Author Topic: Use public key cryptography.  (Read 2025 times)

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Offline BritishSword

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Use public key cryptography.
« on: October 08, 2012, 01:16:29 PM »
OK
High time JTFers started safeguarding their privacy and anonymity.
  You have the right to lock your doors, you have the right to remain silent in police interviews, though G-d forbid anyone should go through that. Extend the same protection to your digital world.

A public key in case you don't know is a system where data is encrypted by what is called a public key but can only be decrypted by a npn-symmetrical corresponding private key. The public key can be made general knowledge - hence the term.
  We use public key cryptography quite often without realising it. When you see the little padlock sign on https on sites like ebay, the channel has been secured by that sites public key, thats how they exchange data.
  You can extend the benefits to email.
  It would mean that once you encrypted data with the recipients public key, then only that recipient will be able to decrypt the data...
ever.
  Would save me messing about with PMs and password swapping when I needed to send sensitive data.
  Now there are two freeware bits of software that can facilitate this which I have been kind enough to provide links for. BCarchive for data and BCtextencoder.
  They're easy to use and the BCtextencoder doesn't even need installing.
  I have a public key so I can send messages to myself at the moment, which is useless. I've no one to play with. I need someone to play with. Do not begrudge the couple of minutes it will take to generate your keypair, the payoff will be tremendous.

   OK, read the help file, make sure your key is at least 2048 bits, give your private key a strong password, at least twenty characters and put a number or symbol in somewhere where you can remember it.

If you forget the pass or lose the private key, then no one is decrypting data adressed to you...ever.

You can publish and send the public key anywhere you want, tho I recommend limiting distribution, so people know its from you and you do not send the private key (duh)
http://www.mediafire.com/?879fhy96y73fsye

http://www.mediafire.com/?4cl1ciw4i7nw6te


And my public key
http://www.mediafire.com/?mfvwl3904dt72sl

Alternately try inputting the text
The ASCII armored block contains public key.
User ID: CN=Sword

-----BEGIN X509 CERTIFICATE-----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6Ji7k4vcDYyAVmFXXf6FCEMpFygzDmrApOSuVvu2wAZWoDMU42hgqPC8s+sGtxTv
bohTTecIgsw6n3B7RLxk7kwyRqL6c+Ke67XLvowOocBK+a7InVsrOZsu/qPBY4v6
hQ9+YuHF5nqNiwiqj5kkb3hdF3EYRVR4knk2Y+s+lCd9nL8UGsOP94YQwpkkJnA8
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2XDlWscKp/BklibRj5z+WSnuthtHkO8A6RYgXe9KcvWsBPLQd+CcNHwNsqNZQLPR
ilHWJiXj2aI5uptB
-----END X509 CERTIFICATE-----


That is actually an expiring one I need to make a non expiring one.
« Last Edit: October 09, 2012, 05:55:17 AM by BritishSword »
I'm British. I'm Sharp.  I'm Deadly.
I am BritishSword

6a55022f0e321cd66b22318630573230965751cf

Offline briann

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Re: Use public key cryptography.
« Reply #1 on: October 08, 2012, 02:38:44 PM »
You are talking about email ?

Offline muman613

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Re: Use public key cryptography.
« Reply #2 on: October 08, 2012, 03:59:45 PM »
For home use there is PGP (A commercial product I believe) or the open source version GPG {Gnu Privacy Guard}

Quote
The GNU Privacy Guard

GnuPG is the GNU project's complete and free implementation of the OpenPGP standard as defined by RFC4880 . GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications. A wealth of frontend applications and libraries are available. Version 2 of GnuPG also provides support for S/MIME.

These Public Key encryption/decryption system is very secure {by industry standards} but it is believed that the supercomputers used by the government may be able to crack the keys. These keys can be used to sign and encrypt email communications, often integrated into the mail system through MIME. http://en.wikipedia.org/wiki/MIME...

Of course the encoder/decoder can be used to encrypt local files also. When dealing with a message from one GPG user to another the public keys are shared, so the message can be encrypted so only the intended recipient can decode it.



http://www.gnupg.org/

http://www.symantec.com/products-solutions/families/?fid=encryption

http://en.wikipedia.org/wiki/GNU_Privacy_Guard


I use this encryption on files which I want to keep private {such as my work source code}.

