For start to keep things clean and not scare people dont dont know whats up - DashCoin is NOT DASH
Monero, Bytecoin, DashCoin, DigitalNote are coins based on CryptoNote, they are forks.

## XMR team has found a bug in the code some time ago allowing to create unlimited free coins in this technology.
They patched it and let other coins know. Aeon, Boolberry and Forknote are updated now along with XMR.

## BCN DSH XDN still didnt update and news of the vulnerability are now public.

http://i.imgur.com/rqXo2iN.png

## Mitigation (quote if the original article gets edited)
> Several options exist for mitigation. The simplest, least invasive is noted below.

> To mitigate, check key images for correctness by multiplying by the curve order l. Check that the result is the identity element.

> Hexadecimal values of each:

> Identity element = "0100000000000000000000000000000000000000000000000000000000000000"
Curve order (little endian) = "edd3f55c1a631258d69cf7a2def9de1400000000000000000000000000000010"
For each transaction key image, check ((key image * curve order) == (identity element)); reject transaction if false.Several options exist for mitigation. The simplest, least invasive is noted below.
To mitigate, check key images for correctness by multiplying by the curve order l. Check that the result is the identity element.
Hexadecimal values of each:
Identity element = "0100000000000000000000000000000000000000000000000000000000000000"
Curve order (little endian) = "edd3f55c1a631258d69cf7a2def9de1400000000000000000000000000000010"
For each transaction key image, check ((key image * curve order) == (identity element)); reject transaction if false. 

## Mentioned Coins Pumping
http://i.imgur.com/alW4w0r.png
http://i.imgur.com/doQr8Wl.png
http://i.imgur.com/YUkesKk.png

## I suggest waiting for patches to be confirmed by devs.

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