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  • Re: an scos2 test...

    From Rich@21:1/5 to Chris M. Thomasson on Fri Jul 26 03:54:29 2024
    Chris M. Thomasson <chris.m.thomasson.1@gmail.com> wrote:
    I dug up my old impl of scos2. Does this work for you?

    scos2 247 742

    *,B|A D@[>+i p"= ;_{ )3xy $yx5 ojts wihkb#

    KWNYTZ JYFQV,H.Nw

    rXZ

    scos2 65 33

    0ZGS XB sJ@ lH ~i<8/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Richard Harnden@21:1/5 to Chris M. Thomasson on Fri Jul 26 10:32:10 2024
    On 26/07/2024 06:15, Chris M. Thomasson wrote:
    On 7/25/2024 8:54 PM, Rich wrote:
    scos2 65 33

    0ZGS XB sJ@ lH ~i<8/

    For some reason I am getting a plaintext of:

    ~U9o My 8/g v[ Ym9\;

    using my impl and Rich's original scos2 impl.

    The key is wrong, try:

    28 60
    0ZGS XB sJ@ lH ~i<8/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rich@21:1/5 to Chris M. Thomasson on Fri Jul 26 13:55:15 2024
    Chris M. Thomasson <chris.m.thomasson.1@gmail.com> wrote:
    On 7/25/2024 8:54 PM, Rich wrote:
    scos2 65 33

    0ZGS XB sJ@ lH ~i<8/

    For some reason I am getting a plaintext of:

    ~U9o My 8/g v[ Ym9\;

    I do too, when I try.

    Give this a try instead:

    ,j@& t, Mr, R1 Ga3\,

    using my impl and Rich's original scos2 impl.

    Here is the ciphertext for using Rich's original SCOS2 with a key of 3 7 ________
    Hello World
    ________

    Ko29_ 8/CDC


    Can you decrypt it? Thanks.

    Yes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Fri Jul 26 17:36:39 2024
    Chris M. Thomasson in sci.crypt:

    [...]

    I finally found the original SCOS2 code! Here it is:

    scos2 712 901
    [...]

    scos2 712 901
    (" 1O: lN)2S~ ^Z? -YD) sG :rL "SB(} VE5d P=

    <wT;2Z,8fC^lI-rO]xU:3a<9gD&mJ+sP#yV/4b\!hE*nK=tQ~zW?5c|"i
    5mL^qT(]Y,sQA$' aZlgK.
    z
    (vZ{
    \
    S|%bD+en]yF)2Zq
    ~IDxa> +cL#8 P'pN ;wn~yn, ^fW)uGo0v
    S"S>TYK'rS [xJ@ 6P["VHU>HC
    ^_[lXB4fB %l/9l >-h X@sa{8 b< ^m?*tPE
    * w ]zL} v S\zlP)tPf j G_oaE7iES?FA_3
    T

    yI.7b. _+
    l
    X*nK=tQ~zW?5c|"iF(oL{uR'0X.6dA$jG)pM}vS@1Y>7eB%kH_qN[wT;2

    D5i D4iL^d D%z D 7T}I{v E)h <)s Q$vWDHM >y

    rW~wW/4eE8lHql]uU@35Y"!cBjo=rqS0s/41b\hgB)l}tPL=YU~6b\7eAllL=tU2

    :\=tM#<!hsa.$eESbG)hJ^BG@z(~Li@7;>=0O@AHjY~FkjV5PBrT7}Bz4%t;jN>be!q|

    ~%1J{1
    --
    ╮ ╭─╮ ╭────╮ ╭────╮ ..41..╭────────╮ ╭──────────
    ╰──╯ ╰─╮ ╭────╯ ╭─╯ ╭─╯ ╭─╯ │ ╭────╯ │ ..67..
    ╰─╮ ╭──╮ ╰───╮ ╰─╮ │ ╭─╯ ╭───────╮ │ ╰─╮ ╭─╮ ╭─╯ ..67..
    ╰─╯ ╰──────╯ ╰─╯ ╰───╯ ╰─╯ ╰──╯ ╰─╯ ..67..

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Fri Jul 26 17:51:03 2024
    Marcel Logen in sci.crypt:

    Chris M. Thomasson in sci.crypt:

    [...]

