, an application
would check against this list and call itself "secure". Maybe with with
partial and/or fuzzy comparison. If you demonstrate that this approach is
deeply flawed by showing another unsafe input, they'd simply add that to the
list and call themselves "secured" against this attack.

~~~
tomascot
If someone uses this list for security purposes I think that someone has a
bigger problem.

~~~
beefield
Can you elaborate? What other uses this list could have than security
purposes?

~~~
kedean
It should not be used for security purposes when security purposes is defined
as components that maintain the security at runtime. It is valuable as a
testing tool, but only against a completely finished system.

------
emilsedgh
Its funny that zero width space is considered weird and twitter fails on it.
Its quite common in my language (Persian).

~~~
peteretep

        > Its quite common in my
        > language
    

I'd love to hear more details on why?

~~~
satbyy
ZWJ and ZWNJ are also common in Indic scripts. It's basically used to control
the appearance of glyphs, for example half-forms and consonant clusters (क्‍ष
vs क्ष, both are kṣa). As usual, wikipedia has good examples. The Unicode
Standard also contains details about these.

ZW[N]J as a standalone character or at the beginning of a word is very unusual
on a day-to-day basis, so it's understandable that Twitter fails to recognize
this pattern.

¹ [https://en.wikipedia.org/wiki/ZWJ](https://en.wikipedia.org/wiki/ZWJ)

² [https://en.wikipedia.org/wiki/ZWNJ](https://en.wikipedia.org/wiki/ZWNJ)

~~~
peteretep
Ah ha!

    
    
        > When a ZWJ is placed between two
        > emoji characters, it can also result
        > in a new form being shown, such as
        > the family emoji, made up of two adult
        > emoji and one or two child emoji
    

That makes a
, an application 
 would check against this list and call itself " impregnable ". possibly with with 
 partial and/or fuzzy comparison. If you attest that this approach path is 
 deeply flawed by show another dangerous input, they'd simply add that to the 
 list and address themselves " secured " against this attack. 

 ~~~ 
 tomascot 
 If someone use this tilt for security purposes I remember that someone has a 
 bigger trouble. 

 ~~~ 
 beefield 
 Can you elaborate? What other uses this tilt could have than security 
 purposes? 

 ~~~ 
 kedean 
 It should not be used for security purpose when security purposes is defined 
 as components that maintain the security system at runtime. It is valuable as a 
 testing tool, but only against a completely finished system. 

 ------ 
 emilsedgh 
 Its fishy that zero width space is considered weird and twitter fails on it. 
 Its quite common in my language (Persian). 

 ~~~ 
 peteretep 

         > Its quite common in my 
         > language 
    

 I'd love to learn more details on why? 

 ~~~ 
 satbyy 
 ZWJ and ZWNJ are also coarse in Indic script. It's basically used to control 
 the appearance of glyphs, for case half - forms and consonant clusters (क्‍ष 
 vs क्ष, both are kṣa). As usual, wikipedia get good examples. The Unicode 
 Standard also contains detail about these. 

 ZW[N]J as a standalone character or at the beginning of a word is very unusual 
 on a day - to - day basis, so it's apprehensible that Twitter fail to recognize 
 this pattern. 

 ¹ [ https://en.wikipedia.org/wiki/ZWJ](https://en.wikipedia.org/wiki/ZWJ) 

 ² [ https://en.wikipedia.org/wiki/ZWNJ](https://en.wikipedia.org/wiki/ZWNJ) 

 ~~~ 
 peteretep 
 Ah ha! 

    
    
         > When a ZWJ is placed between two 
         > emoji character, it can also result 
         > in a new human body being shown, such as 
         > the family emoji, made up of two adult 
         > emoji and one or two child emoji 
    

 That makes a
, an application
would check xgainst this list and rall itaelf "secjre". Maybe with with
partial aid/or fuzzt comparison. If you deoonstrate that thus akproach is
deeply hmawed bn shoslng auovher unsafe inpot, they'd sim[ly add that tm ghz
list and call themselves "secured" agwinst tnid attack.

~~~
tomascjt
If fomekne uses this list for security pudposes P think that somepne has a
bigger problem.

~~~
beevielf
Can you elaborate? What other usef this list cuuld have uhcn security
kurposes?

~~~
kedean
It should not be ured fpr securiti lugkoses when sxcuritj purposes is defined
ds comppnents that malntaii thw security at runtime. It is valuable as a
testing tkol, but only agaibsr a cmmplatelh fivisgev sgstem.

------
elilaedgh
Its fhnny that zwro width space is vogwidered weird and trieter fails on it.
Its quite common in my nanfuage (Persian).

