TY  - GEN
UR  - https://doi.org/10.1145/2810103.2813655
PB  - Association for Computing Machinery (ACM)
N2  - Given the increasing adoption of Bitcoin, the number of transactions and the block sizes within the system are only expected to increase. To sustain its correct operation in spite of its ever-increasing
use, Bitcoin implements a number of necessary optimizations and
scalability measures. These measures limit the amount of information broadcast in the system to the minimum necessary.
In this paper, we show that current scalability measures adopted
by Bitcoin come at odds with the security of the system. More
specifically, we show that an adversary can exploit these measures
in order to effectively delay the propagation of transactions and
blocks to specific nodes?without causing a network partitioning
in the system. We show that this allows the adversary to easily
mount Denial-of-Service attacks, considerably increase its mining
advantage in the network, and double-spend transactions in spite of
the current countermeasures adopted by Bitcoin. Based on our results, we propose a number of countermeasures in order to enhance
the security of Bitcoin without deteriorating its scalability.
ID  - discovery10182349
A1  - Gervais, Arthur
A1  - Ritzdorf, Hubert
A1  - Karame, Ghassan O
A1  - Capkun, Srdjan
CY  - Denver, CO, USA
AV  - public
SP  - 692
Y1  - 2015/10/12/
EP  - 705
TI  - Tampering with the Delivery of Blocks and Transactions in Bitcoin
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
ER  -