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crazylion lee

YubiKey 4 and YubiKey 4 Nano | U2F, OTP, PIV | Yubico - 0 views

www.yubico.com/...yubikey4

key lock hardware

shared by crazylion lee on 26 Apr 16 - No Cached
  • crazylion lee on 26 Apr 16
     
    "The YubiKey 4 is the strong authentication bullseye the industry has been aiming at for years, enabling one single key to secure an unlimited number of applications. Yubico's 4th generation YubiKey is built on high-performance secure elements. It includes the same range of one-time password and public key authentication protocols as in the YubiKey NEO, excluding NFC, but with stronger public/private keys, faster crypto operations and the world's first touch-to-sign feature. With the YubiKey 4 platform, we have further improved our manufacturing and ordering process, enabling customers to order exactly what functions they want in 500+ unit volumes, with no secrets stored at Yubico or shared with a third-party organization. The best part? An organization can securely customize 1,000 YubiKeys in less than 10 minutes. For customers who require NFC, the YubiKey NEO is our full-featured key with both contact (USB) and contactless (NFC, MIFARE) communications."
crazylion lee

FreeOTP - 0 views

freeotp.github.io

otp

shared by crazylion lee on 11 Mar 19 - No Cached
張 旭

Ask HN: What are the best practises for using SSH keys? | Hacker News - 0 views

news.ycombinator.com/item

security ssh key server

shared by 張 旭 on 14 Oct 16 - No Cached
  • Make sure you use full disk encryption and never stand up from your machine without locking it, and make sure you keep your local machine patched.
  • I'm more focused on just stealing your keys from you regardless of length
  • attacks that aren't after your keys specifically, e.g. your home directory gets stolen.
  • ...19 more annotations...
  • ED25519 is more vulnerable to quantum computation than is RSA
  • best practice to be using a hardware token
  • to use a yubikey via gpg: with this method you use your gpg subkey as an ssh key
  • sit down and spend an hour thinking about your backup and recovery strategy first
  • never share a private keys between physical devices
  • allows you to revoke a single credential if you lose (control over) that device
  • If a private key ever turns up on the wrong machine, you *know* the key and both source and destination machines have been compromised.
  • centralized management of authentication/authorization
  • I have setup a VPS, disabled passwords, and setup a key with a passphrase to gain access. At this point my greatest worry is losing this private key, as that means I can't access the server.What is a reasonable way to backup my private key?
  • a mountable disk image that's encrypted
  • a system that can update/rotate your keys across all of your servers on the fly in case one is compromised or assumed to be compromised.
  • different keys for different purposes per client device
  • fall back to password plus OTP
  • relying completely on the security of your disk, against either physical or cyber.
  • It is better to use a different passphrase for each key but it is also less convenient unless you're using a password manager (personally, I'm using KeePass)
  • - RSA is pretty standard, and generally speaking is fairly secure for key lengths >=2048. RSA-2048 is the default for ssh-keygen, and is compatible with just about everything.
  • public-key authentication has somewhat unexpected side effect of preventing MITM per this security consulting firm
  • Disable passwords and only allow keys even for root with PermitRootLogin without-password
  • You should definitely use a different passphrase for keys stored on separate computers,
  • 張 旭 on 14 Oct 16
     
    "Make sure you use full disk encryption and never stand up from your machine without locking it, and make sure you keep your local machine patched"
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