You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline muman613

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Re: Use public key cryptography.
« Reply #3 on: October 08, 2012, 04:03:32 PM »
I guess BritishSword is talking about alternative software to the PGP/GPG toolchain.

I find the existing tools adequate enough to do all my encryption. GPG is free and there are many tools which work with it.

You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline muman613

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Re: Use public key cryptography.
« Reply #4 on: October 08, 2012, 04:07:27 PM »
Here is my public key:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.10 (GNU/Linux)

mQGiBEW5MYsRBADorw0G2PXwbADFfWb9CKvHaRTZHS2cnYd99qZ2rH2y5PQJknfc
Hn4LDQFXutkfhH5fSP3wK+ZXsLoy0+Z43Ow1yuwwqSesYVP2FnAnQiZufLtJIDJu
63UPWNLX0I9E5LQyXOf38Sspxofno8zxyeEF7a5BGb+3Z//+PgF5uFlzBwCg5lrT
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r/wCnyMHmFrfYiJr2S/2LD1CFW5KfTwjhNC7+lcgJJB4Hb2pDolv6pCEAVV+/JCO
PgAeiNLWZ6c198fiNlKDI+S8Fo+ODL8o8qe4sb/nCxg0U8bpmmdrHpSIpHvP03nw
pO1rBADOGCNUiqSd2X4n9K9rfDXrOVlSbfO0GrfVl+D5KrGNe3VgC1fNAVJysxpy
TZ4XDLYznnv8aQV7ldpXybsyj+KC6uzdxpAV/qPKTpNwf9662V1g1dcWmSXKooT3
JTuSxnAwXPLgveBVt8/s0v0kJ8VRDUbzpAAskr1o/1lNUs1XnLRKTWljaGFlbCBV
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j/eOaivjhh9ot5Cc/KxX+dRn07kCDQRFuTGmEAgAoWoE9p74oPl/4MtdmRsMT41t
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eyoNROKN8BOrcdus3gCfaCwLfF+1ooBVWrsrbWKstB+4GUo=
=Mms2
-----END PGP PUBLIC KEY BLOCK-----
You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline briann

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Re: Use public key cryptography.
« Reply #5 on: October 08, 2012, 04:44:19 PM »
I personally had to use pgp for a client once for email communication.  He was extremely paranoid about corporate espionage, snooping, etc.


Offline Zelhar

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Re: Use public key cryptography.
« Reply #6 on: October 08, 2012, 05:16:54 PM »
The problem is I can't force people to encrypt emails they send me, and I can't expect them to go through the trouble of decrypting the mails I send them. Except for this two little problems which render encrypted communication all but useless, gpg is awesome.


My (new) public key:
Quote
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v2.0.19 (GNU/Linux)

mQSuBFBzP7QRDADCRMVAAZgtrsa+Y+mhqKj9IdwYINHGgTossMnrgHOtf9mpY+1Q
+18st4Q4/gZzDcUtCignIH+40JfVPSsg0sjh+ivgFuzWgrcOp+x4jPDiENHFCZ+U
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1ZSwQBnEvuw/rFfgIZxUf68AAwUP/ROpDM8j3Tu7Zpihk8c/Abzf9rrkijaN3BI4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=Cg/L
-----END PGP PUBLIC KEY BLOCK-----

Offline Zelhar

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Re: Use public key cryptography.
« Reply #7 on: October 08, 2012, 05:19:35 PM »
Muman, I don't know much about computers so I could be wrong, but wouldn't sharing your public key on the internet be a security issue?
The public key is used to encrypt data you want to send to muman, and it is meant to be distributed to everyone. The only way to decrypt the message is with the PRIVATE key which is secrete.

Offline briann

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Re: Use public key cryptography.
« Reply #8 on: October 08, 2012, 05:21:19 PM »
Muman, I don't know much about computers so I could be wrong, but wouldn't sharing your public key on the internet be a security issue?

No, thats the beauty of PGP... the public key is supposed to be public... it can ONLY be used to scramble.. not to unscrable...

Only the private key is for unscrambling....

