encryption bloats file

Scott Lambdin lopaki at gmail.com
Sat Jan 10 04:33:52 CET 2009

I found a file in rejects, but it may be partial.  It gives us some
information, though.

The pgp file was 406184088 bytes and unencrypted is 175246253 bytes.

gpg -v -v -o a_file.out -d a_file.pgp

gpg: armor header: Version: McAfee E-Business Server v7.5 - Full License
:pubkey enc packet: version 3, algo 1, keyid 123456789012345
        data: [2047 bits]
gpg: public key is ABCD1234
You need a passphrase to unlock the secret key for
user: "Janeane Garofalo <JG at thyservice.com>"
2048-bit RSA key, ID ABCD4321

gpg: public key encrypted data: good DEK
:encrypted data packet:
        length: 42097820
gpg: encrypted with 2048-bit RSA key, ID ABCD4321
gpg: IDEA encrypted data
:compressed packet: algo=1
:literal data packet:
        mode t (74), created 1509949440, name="file-100-1",
        raw data: 227869810 bytes
gpg: original file name="file100"
gpg: no valid OpenPGP data found.
gpg: fatal: zlib inflate problem: invalid block type
secmem usage: 2208/4704 bytes in 5/15 blocks of pool 4960/32768

On Fri, Jan 9, 2009 at 10:02 PM, Roscoe <eocsor at gmail.com> wrote:

> Dunno how likely it is, but maybe someone made an attempt at hiding
> the size of the file in transit via appending arbitrary data.
> 2009/1/10 Scott Lambdin <lopaki at gmail.com>:
>  > Hello -
> >
> > Someone sends us a big ~700MB pgp encrypted file and when we decrypt it
> the
> > resulting file is about half that size.  Anyone have an idea what they
> might
> > be doing to swell it up like that?
> >
> > --
> > There's a box?
> >
>  > _______________________________________________
> > Gnupg-users mailing list
> > Gnupg-users at gnupg.org
> > http://lists.gnupg.org/mailman/listinfo/gnupg-users
> >
> >

There's a box?
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