misc general
"Windows Hello" compatible YubiKey's are can be found here.
- Administrative Templates > Windows Components > Microsoft Secondary Authentification > Allow companion device for secondary authentification
- Administrative Templates > System > Logon > Turn on convenience PIN sign-in
- Set PIN in Settings > Sign-in options > PIN add
- Install "YubiKey for Windows Hello"
- Register your YubiKey in the app
- Standard: ISO/IEC 18004
- Error correction
- Series of error correction codewords which are added to the data codeword sequence.
- Levels:
L (7%)->M (15%)->Q (25%)->H (30%)- % of restorable codewords
- Modes
- Numeric (digits 0-9)
- Alphanumeric (digits 0-9; letters A-Z; space,$%*+-./:)
- “Binary“ (JIS 8-bit character set (Latinand Kana) in accordance with JIS X 0201)
- Kanji (Chinese letters; JIS X 0208)
- Quiet Zone
- “This is a region 4X wide which shall be free of all other markings, surrounding the symbol on all four sides. Its nominal reflectance value shall be equal to that of the light modules.” (recommendation from ISO 18004, X: width of a dark module)
Types (prefixes)
| Type | Tag |
|---|---|
| URL | Prefix protoclol like https:// or URLTO:google.com
|
mailto: |
|
Add more: mailto:holzkohlengrill@github.io?cc=users@gmail.com,guyCCed2@gmail.com&bcc=secretperson@gmail.com&subject=htmlencodedstring&body=htmlencodedbody
|
|
| Phone number | tel: |
| SMS |
sms: or sms:<phone-number>This:text
|
| vCard | no prefix: see here |
| iCal | no prefix: see here |
| Wifi |
WIFI:T:<WPA or WEP>;S:<network ssid>;P:<password>;;, escape (\) special chars |
| Geo location | geo:lat,long,alt |
Install (if you prefer a GUI use qtqr):
$ sudo pacman -S qrencodeqrencode always generates RAW data qr codes. In order to get certain types (phone numbers, vcards, ...) just add a prefix like:
$ qrencode -s 7 -o qrcode.png 'tel:'Oftentimes the generated QR-codes are to small. Therefore we use the size option (-s 7) with seven dots per pixel which leads to satisfying results.
james-qr.png:
$ zbarimg james-qr.png
QR-Code:BEGIN:VCARD
VERSION:2.1
N:James Bond
TEL;HOME;VOICE: 0800 789 321
EMAIL:james@sis.gov.uk
ORG:SIS
TITLE:Intelligence Officer
BDAY:19201111
ADR:85 Albert Embankment, London SE1 7TP, UK
URL:https://sis.gov.uk
END:VCARD
scanned 1 barcode symbols from 1 images in 0.33 seconds
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License *.
Code (snippets) are licensed under a MIT License *.
* Unless stated otherwise