Its quite an ingenious concept and without it... secure communication would be much more difficult.


Offline muman613

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Re: Use public key cryptography.
« Reply #9 on: October 08, 2012, 08:52:41 PM »
Public keys cannot be used to decrypt my encrypted files... Only files which I encrypt to be read by another users public key can be decrypted by the recipient..
You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline angryChineseKahanist

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Re: Use public key cryptography.
« Reply #10 on: October 09, 2012, 12:24:32 AM »
Here is my public key:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.10 (GNU/Linux)
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=Mms2
-----END PGP PUBLIC KEY BLOCK-----


Too late. I just memorised that key. In a few minutes I will have your password.

U+262d=U+5350=U+9774

Offline muman613

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Re: Use public key cryptography.
« Reply #11 on: October 09, 2012, 12:26:24 AM »

Too late. I just memorised that key. In a few minutes I will have your password.

Sure you will....  :::D
You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline muman613

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Re: Use public key cryptography.
« Reply #12 on: October 09, 2012, 12:30:39 AM »
http://en.wikipedia.org/wiki/Pretty_Good_Privacy

Security quality

To the best of publicly available information, there is no known method which will allow a person or group to break PGP encryption by cryptographic or computational means. Indeed, in 1996, cryptographer Bruce Schneier characterized an early version as being "the closest you're likely to get to military-grade encryption."[1] Early versions of PGP have been found to have theoretical vulnerabilities and so current versions are recommended. In addition to protecting data in transit over a network, PGP encryption can also be used to protect data in long-term data storage such as disk files. These long-term storage options are also known as data at rest, i.e. data stored, not in transit.

The cryptographic security of PGP encryption depends on the assumption that the algorithms used are unbreakable by direct cryptanalysis with current equipment and techniques. For instance, in the original version, the RSA algorithm was used to encrypt session keys; RSA's security depends upon the one-way function nature of mathematical integer factoring.[2] Likewise, the symmetric key algorithm used in PGP version 2 was IDEA, which might, at some future time, be found to have a previously unsuspected cryptanalytic flaw. Specific instances of current PGP, or IDEA, insecurities—if they exist—are not publicly known. As current versions of PGP have added additional encryption algorithms, the degree of their cryptographic vulnerability varies with the algorithm used. In practice, each of the algorithms in current use is not publicly known to have cryptanalytic weaknesses.

New versions of PGP are released periodically and vulnerabilities are fixed by developers as they come to light. Any agency wanting to read PGP messages would probably use easier means than standard cryptanalysis, e.g. rubber-hose cryptanalysis or black-bag cryptanalysis i.e. installing some form of trojan horse or keystroke logging software/hardware on the target computer to capture encrypted keyrings and their passwords. The FBI has already used this attack against PGP[3][4] in its investigations. However, any such vulnerabilities apply not just to PGP, but to all encryption software.

In 2003, an incident involving seized Psion PDAs belonging to members of the Red Brigade indicated that neither the Italian police nor the FBI were able to decrypt PGP-encrypted files stored on them.[5]

A more recent incident in December 2006 (see United States v. Boucher) involving US customs agents and a seized laptop PC which allegedly contained child pornography indicates that US Government agencies find it "nearly impossible" to access PGP-encrypted files. Additionally, a judge ruling on the same case in November 2007 has stated that forcing the suspect to reveal his PGP passphrase would violate his Fifth Amendment rights i.e. a suspect's constitutional right not to incriminate himself.[6][7] The Fifth Amendment issue has been opened again as the case was appealed and the federal judge again ordered the defendant to provide the key.[8]

Evidence suggests that as of 2007, British police investigators are unable to break PGP,[9] so instead have resorted to using RIPA legislation to demand the passwords/keys. In November 2009 a British citizen was convicted under RIPA legislation and jailed for 9 months for refusing to provide police investigators with encryption keys to PGP-encrypted files.[10]
[edit]
You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline BritishSword

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Re: Use public key cryptography.
« Reply #13 on: October 09, 2012, 01:58:24 AM »
BCtext encoder is compatible with PGP public keys.
  So thats fine if you already use gpg/pgp software no need to download what I put there.

