It looks like you're using an Ad Blocker.

Thank you.

Some features of ATS will be disabled while you continue to use an ad-blocker.

# Encryption/decryption

page: 2
1
share:

posted on Oct, 5 2011 @ 10:20 PM

Originally posted by Taz2122
He claims that encryption doesn't really work since the one (or they) who came up with the specific encryption standard would know how to decipher it since they programmed it.

I'll give you a simple 1 bit encryption example using the "square root" function that you can show your friend.

The square of +3 is 9.
The square root of 9 is 3.
BUT
the the square of -3 is also 9.
Both negative 3 and positive 3 give the same answer = 9.

So now, imagine an encrypted file, containing one byte. This byte is "9".
The question is... what is the UNencrypted number?

So if you had to "decrypt" the number 9 to gain access to the secret files, you still have (by trial and error) to try both negative 3 and positive 3.

Sure, thats only a simple 1-bit encryption, but even though I've told you how it works, and even if you tell your friend how it works, neither of you can still instantly solve it.

Imagine now a more complex version of this, with 128 different examples of the above "lock" for you to try.

-----------------

Note of course that this is a hideously simplistic example, but hopefully it illustrates the point that knowing how the encrption system works doesnt just give the programmer instant access to the decrypted code.

posted on Oct, 5 2011 @ 10:30 PM

Originally posted by Taz2122
He claims that encryption doesn't really work since the one (or they) who came up with the specific encryption standard would know how to decipher it since they programmed it.

Second example.

X multiplied by Y = Z.
This specific encryption standard sounds simple enough, but...

Consider the two prime numbers 7901 and 7919 (prime numbers are ones that you can divide by no other numbers than one and themselves). Suppose you multiply them together to get 62568019. That's a pretty simple operation anyone can do in two seconds flat with a calculator.
But what if I give you the number 62568019 and tell you to figure out the two numbers I multiplied together to make that number. You'd be there all day!

www.explainthatstuff.com...

-----------------

Note of course that this is a hideously simplistic example, but hopefully it illustrates the point that knowing how the encrption system works doesnt just give the programmer instant access to the decrypted code.

posted on Oct, 6 2011 @ 05:36 AM

Originally posted by Spiramirabilis

what I was initially wondering was - is this something that can be used for more nefarious purposes? Trojan horses - key-loggers? Having been on the receiving end of this sort of thing - and not really understanding how all this works - I was reading through the thread and several people mentioned creating backdoors - kinda got me thinking

Simple still 'Stegano'd'' pictures are generally safe because you need the appropriate software running to process it to extract the embedded data. But let's suppose that software is quietly installed via a trojan attached to some 'free software offer' or irc exploit etc and auto-executing (silently) whenever you open a jpg or bmp file - any sort of malware could be delivered to you in pictures of funny cats or whatever and installed/executed when you open that picture without your knowledge (could be a virus or keylogger or anything at all). There's a never-ending supply of creative (but misguided) individuals out there working on such ways of disrupting the online society.

Re-sizing the pic or changing the format of it would effectively squash any hidden payload but don't get paranoid about it, just keep your AV software up to date and do regular backups plus remain cautious about what you download.

posted on Oct, 6 2011 @ 12:20 PM

I have a Mac :-)

and, as everybody knows...we are completely invulnerable

many of the happy, chirpy Mac creatures living inside Appleland will tell - and have told me:

don't worry you're fluffy little head about any of this - nothing bad can ever happen on a mac :-)

thanks again Pilgrum

posted on Feb, 23 2012 @ 03:44 AM
will someone please try to decrypt this?

