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 Forum index » Off-Topic Area » Security
Is there a Linux way to send encrypted email attachments?
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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Sat 07 Jan 2012, 04:34    Post subject:  Is there a Linux way to send encrypted email attachments?
Subject description: Encrypted html: info can be decrypted by any browser with javascript.
 

Anyone know of a Linux equivalent of this type of encryption program ...

Quote:
send secure attachments by e-mail without worries. The receiver of an e-mail with an encrypted file will only need the right password and a browser to decrypt the e-mail
http://www.safeit.com/products/fileenc/

Your data is converted into an encrypted html file which you send by email, the "killer application" is the recipient does not have to install any software : the decryption takes place in their browser via javascript. So it is independent of OS.

Last edited by Barkin on Fri 13 Jan 2012, 03:18; edited 2 times in total
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amigo

Joined: 02 Apr 2007
Posts: 2217

PostPosted: Sat 07 Jan 2012, 04:50    Post subject:  

Java code which runs inside a browser means it needs no OS-dependent equivalent -you just need a browser and java.
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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Sat 07 Jan 2012, 07:08    Post subject:  

amigo wrote:
Java code which runs inside a browser means it needs no OS-dependent equivalent -you just need a browser and java.

Yes the decryption is not OS specific, but that encryption program is windows only.

I hoped there would be a Linux version somewhere of the encryption program.

If anyone knows of html encryption like that which runs on entirely javascript that would be ideal, (i.e. both encryption and decryption in the browser).

Last edited by Barkin on Sun 08 Jan 2012, 11:06; edited 1 time in total
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linuxbear

Joined: 18 Apr 2009
Posts: 621
Location: Las Vegas, Nevada, USA

PostPosted: Sat 07 Jan 2012, 12:55    Post subject:  

I would love to find a JAVA based encryption which would allow me to encrypt a directory and give me the ability to decrypt it by typing a password into a browser from any OS. So far, the only thing that comes close to this is "tiddlywiki" The problem with tiddlywiki is you can encrypt within the ap and open with any browser, but i will not allow folders to be included in the portable wiki.
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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Sat 07 Jan 2012, 21:35    Post subject:  

Thanks for the link to "tiddlywiki" , it led me to "message vault” which looks promising ...

Quote:
Message Vault is a "Portable Self-decrypting Archive", written in HTML and Javascript. That means that it's a single file that can be opened in a web browser for reading, editing, encryption and decryption. The one HTML file carries the encrypted message plus the code to encrypt/decrypt/edit it.
http://www.kokogiak.com/gedankengang/2007/03/introducing-message-vault.html
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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Sun 08 Jan 2012, 00:45    Post subject:  

this sort of thing, (attached), but like linuxbear says, capable of handling folders (directories).
(BTW to decrypt click on "Decrypt" below the pink box and the plain text appears in the green box).
jscrypt-encryption AND decryption in browser.zip
Description  "JavaScrypt Encryption and Decryption", html file zipped.
zip

 Download 
Filename  jscrypt-encryption AND decryption in browser.zip 
Filesize  10.16 KB 
Downloaded  134 Time(s) 
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technosaurus


Joined: 18 May 2008
Posts: 4279

PostPosted: Sun 08 Jan 2012, 03:20    Post subject:  

you don't _need_ a browser and java though

tar -czf dirname.tar.gz ./dirname
bcrypt dirname.tar.gz

pretty sure tar and bcrypt are cross platform

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jpeps

Joined: 31 May 2008
Posts: 3220

PostPosted: Sun 08 Jan 2012, 03:42    Post subject:  

technosaurus wrote:
you don't _need_ a browser and java though

tar -czf dirname.tar.gz ./dirname
bcrypt dirname.tar.gz

pretty sure tar and bcrypt are cross platform


The person on the other end has to have bcrypt, and then know what to do with a tar.gz file.

It's amazing how much confidential info I get via email...from lawyers assistants, etc., that think it's a replacement for fax. Makes me cringe.

Barkin...This might be useful. I saved an OpenOffice file in RTF, and it encrypted nicely. This might work.
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RetroTechGuy


Joined: 15 Dec 2009
Posts: 2666
Location: USA

PostPosted: Sun 08 Jan 2012, 23:31    Post subject:  

jpeps wrote:
technosaurus wrote:
you don't _need_ a browser and java though

tar -czf dirname.tar.gz ./dirname
bcrypt dirname.tar.gz

pretty sure tar and bcrypt are cross platform


The person on the other end has to have bcrypt, and then know what to do with a tar.gz file.

It's amazing how much confidential info I get via email...from lawyers assistants, etc., that think it's a replacement for fax. Makes me cringe.