Quote
The problem is I can't force people to encrypt emails they send me, and I can't expect them to go through the trouble of decrypting the mails I send them. Except for this two little problems which render encrypted communication all but useless, gpg is awesome.

Ahhh problem in chair not in computer.
Don't worry zelhar I'm a crypto fanatic you send me as many crypted things as you like I will go to the trouble of decrypting them. It will only take 2 seconds... I mean what trouble?

I'm not sure how you guys managed to post the text block of your public keys, I had to link to mine in certificate format, how did you do that?

-------
I also wasn't talking about just email. If something went wrong with the PM system for some reason we could post messages on the public board and still have them only be read by the intended recipient. How cool is that?  :dance:

Also JTF is virtually hack proof - thanks shlomo.
But in the million to one chance that my account is compromised I could ensure that private messages stay private.
I'm British. I'm Sharp.  I'm Deadly.
I am BritishSword

6a55022f0e321cd66b22318630573230965751cf

Offline BritishSword

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Re: Use public key cryptography.
« Reply #14 on: October 09, 2012, 02:04:26 AM »
: angryChineseKahanist
Too late. I just memorised that key. In a few minutes I will have your password.

Sure you will....  :::D

Angrychinesekahanist is good with numbers. All he has to do is factor some unbelievably massive prime numbers.  ;D
I'm British. I'm Sharp.  I'm Deadly.
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6a55022f0e321cd66b22318630573230965751cf

Offline muman613

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Re: Use public key cryptography.
« Reply #15 on: October 09, 2012, 02:33:34 AM »
BCtext encoder is compatible with PGP public keys.
  So thats fine if you already use gpg/pgp software no need to download what I put there.

Ahhh problem in chair not in computer.
Don't worry zelhar I'm a crypto fanatic you send me as many crypted things as you like I will go to the trouble of decrypting them. It will only take 2 seconds... I mean what trouble?

I'm not sure how you guys managed to post the text block of your public keys, I had to link to mine in certificate format, how did you do that?

-------
I also wasn't talking about just email. If something went wrong with the PM system for some reason we could post messages on the public board and still have them only be read by the intended recipient. How cool is that?  :dance:

Also JTF is virtually hack proof - thanks shlomo.
But in the million to one chance that my account is compromised I could ensure that private messages stay private.

I utilized the GPG command :

$> gpg --export -a [keyid]

I just generated a gpg key for my home machine...


-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.11 (GNU/Linux)
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=
=gkWY
-----END PGP PUBLIC KEY BLOCK-----
You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline BritishSword

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Re: Use public key cryptography.
« Reply #16 on: October 09, 2012, 02:50:37 AM »
Testing Mumans new public key.