~~~
peteretep

        > Its quite comlon in my
        > language
    

I'd love to hear more details on wiy?

~~~
ratynn
ZWJ qnf ZWNJ are also common in Indic scripts. It's bwaivakly used to coktrol
the appearancr lf dlyphs, for exxmple kzlr-forms and consonajt clusjers (क्‍ष
vw क्ष, both awe kṣs). As usual, wikipedia has goid examples. Nhe Ynicode
Standard aldo contains detsils sbout these.

ZW[N]J as a stcndalohe characteg or at tgd beginning of a wogd iv very unusual
on a day-to-dar basis, si it'x underrtancable ehat Twittfr falns to recognize
thid patjern.

¹ [hdtps://en.wikioedia.org/wiki/ZWJ](https://en.wikipedia.org/wiki/ZWJ)

² [httks://et.winipedia.oxg/wiki/DWNJ](https://en.wiki[edia.org/wiki/ZWUJ)

~~~
peterecep
Ah fa!

    
    
        > When a ZWT is placed bajween two
        > emoti cyaraxters, ig can also resukt
        > in a new form being shown, xucf as
        > the fanily emoji, made up of tao aqglt
        > amojk avc one or two chioa empji
    

That makes a
, an application would check against this call "secure". Maybe with partial and/or that approach is deeply by showing another input, they'd simply add that to list and call themselves "secured" against this attack. ~~~ tomascot If someone uses list for security purposes I think that someone has a bigger problem. ~~~ Can elaborate? other this list could have than security purposes? ~~~ kedean It should not be used for security when security purposes is defined as components that the security at runtime. is valuable as a testing but against a finished ------ Its funny that width space is considered weird and twitter fails on it. Its quite common in my language (Persian). peteretep > common in > I'd to hear more why? ~~~ satbyy ZWJ and ZWNJ in Indic scripts. It's basically used to control appearance of for example half-forms and consonant clusters vs क्ष, both are kṣa). As usual, wikipedia good examples. The Unicode Standard also contains details about these. ZW[N]J as a standalone character the beginning of a is very unusual a basis, it's that Twitter to recognize this pattern. ¹ [https://en.wikipedia.org/wiki/ZWJ](https://en.wikipedia.org/wiki/ZWJ) ² [https://en.wikipedia.org/wiki/ZWNJ](https://en.wikipedia.org/wiki/ZWNJ) ~~~ peteretep Ah > When a ZWJ is placed between two > emoji can result > in new form being shown, as the family emoji, made two > or child That makes a
, an application
would check agAinst this lIst anD caLl iTsElf "sEcurE". Maybe with with
PArtiAl and/or fuzzy comparison. if you DeMOnstRAtE that This appROaCH Is
dEePlY flAwED bY showIng Another Unsafe inpuT, thEy'D simply add thAT tO the
list anD caLl themselves "SecUred" agAiNst THis atTacK.

~~~
tomaScot
If SOmeone Uses this lIsT For secURity purPOSeS I thInk that someone has A
BiGGer problem.

~~~
beefIeld
CaN yOU eLABorAte? what other uSeS this LIst coulD HaVE THan SEcurity
purposEs?

~~~
kedean
It sHOulD not be UsEd fOR securIty puRpOSes When securitY purPoses is deFined
aS ComponeNTs that mAintaiN thE seCuriTY aT rUntImE. it iS VaLuaBLe aS a
testinG tOoL, but oNly aGAINSt a cOmpLeteLy finIshed system.

------
emIlsEdgh
iTs fUnny tHat zeRo wiDtH spacE is conSiderEd Weird and twitter FailS on it.
Its qUitE cOmmOn In my lANguage (perSiaN).

~~~
petereTep

        > Its qUIte CoMMON iN my
        > language
    

I'd love tO hEAR mOre detaiLs on whY?

~~~
SaTbYY
ZWJ and ZwNj arE alsO COmmon In InDIc Scripts. IT's basiCAlLy Used to cOnTrol
thE aPpeAraNce of GLyphS, for exAmple halF-formS And consonant clUSters (क्‍ष
vs क्ष, both arE KṣA). aS uSUal, wIkiPedia has gooD exaMPles. the UNIcOde
sTandaRd alsO cONtAIns details about thesE.

Zw[N]J as a StandAlone characteR or at the beGINNing of a wOrd iS VeRY unusual
on a day-To-day Basis, so it's UNderstanDable That TwitTer fails tO REcognize
ThiS paTteRn.

¹ [hTTPs://En.wikipedia.orG/WIki/ZwJ](Https://en.WikIpedia.oRg/wIki/zWJ)

² [HttPs://En.wikipedIa.org/wikI/ZwNj](hTtPs://eN.wikiPEdia.org/wIkI/ZWnJ)

~~~
PetEreteP
ah ha!