Barkin...This might be useful. I saved an OpenOffice file in RTF, and it encrypted nicely. This might work.


I used GPG in 4.3.1 (I should reinstall it under 5.28).

This requires you make a GPG (i.e PGP) key, and distribute the public key, and that your recipient do likewise...

I write and encrypt such messages inside a truecrypt container (so the clear-text is encrypted)

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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Mon 09 Jan 2012, 01:42    Post subject:  

RetroTechGuy wrote:
I used GPG ... I write and encrypt such messages inside a truecrypt container (so the clear-text is encrypted)

So the Truecrypt file, which is encrypted, is encrypted again*.

A belt and braces man like myself: would you like to borrow my tin-foil balaclava ? :¬)

[* just in case the honeypot-backdoor rumors about Truecrypt are true ]
tinman.jpg
 Description   Source of image ... https://secure.flickr.com/photos/robnwatkins/397488557/ [it's not me]
 Filesize   20.22 KB
 Viewed   487 Time(s)

tinman.jpg

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RetroTechGuy


Joined: 15 Dec 2009
Posts: 2666
Location: USA

PostPosted: Mon 09 Jan 2012, 02:17    Post subject:  

Barkin wrote:
RetroTechGuy wrote:
I used GPG ... I write and encrypt such messages inside a truecrypt container (so the clear-text is encrypted)

So the Truecrypt file, which is encrypted, is encrypted again*.

A belt and braces man like myself: would you like to borrow my tin-foil balaclava ? :¬)


No, the clear text is typed and encrypted inside the truecrypt container (the resulting GPG file inside is a temporary issue, as it is of no use to YOU, unless you wrote it to yourself).

This keeps the clear-text encrypted (not visible on the regular partition, even if deleted).

The side effect generally is that the GPGed version is also inside, but you can delete that after sending (and it allows you to keep a clear-text copy of what you sent).

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linuxbear

Joined: 18 Apr 2009
Posts: 621
Location: Las Vegas, Nevada, USA

PostPosted: Tue 10 Jan 2012, 00:03    Post subject:  

technosaurus wrote:
you don't _need_ a browser and java though

tar -czf dirname.tar.gz ./dirname
bcrypt dirname.tar.gz

pretty sure tar and bcrypt are cross platform


I am already using encrypted documents, PDFs and encrypted zip files on my pendrive. The problem is that this requires the installation or existence of installed zip and office suite applications on any machine that the drive is plugged into. The great thing about tiddlywiki is that it can be opened on any machine that has a browser installed. Tiddly will not encrypt folders, but does encrypt itself otherwise. This can probably be done inside an HTLM app, but I do not have the time to learn JAVA. The idea here is, plug into any machine, get stuff.
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mahaju


Joined: 11 Oct 2010
Posts: 493
Location: between the keyboard and the chair

PostPosted: Tue 10 Jan 2012, 01:35    Post subject:  

< posting to get notifications about further replies to this topic >
< Please don't mind Smile >
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jim3630


Joined: 13 Feb 2011
Posts: 792
Location: Northern Nevada

PostPosted: Thu 12 Jan 2012, 14:57    Post subject:  

have not tried Tiddly.

1+ Truecrypt. the receiver only need some kind of word processor and the key to open it and it does folders.

the attached pet also works. think it is DPUP5520
FolderEnc-1.0.pet
Description 
pet

 Download 
Filename  FolderEnc-1.0.pet 
Filesize  505.31 KB 
Downloaded  183 Time(s) 
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Barkin


Joined: 12 Aug 2011
Posts: 676

PostPosted: Thu 12 Jan 2012, 23:27    Post subject:  

jim3630 wrote:
1+ Truecrypt. the receiver only need some kind of word processor and the key to open it and it does folders.

I may have got the wrong end of the stick again, but I’m sure Truecrypt has to be installed on the recipient’s computer for them to be able to open it.

I don’t think Truecrypt do a self-extracting option, 7-Zip does, but self-extracting files are OS specific.
tinman.zip
Description  A truecrypt volume in a Zip file, password "tinman",
should be readable on any OS which has Truecrypt installed.
zip

 Download 
Filename  tinman.zip 
Filesize  300.21 KB 
Downloaded  294 Time(s) 
'tinman' in 7z self-extracting exe for Windows.zip
Description  self-extracting encrypted 7z file (.exe), in zip file, password is 'tinman'.
Can only be opened in windows or simulation thereof.
zip

 Download 
Filename  'tinman' in 7z self-extracting exe for Windows.zip 
Filesize  91.08 KB 
Downloaded  169 Time(s) 
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