-----BEGIN PGP MESSAGE-----
Version: BCTextEncoder Utility v. 1.00.6

wcBMAy52edkwNMmMAQgAs9Q6M4mg2gvgYyqYYUecp1zab2C8lHaPmiq95VWK58JI
D99HwxtNBgqdlm6Top6uUk1tn1AQzUwzAgIHkR+b3aRludhSjtsSJf1aiaJ3XSLf
PdlYBp+5M9xl7oDnJn6GvJiiOXhdbIxz6g2iiRvFhZCiAG9hb96z7yCFkQq0Z775
elOUr4nfwrZSSKM4Xt8vOi0cVP9khU0A/x9GLDdFnce3cXQ84hvXppSqgORfdHFy
NnlRsLoK7+E51+50v7r+b6kn0LsgBxPWjb/1slY6hnJRNtTTQgWCyaHQDxf5vx6A
ZJMyzpfZQnNrvPDe1QhaBE+XutgdVfg5fRIu0CyEmtLpAQLYQ+xHSKV+qFMC34hQ
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lYd7p0RqFFTlGnajLwvQ+FiqKMS9iQx2KACCapYRrtgPdWY6HHCm6oIOYANE8rp/
366CJ+R/18JBcjWlTE2ClITlpbpqG3tObstybX1cXgHRv0RAyF2jv5bzW3iR6/tx
wOtBibjLzLT6MXxK1D2TW2hXIfNofc4pkzHZQVHAnP47Zq+GVeGCVPNCDo/VS8Hp
QItMSYtdIB44K6a3kffMwWjhBKisnEjK+9FpnlnVTuM/Q82pPSjoIqXwRvOXGp4r
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Us7IFrgYHBkyMcQp66QYv60bzupJVdjngee+qwBz+XJQf20C2pk2tg98Om8L+Ve/
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9ApUzX8WGWF53hTf7/G0PnCAHrhgEJRaRvF4KESatjifa3tqFtDDdzureFLIqPyC
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N1w0jwKxz+ie9wrwNVdOXiCS6JpZlmNdJa+Tjebb3+78yxhJfUxDf24gtS81/tkI
tAkwkgJDw00++B3Lt19M68oDMZxis+Phy5tB8dT0diGs3fqjFwaQsnjjYBVrt8Wk
vM8Be/W8HiBq9xQUyxVKNi8vrCmixjG21TOAwSBAZtlvqIbZLlb1f05lcUyK0kPf
x1vAEnAGenGsOV+ezSdrnoMx2on+8+cAf8P3xRyVQuz/ZI/x3HGnc3gR4rmzEZi/
ZzxV0+UOgaa4tJoP1izBBBUvmAAzU0x40Js5V56vhghLincPkVkqcih7F0ojmwoS
XyFK45yAUeCL/D9JgwjDBRCaWYByDHKhtyT4ZJW0a3B8redjTSi65krq6OXzqCsb
dI0yuibwWu2/aD6WBCjiUJWu87YmpkCxJqHeL5kuLVgkQ06fq4rJpSGbFz5iLyrs
0nAwbpLPx5+LU4JsMeN8xFOeyGUesg==
-----END PGP MESSAGE-----
I'm British. I'm Sharp.  I'm Deadly.
I am BritishSword

6a55022f0e321cd66b22318630573230965751cf

Offline muman613

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Re: Use public key cryptography.
« Reply #17 on: October 09, 2012, 02:55:48 AM »
BritishSword,

I cannot import your key in .cer (Cert) file format. I have been looking for a way to import that key but have not found a way yet.

I will try to get your key imported and try to decode your message...

You shall make yourself the Festival of Sukkoth for seven days, when you gather in [the produce] from your threshing floor and your vat.And you shall rejoice in your Festival-you, and your son, and your daughter, and your manservant, and your maidservant, and the Levite, and the stranger, and the orphan, and the widow, who are within your cities
Duet 16:13-14

Offline BritishSword

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Re: Use public key cryptography.
« Reply #18 on: October 09, 2012, 03:22:53 AM »
BritishSword,

I cannot import your key in .cer (Cert) file format. I have been looking for a way to import that key but have not found a way yet.

I will try to get your key imported and try to decode your message...

LOL
that message is encoded to you not me, use the key you just generated.
I'm British. I'm Sharp.  I'm Deadly.
I am BritishSword

6a55022f0e321cd66b22318630573230965751cf

Offline angryChineseKahanist

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Re: Use public key cryptography.
« Reply #19 on: October 09, 2012, 04:46:50 AM »
I already got the first character of muman's password. It is a letter in the alphabet.
U+262d=U+5350=U+9774

Offline Zelhar

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Re: Use public key cryptography.
« Reply #20 on: October 09, 2012, 07:21:28 AM »
BCtext encoder is compatible with PGP public keys.
  So thats fine if you already use gpg/pgp software no need to download what I put there.

Ahhh problem in chair not in computer.
Don't worry zelhar I'm a crypto fanatic you send me as many crypted things as you like I will go to the trouble of decrypting them. It will only take 2 seconds... I mean what trouble?

I'm not sure how you guys managed to post the text block of your public keys, I had to link to mine in certificate format, how did you do that?

-------
I also wasn't talking about just email. If something went wrong with the PM system for some reason we could post messages on the public board and still have them only be read by the intended recipient. How cool is that?  :dance:

Also JTF is virtually hack proof - thanks shlomo.
But in the million to one chance that my account is compromised I could ensure that private messages stay private.
If you use linux you can export the key and save it in a text format. Either using command line or with a gui program like kgpg (KDE) or gnupg (gnome). The keys are by default given name like "my key.asc" but they are actually plain text files. Encrypted files are usually given a name like "name.ext.asc".