UfsXz23zAx2vsTLVQjKIV38rQ3hRyus/l3FGd+b7P/EtL3ByvYwd6S/g7+kO8oUy+Q/9JPb8myIA
CXPqi2ismH6uwuQ8YlcpFi0gcJKaRfwSLaVb11EmCKmlm9PME6fO1J92eZhv3ixhSjGdMnNxFExu
WJZK0Sp7VnYYpebnD1kwl4jm/vsaQCEOniDQIupckgLuAvbTnckiyqIjRPz9tiqw7uxUkOChaw8Z
81p6om0cwAkQWJgmbqseVeuA7FWmAgVIXA60yQA1wqWSMHTzTp3VCV+uagpss33aAczS3XzO4VN6
dh25iqyNpeXh5x1QJXWPhs65uaiDP6CQwREXkEGrronGSLHPHtMk5bwcVSi5KYl0PXWYb9t4pBXH
8an4lBzALptmkYZ7JoEbeQiPpZPhuOvjKcC720YLuWtJi63HP48tm3qHBZRZIFLYSWLkmA/uFO/F
JmhUY5KFrpVyAHm3NDKPoJvCwliCvp1cSKgDUoBBcOyN1c8EIIHTVUIruryrd5S1IMXD1aX6untf
9YcFDvux55TFOKkSijhIr7PMiX0cWI2Wwo6AKMlrfuDM0mp2GQLDl1ge6sLSzyR99djrL46fjwWU
a8coDMierDNjYAxoV/9cn+kScAA4674dnpJTsDN7jFT21n2gJavzljClZJukN41a6Zagx3oxz0Mr
tuh/0qoIxeF2eKwFt6fXzzaKCaz9NpkUV3an3VbTjQlbKEn3EeTae39H9txgLxoJbwPB1qIz51Wl
+oaliFSvRdIs15ipmVfwYi3LuEOf2xAa8w5uMqRQlCLjv80mZ5ec0wtifg+JldupKTTGlKBZKLGC
jii754rkPDLB6/NkS2bv1YuGdxJ0NkBULKfHAJ/tI+gwgNt43BqXalO16ggrPPp4o7wOXjeUwS/4
N/vpuJwWf9rirU+2HN02o1fh7IYq/vfGSz+6TaYk8qWpOD8n8QoYU0AY/ortXlgIrLFWhJJ3jcLr
h8MhELG74Zv8ZfOLqA/PMQHoYG7LyrBoMtGLB2UOkEAEiLlh5/D9hIFgl2Yu90uAGULCHv1aaGqF
Zv5JF+YviVmLHyRGDfTL7J0zN/bHrMVwzuD8Xc76s3pwFPAc5G7m2XnTi7sw6mChsZc6vWXgcyjx
/uTA/998cfM5701Ok2MCLhB+i9WaL+szpip02dyFL3f1cK3wczyFtAYgO30D1XWUSVZ4KMWkpgum
XYofT9RUf2fNaJ1W/Kp8y18OTq+t9VDCKgvXsX4X07c8y+++Gf2lH0cF21f22UBzw4MsQXSp3qUL
LG9++UwdTQQN7yM6gLrazpXxJ4gArp6FgssUAiJdkeJRDysG7tIrlaKXYcvEvfhX8Qs3RXTz4ZYH
IEGdz6skDPYyxth/Y37eYrMPGSrvazi8kRmPI58rO+yGu2dc2FaXS3J8qqIu2XjZW5eMbtdpTgIw
zGNQNdCuWH0gaFSLgf+pKCS4k8sJde1/U/iHRbojyoALPLfWYbMbRLkSsWaieJDiW7OmbW6jJIu2
/ndFXWxjgcut+/+ThMvmQ3hEq6BBC7O9OJBFkdUxZ4lg5lZTXiT1p/sp1oX9DtnX1ZXTydsDasd1
Co8m9bFEqkmETrnBx9qV0WH8wn/YdJ3GTPtcAKDORpNDCIZnw1YKVVfz+HlxCQ7JKAIec/zkFsiX
KgmnSYjcEDQh+mFA5b+Krhwc4xSUaWZc0YoXWh77oGmOARhJJkvhq0fteam7R2IEt01it9BYVITK
yDKtAUCSnyGFoarWd3MbbOgUGI1jxBSa4TjJfUe2eHmv3l9fEZHNe3t5wtd+Z7eupF87AWVDUNxm
I2WpOgjL9P65UhOTk/olN+QtngASZITN1iBkjaJ8QNbZsVuY4oOX+ykQ/7xiNh1uFnxLdxbkRgAH
ll4tMBFFvJ9THZBmN1V+8qskTdAh+0NZTVGaL0RPiiRdIDB3DjlY3u+gvOzu41OU00MdWhjerRcO
wITn1kpjzs9gHQAAFa1vVdKKfDfkREBhVY8vjR2rQrT2yaTBG90dNIEevPQZVC6NvkwoDiCT3nqQ
f6OthxZGZ4n8rWCFrFiUBPQC1CRgJGDRNdh7gbYP6Nfe5etHzwHby5Or9fKT3pY2pabBNrasZmvn
