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February 1st, 2013, 05:59 PM   #11
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Re: Cryptomaniac

Quote:
Originally Posted by CRGreathouse
The suggestions above are not very good.

A good code for this level of security would be the Vigenère cipher. Basically choose a secret phrase, like WALKONTHEBEACH. For the first letter of your message, shift it forward 23 places in the alphabet (wrapping around), since W is the 23rd letter. Then shift the next letter 1 place, and so forth. When you get to the end of the phrase start over. (It will be handy to keep a chart of the alphabet shifted by 1, ..., 22 places.) This code is too strong for people to break it just to read your diary. True, the NSA could break it without difficulty, but you're presumably not trying to keep secrets from them.

A lower-level of security would be the Caesar cipher: essentially the same as the above but with a one-letter key (the Julius Caesar used "C", essentially). This would be faster and easier but not as secure.

Professional crypto is too hard to implement by hand, though in a real pinch one could use Solitaire as a passable code without a computer.
Tell me how can i write "mathmaniac" in both ways.....please.
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February 1st, 2013, 06:05 PM   #12
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Re: Cryptomaniac

How about this?

tjgmj mttpgdd tgd amx

Can you break this?

Or

ThisI think this is very simple)

1000-101-1100-1100-1111
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February 2nd, 2013, 05:38 PM   #13
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Re: Cryptomaniac

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Originally Posted by mathbalarka

2. Learn elliptic curve cryptography. This will take atleast 6 months to learn the basics and another 6 months to learn all the remaining (it took that way in my case)

Choose whatever you like but I think the #2 choice will be unnecessary since you're writing just a diary.
Can you give links related to this?
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February 2nd, 2013, 11:30 PM   #14
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Re: Cryptomaniac

Quote:
Originally Posted by mathmaniac
Can you give links related to this?
Try wikipedia! I never learned cryptography but know a lot about EC since one of my interests lies in BSwD conjecture
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February 3rd, 2013, 07:28 AM   #15
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Re: Cryptomaniac

Fair warning: elliptic curve cryptography is much too time-consuming to use for a handwritten journal.
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February 3rd, 2013, 08:31 AM   #16
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Re: Cryptomaniac

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Originally Posted by CRGreathouse
Fair warning: elliptic curve cryptography is much too time-consuming to use for a handwritten journal.
I know,I have seen the movie "A Beautiful Mind".May be you could also watch it,very inspiring .
I just wanna study,that's all.
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February 3rd, 2013, 10:02 PM   #17
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Re: Cryptomaniac

Quote:
Originally Posted by mathmaniac
I know,I have seen the movie "A Beautiful Mind".
That's a nice movie! It's about the life of John Nash.

Quote:
Originally Posted by mathmaniac
I just wanna study,that's all.
You might want to study a little group theory (Lagrange's theorem would be enough for a good start on the basicis) before learning about ECs.

Plus, a little knowledge on fields and quotients would be awesome!
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February 6th, 2013, 05:26 PM   #18
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Re: Cryptomaniac

Quote:
Originally Posted by mathmaniac
How about this?

tjgmj mttpgdd tgd amx

Can you break this?

Or

ThisI think this is very simple)

1000-101-1100-1100-1111
Nobody can break these?
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February 8th, 2013, 07:09 PM   #19
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Re: Cryptomaniac

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Originally Posted by chocolatesheep
Great vid....
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February 8th, 2013, 07:10 PM   #20
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Re: Cryptomaniac

Anyone please reply....
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