to set and reset the PIN. If you get stuck, our team can answer on LINE or by phone, without ever asking for your key's PIN or your account recovery codes.
Which model should I choose?
Go by the ports on your devices: USB-A, USB-C, or a model with both USB-C and Lightning. For tapping on a phone, choose a model with NFC. A Nano is made to stay in the port.
The YubiKey 5 Series supports FIDO2, OTP, PIV, OpenPGP and OATH, the Security Key Series is FIDO only, and YubiKey Bio adds a fingerprint reader. See every security key, or ask us. We will tell you honestly which one fits.
What happens if I lose my key?
If you registered a backup key with every account, you can still sign in with the backup, then remove the lost key from each account's security settings. That is why we recommend at least two keys.
Without a backup key, you need the account recovery codes each website or app gave you during setup. Keep those codes somewhere safe and never share them.
Will SIAMBC or Yubico ever ask for my key's PIN?
Never, neither of us, for any reason. SIAMBC and Yubico will never ask for your key's PIN, ask for remote access to your computer, or contact you asking you to send them the key. Anyone who does, whether they claim to be SIAMBC staff, use the Yubico name or say it is for a warranty claim, is a scammer.
Security Key Guides
How to Set Up and Use YubiKey 5 NFC
How to Set Up and Use YubiKey 5C NFC
How to Set Up and Use YubiKey 5C
