  The rise of ubiquitous deepfakes, misinformation, disinformation, propaganda
and post-truth, often referred to as fake news, raises concerns over the role
of Internet and social media in modern democratic societies. Due to its rapid
and widespread diffusion, digital deception has not only an individual or
societal cost (e.g., to hamper the integrity of elections), but it can lead to
significant economic losses (e.g., to affect stock market performance) or to
risks to national security. Blockchain and other Distributed Ledger
Technologies (DLTs) guarantee the provenance, authenticity and traceability of
data by providing a transparent, immutable and verifiable record of
transactions while creating a peer-to-peer secure platform for storing and
exchanging information. This overview aims to explore the potential of DLTs and
blockchain to combat digital deception, reviewing initiatives that are
currently under development and identifying their main current challenges.
Moreover, some recommendations are enumerated to guide future researchers on
issues that will have to be tackled to face fake news, disinformation and
deepfakes, as an integral part of strengthening the resilience against
cyber-threats on today's online media.