g2EBw8yET7Istkbhs6wqpQVsky1Hg53y53J6BC9/N6eWoMtgmavtixFQh54q7XdwxK6bbyYEkWFh
YhhUeUP3o7PEVl1Sskpb1mdXY1a+xiIUlzuU3i4Uxa/puBEuRsVsRDZpAog41w5zYIM6LvIIgzpI
mqCHxu8tY8X4COVT7TJqlqhJUesCTQYU/u/fgTkjANSXJFJmU28WJEK6JbGSHhzD/Sz/LtvFeuOw
1oWVUnUOpLdjuhKJcFDnCdLEGcBiJgclKkYx7otQNoRJQxBR0pPcmStjGS7VIi3YOOz8iqPu5DdL
xaX7GZyAyaVj02bJPMGKNyso9pPLVbagS317Scv2grrdRt0tzldDyOZkefx0XFfSvwPp79alBT+T
RoSLp5JTihHnQAzJgfixoEn6ekojCboz1nbSO19yPupxiQ3DXs+bxKoXWG6pkxIRtQQpoui+qJMr
wFyXB0RBH+Gz6UkC0J9T47j4eAyNlbuXT9wybAGA0CQZ0WREDWqu8BK6fm8lM1k31Rizc1pVWx7X
3dth7EVJbfRSXFEN9tOWAA4gyEr6OU89bjZ2vrl/H7chTjkrK2Vgeg6gS1IV3b+eBgc2EoKlV//B
2XhWOddldAjXBoBElg0Xkw0wuTHLcjXvIeu6dIf5DcYKwxkZbTClgNG2aKVnkE/e34znOUdXO9bF
6GPu5lXSTCrz1r74smDfVp8TruwWzf4oUhmPSvWrs9z8AmxtwUgTrTghJDi4xEkUmBhOaTJP8dCZ
vkFuGJnCJL5D6u7Td4OR7RnYKB6pQy3a1C/rdHIpOox/Tob+jajE1XcBL4ieDlA3i7BEjB67TwX8
jr6wJg6q+XsY/aKHLcrv5ttG75ALib2sA/+wLu3wodSy6gfqbt6gff+Lh7jnSnyLYuyrjFgUPs4n
GZ/tvo0TWTXimZmBR/BUccOKidqKe+P9egXonam26+YCuAEtQviXJr/CTjd8IWroyLyrE5Dd6EPb
2qUdK59n1rY5sdBZsXzfbNsp90zWgB46fDtoazGcZsita03h8Szup8Wlk9mgSB83wuMtHG4DyfzI
I87DNoa/vFGDPIwtd+hA4MzS7Fs7DILtZ7yKqKL3/1rJ6T/2BV1CyThAewtHOYS4uY0DrIfxidZc
Aa10M1YEz4m9ReAz5YWsi1TqLQhVbz7Sa6psPBardzuCrY4KfaHzJ5NNUIgI7CP6H5erFuh2+Qjl
BYLnSCf8KL2IZClqNLpKh7iFBJi82NYCnq3znpTL8RK1wJsFwnoaceYMRbK0caKUH4YyK4E+MIcq
Hi7Cm/6txdQnbNz8l1w96ZWmr09zqzbNnx8zuYK5KTGBXF7nKQEi0lhhrxKb8mNQH4izXSWq/xpz
307pb0gNIxzaO73U4SCXbW0OhrEISyynO8hPq40SsMxGufG/L8CPbYzm5ApEoE6thBc7ieO368cB
sgI4JvIjpx9IjX6pqvwN40uE32qleehF559b7R2lbb6L0vw5RjcPMyIjHIW26zBndSCEDMekupf7
iktmOi/XCwRspO65JGT6zZ+5jXIaJ7ZOOZX6OHPup8jMvNyv6YrPLwy2wSHCEWEyLy3L/7a+ZEXy
Xgpl1N+B3d4Am8PMIOnq2tBGVTCXWHR6nxtjz+ODS3v0LMjAf8T21iMIYCivzq8zDOytRnYJ0or9
VAX7vHr+/cKK5kfGs85GzcY4rb+AbD+HhNxfZbJyJSBCydpulBX/gyhRljwyonoNbwvhCCEm3nn8
KDrjIG6en2i1ibWxaf60J3Vfs9chggmwt1YmyqCQ64LybNbOKA2sXx2sU5VExIsUDf4S9VRtDICq
KxewHmBvgJu7rNsG99Vv23aEL527ED4d3NquRI1yepeMAih5jVaR3n8enUODx8YfRPBqnSedudjL
5wzYGEu/eq5V5bVywe16aO08DPEV75Lff6T6PQJW45XcW6hw8+utCqhEkf56Vs6neOo7Pe/ztNyd
T/nncGylKMUim5caEJfbQ9K/LKBwdFzIs3LG0zbqez1mf4Vq5gOT/vtGILoxMR8gr1P6XFgDZ3Cu
IbVPl3UE/

new topics

top topics

1