    I finally found the original SCOS2 code! Here it is:

    scos2 712 901
    [...]

    scos2 712 901

    Sorry, this should read:

    /----------------------
    (" 1O: lN)2S~ ^Z? -YD) sG :rL "SB(} VE5d P=

    <wT;2Z,8fC^lI-rO]xU:3a<9gD&mJ+sP#yV/4b\!hE*nK=tQ~zW?5c|"i
    5mL^qT(]Y,sQA$' aZlgK.
    z
    (vZ{
    \
    S|%bD+en]yF)2Zq
    ~IDxa> +cL#8 P'pN ;wn~yn, ^fW)uGo0v
    S"S>TYK'rS [xJ@ 6P["VHU>HC
    ^_[lXB4fB %l/9l >-h X@sa{8 b< ^m?*tPE
    * w ]zL} v S\zlP)tPf j G_oaE7iES?FA_3
    T

    yI.7b. _+
    l
    X*nK=tQ~zW?5c|"iF(oL{uR'0X.6dA$jG)pM}vS@1Y>7eB%kH_qN[wT;2

    D5i D4iL^d D%z D 7T}I{v E)h <)s Q$vWDHM >y

    rW~wW/4eE8lHql]uU@35Y"!cBjo=rqS0s/41b\hgB)l}tPL=YU~6b\7eAllL=tU2

    :\=tM#<!hsa.$eESbG)hJ^BG@z(~Li@7;>=0O@AHjY~FkjV5PBrT7}Bz4%t;jN>be!q| \----------------------

    Marcel (Lines: 47)
    --
    ╭────────╮ ╭─╮ ╭─╮ ╭─────╮ ╭─╮..49..╭──────╮ ╭──╮
    ...3..╭─╮ ╰─────╮ ╰──╯ ╰───╯ │ ╰───╮ ╰──╯ ╰─╮ ╭─╯ ╭──╮ │ │ │
    ╭───╮ │ │ ╭──────╯ ..28..╰───╮ ╰─╮ ╭───╯ ╰───╯ │ ╰─╯ │ ╭─
    ╭─╯ ╰─╯ ╰─╯ ╰────╯ ╰─────────────╯..61..╰───╯

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Fri Jul 26 17:55:48 2024
    Marcel Logen in sci.crypt:

    Marcel Logen in sci.crypt:

    scos2 712 901

    Sorry, this should read:

    /----------------------
    (" 1O: lN)2S~ ^Z? -YD) sG :rL "SB(} VE5d P=

    <wT;2Z,8fC^lI-rO]xU:3a<9gD&mJ+sP#yV/4b\!hE*nK=tQ~zW?5c|"i
    5mL^qT(]Y,sQA$' aZlgK.
    z
    (vZ{
    \
    S|%bD+en]yF)2Zq
    ~IDxa> +cL#8 P'pN ;wn~yn, ^fW)uGo0v
    S"S>TYK'rS [xJ@ 6P["VHU>HC
    ^_[lXB4fB %l/9l >-h X@sa{8 b< ^m?*tPE
    * w ]zL} v S\zlP)tPf j G_oaE7iES?FA_3
    T

    yI.7b. _+
    l
    X*nK=tQ~zW?5c|"iF(oL{uR'0X.6dA$jG)pM}vS@1Y>7eB%kH_qN[wT;2

    D5i D4iL^d D%z D 7T}I{v E)h <)s Q$vWDHM >y

    rW~wW/4eE8lHql]uU@35Y"!cBjo=rqS0s/41b\hgB)l}tPL=YU~6b\7eAllL=tU2

    :\=tM#<!hsa.$eESbG)hJ^BG@z(~Li@7;>=0O@AHjY~FkjV5PBrT7}Bz4%t;jN>be!q| >\----------------------

    Please note the indentation.

