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Welcome to Online Security the place for internet and computer security, privacy and anonymity.
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Cryptography Endwall 05/12/2018 (Sat) 20:26:54 [Preview] No. 1211
In this thread we will discuss cryptography, cryptosystems, crypt-analysis, and tools for cryptography such as gpg and other tools. If you work in this field or hear of some relevant news about this field feel free to contribute. Use hyperlinks and source citations to back up any claims made if necessary.


Endwall 05/12/2018 (Sat) 20:33:48 [Preview] No.1212 del
Some introductory questions:

1) What are some good books on this subject both mathematical and practical?

2) What are some good methods to defeat crypt-analysis like frequency analysis to include when doing standard encryption methods like RSA using gpg? Would padding the plain text message before encryption with arbitrary random ASCII on both ends help or hinder this process?

3) Why is the trend for modern crypto to move away from using prime numbers towards elliptic curves? Speed? Security? Lower computation time?

Feel free to ask your own questions or to answer any that you see if you are knowledgeable on the subject field.


Endwall 05/13/2018 (Sun) 07:18:05 [Preview] No.1213 del
>>1212
2)
I'm suggesting to pad your messages with passgen.sh as I think that it might be helpful.

$ passgen >> message.txt
$ nano message.txt

/BwZ1X7Xe3YgJhlWtxjmjweodhiKm5Dg2mkuyEyTRTQCFL2AajWTTxGl2TW1/tSztDoz2Ci0YveM

This is the message. Have a nice day!

^X

$ passgen >> message.txt

$ gpg --list-keys | more
$ gpg -e -a -r Endwall message.txt
$ cat message.txt.asc
$ gpg -d message.txt.asc

Seems to work. Maybe pad it twice on either end. That should mess with the crypt-analysis. Just an idea.


Endwall 05/13/2018 (Sun) 07:24:32 [Preview] No.1214 del
Of course do this on your air gap and shuttle the messages and replies by floppy disk to your transmission workstation. Do encryption and decryption on an air-gap, and move the messages by floppy disk message sneaker net FDMSN . That should mess them up really good. If they can still get to your messages after that then re-evaluate the trustworthiness of the counter-party correspondent.


Endwall 05/13/2018 (Sun) 07:25:53 [Preview] No.1215 del
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/BwZ1X7Xe3YgJhlWtxjmjweodhiKm5Dg2mkuyEyTRTQCFL2AajWTTxGl2TW1/tSztDoz2Ci0YveM

This is the message

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XpRX446eEThe8WQpP0ShgNfDfQw1ZISSWoRivxNMJYX5Px0K


Endwall 05/13/2018 (Sun) 07:29:29 [Preview] No.1216 del
>>1215
Why stop there? Pad every paragraph!!



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