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Category Archives: Modern Cryptography
GeoHashing
Via xkcd I learned of a new idea called ‘Geohashing‘
Essentially the idea is that based on some seed data, some complicated sums are done to give a location.
People get to that location for a meetup.
A map tool is available which does the sums for you. You set the date, click your area and it gives [...]
This post is part of a series of 47 posts which begins with The Caesar Shift, the latest post in the series is Letter Groups.
Also posted in Geeky, Maths Tagged Cryptography, GeoHashing, GPS, md5, Modern Cryptography, xkcd Leave a comment
SHA-1 Broken
SHA-1 which is key to many cryptographic protocols, e.g. PGP, SSH, and the cryptography behind shopping online has been broken.
It isn’t currently a major issue as large resources are needed, however, work will need to be done to replace the affected algorithms before improvements in technology and in the algorithms make the attack more feasible.
Additional: [...]
This post is part of a series of 47 posts which begins with The Caesar Shift, the latest post in the series is Letter Groups.
PGP
Previously I have mentioned RSA and Public Key systems as well as briefly mentioning PGP.
The most well known public key system is probably PGP. PGP was created ‘for the masses’ by Phil Zimmerman.
Good public key systems are vital in todays world to secure everything from online commerce to credit card transactions. You would not be [...]
This post is part of a series of 47 posts which begins with The Caesar Shift, the latest post in the series is Letter Groups.
Venona
‘Venona‘ was the code name for US decrypts made on Soviet traffic, some of which were encoded using a One Time Pad. The codename in the UK was ‘Bride’
If used correctly, a One Time Pad is unbreakable. The Soviets knew this, and used One Time Pads for much of their encryptions, for trade and diplomatic [...]
This post is part of a series of 47 posts which begins with The Caesar Shift, the latest post in the series is Letter Groups.
Quantum Cryptography (a background)
This post is part of a series of 47 posts which begins with The Caesar Shift, the latest post in the series is Letter Groups.