    Marcel (Lines: 42)
    --
    ╭───╮ ╭───╮ ╭────╮ ..67..
    ╰─╮ ╰─╮ ╭─╯ ╰──╮ ╭─╮ ╭─╮ ╭────╯ ╰─╮ ..67..
    ╮ ╰─╮ │ ╭─╮ ╭──╮ ╭───╮ ╭──╯ ╭─────╯ │ │ │ ╰─╯ ..57..╰────╮
    ╰────╯ ╰─╯ ╰───╯ ╰─╯ ╰─╯ ╰────────╯ ╰──╯ ..62..╰────

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Fri Jul 26 18:03:37 2024
    Marcel Logen in sci.crypt:

    Marcel Logen in sci.crypt:
    Marcel Logen in sci.crypt:

    scos2 712 901

    Sorry, this should read:

    /----------------------
    (" 1O: lN)2S~ ^Z? -YD) sG :rL "SB(} VE5d P=

    <wT;2Z,8fC^lI-rO]xU:3a<9gD&mJ+sP#yV/4b\!hE*nK=tQ~zW?5c|"i
    5mL^qT(]Y,sQA$' aZlgK.
    z
    (vZ{
    \
    S|%bD+en]yF)2Zq
    ~IDxa> +cL#8 P'pN ;wn~yn, ^fW)uGo0v
    S"S>TYK'rS [xJ@ 6P["VHU>HC
    ^_[lXB4fB %l/9l >-h X@sa{8 b< ^m?*tPE
    * w ]zL} v S\zlP)tPf j G_oaE7iES?FA_3
    T

    yI.7b. _+
    l
    X*nK=tQ~zW?5c|"iF(oL{uR'0X.6dA$jG)pM}vS@1Y>7eB%kH_qN[wT;2

    D5i D4iL^d D%z D 7T}I{v E)h <)s Q$vWDHM >y

    rW~wW/4eE8lHql]uU@35Y"!cBjo=rqS0s/41b\hgB)l}tPL=YU~6b\7eAllL=tU2

    :\=tM#<!hsa.$eESbG)hJ^BG@z(~Li@7;>=0O@AHjY~FkjV5PBrT7}Bz4%t;jN>be!q| \----------------------

    Please note the indentation.

    Oh, it's too hard for me! ;-)

    Marcel (Lines: 45)
    --
    │ ╭──╮ ╭────╮ ╭───────╮ ╭─╮ ..61..╭──╮
    ╰─╮ ╭─╯ ╰─╯ ╰─╮ ╰────╮ ╰───╯ ╰──╮ ..57..╭───╯ ╰──
    │ ╭───╮ ╭───╯ ╭──────╯ ╭─╮ ╰───╮ ╭────╯ ╭─╮ │ ..67..
    ╰─────╯ ╰──╯ ╰─────────╯ ╰───────╯ ╰──────╯ ╰───╯ ..67..

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ben Bacarisse@21:1/5 to Chris M. Thomasson on Sat Jul 27 01:20:34 2024
    "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:

    On 7/26/2024 2:32 AM, Richard Harnden wrote:
    On 26/07/2024 06:15, Chris M. Thomasson wrote:
    On 7/25/2024 8:54 PM, Rich wrote:
    scos2 65 33

    0ZGS XB sJ@ lH ~i<8/

    For some reason I am getting a plaintext of:

    ~U9o My 8/g v[ Ym9\;

    using my impl and Rich's original scos2 impl.
    The key is wrong, try:
    28 60
    0ZGS XB sJ@ lH ~i<8/

    Indeed it works like a charm. It had to be a "key issue". Humm... That
    would be a fun test? Try different keys and log "readable" results wrt decrypted plaintext? ;^)

    Yes. Somewhere I have a program that just tries all keys. I was going
    to get it to stop when English (or C) letter frequencies were found but
    it turned out simpler just to eyeball the output. As a human, you can
    spot a decrypt a mile off and, if I remember correctly, SCOS has "close decrypts" that I could spot but which would look, statistically, like plaintext.

    --
    Ben.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Richard Harnden@21:1/5 to Ben Bacarisse on Sat Jul 27 08:20:37 2024
    On 27/07/2024 01:20, Ben Bacarisse wrote:
    "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:

    On 7/26/2024 2:32 AM, Richard Harnden wrote:
    On 26/07/2024 06:15, Chris M. Thomasson wrote:
    On 7/25/2024 8:54 PM, Rich wrote:
    scos2 65 33

    0ZGS XB sJ@ lH ~i<8/

    For some reason I am getting a plaintext of:

    ~U9o My 8/g v[ Ym9\;

    using my impl and Rich's original scos2 impl.
    The key is wrong, try:
    28 60
    0ZGS XB sJ@ lH ~i<8/

    Indeed it works like a charm. It had to be a "key issue". Humm... That
    would be a fun test? Try different keys and log "readable" results wrt
    decrypted plaintext? ;^)

    Yes. Somewhere I have a program that just tries all keys. I was going
    to get it to stop when English (or C) letter frequencies were found but
    it turned out simpler just to eyeball the output. As a human, you can
    spot a decrypt a mile off and, if I remember correctly, SCOS has "close decrypts" that I could spot but which would look, statistically, like plaintext.


