<s>
HashClash	B-Operating_System
was	O
a	O
volunteer	B-Operating_System
computing	I-Operating_System
project	O
running	O
on	O
the	O
Berkeley	B-Operating_System
Open	I-Operating_System
Infrastructure	I-Operating_System
for	I-Operating_System
Network	I-Operating_System
Computing	I-Operating_System
(	O
BOINC	B-Operating_System
)	O
software	O
platform	O
to	O
find	O
collisions	O
in	O
the	O
MD5	B-Algorithm
hash	I-Algorithm
algorithm	O
.	O
</s>
<s>
It	O
was	O
based	O
at	O
Department	O
of	O
Mathematics	O
and	O
Computer	B-General_Concept
Science	I-General_Concept
at	O
the	O
Eindhoven	O
University	O
of	O
Technology	O
,	O
and	O
Marc	O
Stevens	O
initiated	O
the	O
project	O
as	O
part	O
of	O
his	O
master	O
's	O
degree	O
thesis	O
.	O
</s>
<s>
However	O
SHA1	B-Algorithm
was	O
added	O
later	O
,	O
and	O
the	O
code	O
repository	O
was	O
ported	O
to	O
git	O
in	O
2017	O
.	O
</s>
<s>
The	O
project	O
was	O
used	O
to	O
create	O
a	O
rogue	O
certificate	B-Architecture
authority	I-Architecture
certificate	O
in	O
2009	O
.	O
</s>
