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Meet your new two-factor authenticator: your Commodore 64

Old Vintage Computing Research · published 13 November 2022

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blogger.googleusercontent.com
https://crypto.stackexchange.com/questions/61501/could-a-6502-cpu-safely-compute-a-sha-1-hash-in-a-reasonable-length-of-time
crypto.stackexchange.com
http://commodore128.mirkosoft.sk/miscellaneous.html
commodore128.mirkosoft.sk
https://www.rfc-editor.org/rfc/rfc6238
rfc-editor.org
https://en.wikipedia.org/wiki/SHA-1
en.wikipedia.org
https://en.wikipedia.org/wiki/HMAC
en.wikipedia.org
https://www.rfc-editor.org/rfc/rfc2104
rfc-editor.org
https://vice-emu.sourceforge.io/vice_4.html
vice-emu.sourceforge.io
https://github.com/classilla/totp-c64/releases
github.com
https://github.com/classilla/totp-c64
github.com
https://opensource.org/licenses/BSD-3-Clause
opensource.org
https://github.com/classilla/totp-c64/blob/main/main.bas
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https://github.com/classilla/totp-c64/blob/main/sha1.xa
github.com
https://github.com/classilla/totp-c64/blob/main/time.xa
github.com
https://github.com/classilla/totp-c64/blob/main/totp.xa
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https://imapenguin.com/finding-hash-collisions/
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https://bumbershootsoft.wordpress.com/2019/04/24/implementing-sha-256-on-the-6502/
bumbershootsoft.wordpress.com
https://csdb.dk/release/?id=132056
csdb.dk
https://github.com/hobnobber/cc65sha1
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https://knowyourmeme.com/photos/1311608-arrested-development
knowyourmeme.com
https://en.wikipedia.org/wiki/Avalanche_effect
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https://github.com/classilla/totp-c64/blob/main/model/simuhmac.pl
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https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgcMgLKNFwTIF5Vio5MuzijRQ9I2Df4nyuNzFIoAUcroQl0HYDNj3vHZnyvnh8Mb1ZCJaoUywm03Soec1_aht_avw-aS5aGY2lH293m35Zrx97F9nKuzJ0DlzVI7syjeuaBEcibbzj4uxUKFqJI8NsLlheLVPJN7F-UtAtVIt2N4saWvTEuwCEfZLHn/s4080/IMG_20221006_205823.jpg
blogger.googleusercontent.com
https://github.com/classilla/totp-c64/blob/0.5-fixed-dammit/sha1.xa
github.com
http://www.floodgap.com/retrotech/xa/
floodgap.com
https://linux.die.net/man/3/timegm
linux.die.net
https://metacpan.org/dist/Time-Local/source/lib/Time/Local.pm
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https://github.com/classilla/totp-c64/blob/0.5-fixed-dammit/main.bas
github.com
https://github.com/classilla/totp-c64/blob/0.5-fixed-dammit/time.xa
github.com
https://github.com/classilla/totp-c64/blob/0.5-fixed-dammit/totp.xa
github.com
https://www.rfc-editor.org/rfc/rfc4226
rfc-editor.org
http://www.6502.org/tutorials/decimal_mode.html
6502.org
http://www.6502.org/source/integers/hex2dec-more.htm
6502.org
http://www.6502.org/source/integers/hex2dec.htm
6502.org
https://en.wikipedia.org/wiki/Double_dabble
en.wikipedia.org
https://github.com/classilla/totp-c64/blob/main/lock.spr
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https://codebase64.org/doku.php?id=base:efficient_tod_initialisation
codebase64.org
http://a1bert.kapsi.fi/Dev/pucrunch/
a1bert.kapsi.fi