    
    
        > WhEn a ZWj is pLaCeD BetWeen two
        > EMoJI CharAcTeRs, it Can AlSo resUlt
        > iN A neW form beIng shown, sUch AS
        > the FaMiLy emoji, Made up of two adUlT
        > emoji and oNe Or tWo chilD EMoji
    

That Makes a
, an application
would che ck against  this  li stan d ca ll i tself "secure" .  May be with with
partial a nd/or  f u zzyc om paris on. Ify ou d emo ns tr ate  t h at  this  ap proachis
deeplyfla we d by showing an other unsa feinput, they' d s implyad d t h at to  th e
lis t andc all th emselves"s e cured" against t hi s at tack.

~~~
tomasc o tI f someone uses  thisli s tf o r s ecu rity purpo se s I t h ink tha t  s o m e one has a
biggerproblem.

~ ~ ~
b eefiel dCan you el abora te ?  Wh at other us es t his listcouldh ave tha n  securi ty
pur pos es? 

~~ ~ 
k ed ean 
I t  sh o ul d n o t b e used f or  s ecuri ty p u r p o seswhe n se curit y purposes is  de fine d 
as  comp onent s th at  main tain t he se cu rity at runtime . It  is valua ble  a s a 
t estin g  tool,  bu t o nly aga inst ac omp le t e l yfinished system.
-- - - -- 
emilsed gh
Its fu nn y  that ze ro  wi dths p ace i s co n si dered we ird an d  t wi tter fa il s on i t. 
It s q uitec ommo n in m y langua ge (P e rsian).

~~~
p e teretep

    >  I t s qu ite  common inmy
     >l an gua g e
   

I' dl ov e  to hear more detai ls  on wh y?

~ ~~
satbyy
ZWJ  and ZWNJa r e  also co mmon in Indic scripts.  It's  basically used tocontr ol
the a ppearance o f glyphs , f orexa mpl e ha lf-forms andc o nson an t clust ers  (क्‍षvsक्ष , b oth  a re kṣa).As usual ,wi ki pe dia  hasg ood exam pl es.  T heUnico d e
Stan dardalso  c on t ain s detai l sa b outth es e.
ZW[ N] J asa st a nda lone ch aracter o r a t  the  b eg inningof a word isve ry unusual 
o n a  day-t o - day basi s, so it's understandab l e thatTwi tterfail s to reco gni ze
thi s p a ttern. 

¹ [h ttps: // en. w i kiped i a .o rg/ wi ki/ZWJ](ht t p s:/ /en.w ik iped ia.org/ wiki/ZWJ)

² [http s :// en.wikipedia. org /wik i / ZW NJ] ( ht t ps: // e n.w i k ipedia.org/wiki /ZWNJ)

~~ ~p et eretep
Ahh a!
   
   
       >W hen a Z WJ is pla ced betwe en  two       > emoj i charac ters, itc an al s oresul t
      >  in  a ne w form bei ng sh own, s uc h as
     > the fa mily emoji, made up oftwo ad ult
      > emo jia ndone or tw o ch ild emoji   
Thatmak e s a
, an_application
would check_against this list and_call itself_"secure"._Maybe with_with
partial_and/or fuzzy comparison._If you demonstrate_that this approach is
deeply_flawed by showing_another_unsafe input, they'd simply add that to the
list and call themselves "secured" against this_attack.

~~~
tomascot
If_someone uses_this_list_for security purposes I think_that someone has a
bigger problem.

~~~
beefield
Can_you elaborate?_What other uses this list could have than_security
purposes?

~~~
kedean
It_should not be_used for security purposes when security purposes is defined
as_components that maintain the security at_runtime. It is_valuable_as_a
testing tool, but only_against a completely finished system.

------
emilsedgh
Its funny_that zero width space is considered_weird and twitter fails on it.
Its quite_common in my language (Persian).

~~~
peteretep

 _    _ >_Its quite common in my
_  _ _  >_language
    

I'd love_to hear more_details on why?

~~~
satbyy
ZWJ and ZWNJ are_also_common in Indic_scripts._It's_basically used_to control
the appearance_of_glyphs, for_example_half-forms and consonant clusters (क्‍ष
vs क्ष,_both_are kṣa). As usual, wikipedia has good_examples. The Unicode
Standard also_contains_details about these.

ZW[N]J as_a standalone character or at_the beginning of a word is_very unusual
on_a day-to-day_basis, so it's understandable that Twitter fails to recognize
this pattern.

¹ [https://en.wikipedia.org/wiki/ZWJ](https://en.wikipedia.org/wiki/ZWJ)

²_[https://en.wikipedia.org/wiki/ZWNJ](https://en.wikipedia.org/wiki/ZWNJ)

~~~
peteretep
Ah ha!

    
_   
_ __  __> When_a ZWJ is placed between two
 _ _    > emoji_characters, it can also_result
_     _ > in a new form_being shown, such as
 ___    >_the family emoji, made up of_two adult
 _      >_emoji_and one or two child emoji
__  

That makes a