<s>
GNU	B-Application
Taler	I-Application
is	O
a	O
free	O
software-based	O
microtransaction	O
and	O
electronic	O
payment	O
system	O
.	O
</s>
<s>
Unlike	O
most	O
other	O
decentralized	O
payment	O
systems	O
,	O
GNU	B-Application
Taler	I-Application
does	O
not	O
use	O
a	O
blockchain	B-Application
.	O
</s>
<s>
It	O
has	O
vocal	O
support	O
from	O
GNU	B-Application
Project	I-Application
founder	O
Richard	O
Stallman	O
.	O
</s>
<s>
In	O
a	O
paper	O
published	O
in	O
Security	O
,	O
Privacy	O
,	O
and	O
Applied	O
Cryptography	O
Engineering	O
,	O
GNU	B-Application
Taler	I-Application
is	O
described	O
as	O
meeting	O
ethical	O
considerations	O
–	O
the	O
paying	O
customer	O
is	O
anonymous	O
while	O
the	O
merchant	O
is	O
identified	O
and	O
taxable	O
.	O
</s>