    I have one that tries to find consistent incr's in 3-letter word-blocks.
    Hopefully the correct base and incr bubble to the top.

    It's better with longer texts, but ...

    $ cat test.scos
    0ZGS XB sJ@ lH ~i<8/

    $ ./decode_scos test.scos | ./scos
    ./decode_scos: Not sure, but ...
    -28 -60
    Yes, it can be read.

    -71 -60
    =~Bu :C ]}, [~ A~}#s

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Sat Jul 27 12:22:55 2024
    Chris M. Thomasson in sci.crypt:

    On 7/26/2024 8:36 AM, Marcel Logen wrote:
    Chris M. Thomasson in sci.crypt:

    I finally found the original SCOS2 code! Here it is:
    [...]

    1930...9f

    ?

    That's OK.

    But note: The indentation in the whole code is done by
    two SPACEs per step. Exception: in the last "fprintf"
    command.

    Marcel (Lines: 24)
    --
    ╭────╮ ╭────╮ ╭──╮ ╭───────╮ ╭─╮ ..67..
    ╭───╯ ╭─╯ ╰─╮ │ ╭─╯ ╰─╮ ╭─╮ ╭─╮ ╰─────╮ ╰─╯ ╰─╮ ╭───╮
    │ ╰─╮ ╭─╯ ╰─╯ ╭─╯ │ ╰─╮ ╭─╯ ╰────╮ │ ..55..╰─╯ │ ╭─╮
    ╭──╯ ╰────╯ ╰───╯ ╰─╯ ╰───╯ ..61..╰─╯ ╰─

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Marcel Logen@21:1/5 to All on Sat Jul 27 12:45:50 2024
    Marcel Logen in sci.crypt:

    Chris M. Thomasson in sci.crypt:

    [SHA256 of SCOS2 code]
    1930...9f

    ?

    That's OK.

    But note: The indentation in the whole code is done by
    two SPACEs per step. Exception: in the last "fprintf"
    command.

    The file size of Richard Heathfield's code is
    1753 Bytes, BTW. (After changing the last fprintf
    command.)

    Original reference implementation: <http://al.howardknight.net/?ID=166748721500>
    (without change in the last fprintf)

    Change:
    <http://al.howardknight.net/?ID=166786341400>

    Marcel (Lines: 32)
    --
    ╭─╮ ╭──╮ ..52..╭────────╮ ╭───
    ╭───╮ ╭─╯ │ ╭─╯ ╰─╮ ╭─╮ ╭─╮ ╰─╮..61..╰─╯
    ╭─╯ ╰──╮ ╭─╮ ╭───╮ │ ╰───╯ ╭───╯ ╭─╯ ╰─╯ │ ╭──╮ │ ..67..
    ╯ ╰───╯ ╰─╯ ╰─────╯ ╰─────╯ ╰─╯ ╰─╯ ..67..

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Richard Harnden@21:1/5 to Chris M. Thomasson on Wed Jul 31 11:24:21 2024
    On 31/07/2024 05:09, Chris M. Thomasson wrote:
    On 7/30/2024 9:08 PM, Chris M. Thomasson wrote:
    On 7/27/2024 12:20 AM, Richard Harnden wrote:
    On 27/07/2024 01:20, Ben Bacarisse wrote:
    "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> writes:
    [...]
    The key space is not that massive, so it can be brute forced for sure.
    However, its interesting wrt the plaintext. What if the plaintext is
    generated from a random source?

    Afaict, if the plaintext is random, then its going to be hard to
    identify it as a legit plaintext?

    If the plain text is random, then you'd never know if you got the
    correct decrypt anyway.

    It only works for English (or C) text. It seems to work okay for French
    and "lorem ipsum". It doesn't like German.

    It's doubtless slower cpu-timewise that brute forcing. It saves on eyeball-time.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)