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Tag Archives: Classical Cryptography
Numbers Stations
The most secure form of cryptography, indeed, the only provably secure form is the One Time Pad.
Pedantically the one time pad is not a single algorithm, but in general it is applying pre-agreed randomness to each letter.
The fundamental problem with the One Time Pad is the Key Distribution Problem, how do two people on [...]
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.
Paper based Enigma Machine
A nice little paper project for people who want a visual representation of Enigma.
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.
Posted in Classical Cryptography, Crypto Links Also tagged Cryptography, Cryptography Links, Enigma, World War 2 1 Comment
Poker By Phone
Is it possible to play poker by post or email?
Yes, if we assume that there is a trusted ‘know all’ dealer who tells each player their cards. However, is it popssible without such a trusted person.
Let’s summarise the problem. First we must shuffle the cards. Then the cards must be dealt, and no player must [...]
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.
The solution to the worked example
Over the past few days we have been looking at how we might solve:
VKMHG QFVMO IJOII OHNSN IZXSS CSZEA WWEXU
LIOZB AGEKQ UHRDH IKHWE OBNSQ RVIES LISYK
BIOVF IEWEO BQXIE UUIXK EKTUH NSZIB SWJIZ
BSKFK YWSXS EIDSQ INTBD RKOZD QELUM AAAEV
MIDMD GKJXR UKTUH TSBGI EQRVF XBAYG UBTCS
XTBDR SLYKW AFHMM TYCKU JHBWV TUHRQ XYHWM
IJBXS LSXUB BAYDI OFLPO XBULU OZAHE [...]
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.
Happy Birthday, Edgar Allen Poe
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.