News
Understanding the Backbone:Bitcoin’s Network Security
Bitcoin, the pioneer of cryptocurrencies, has captured the imagination of individuals, investors, and institutions worldwide. Beyond its revolutionary potential as a digital currency, Bitcoin’s network security is the bedrock upon which its trustworthiness and success rest. This complex topic is well-explained in this article, where we will delve deep into the intricate world of Bitcoin’s network security, exploring the cryptographic underpinnings, consensus mechanisms, potential threats, and the evolution of security measures. Along the way, readers will also learn about investments, further enhancing their understanding of Bitcoin’s significance in the financial landscape.
The Bitcoin Network: A Decentralized Ledger
At its core, Bitcoin functions as a decentralized ledger that records all transactions. Unlike traditional banking systems, it does so without relying on a central authority. Instead, a distributed network of nodes collaboratively maintains the blockchain, the public ledger containing all Bitcoin transactions.
Miners play a pivotal role in this process by verifying transactions and adding them to the blockchain. They compete to solve complex mathematical puzzles, a process known as mining, and are rewarded with newly created Bitcoins and transaction fees. This decentralized nature of the network enhances security, making it resistant to single points of failure and censorship.
Cryptography: The Foundation of Bitcoin Security
Cryptography is the cornerstone of Bitcoin’s security. Users are equipped with pairs of cryptographic keys: public and private keys. The public key is akin to a user’s account number, while the private key functions as their password. These keys ensure the security and privacy of transactions.
Transactions are further secured through cryptographic hash functions. A hash function takes an input and produces a fixed-length string of characters, which is unique to that input. These hashes are used to create a chain of blocks, each block containing a set of transactions. Any alteration of a single transaction within a block would require the modification of every subsequent block, making the blockchain highly resistant to tampering.
Consensus Mechanisms: Preventing Double Spending
One of Bitcoin’s most critical security features is its consensus mechanism, the proof-of-work (PoW) algorithm. PoW ensures that the network agrees on the order and validity of transactions, preventing double-spending – a problem that has plagued digital currencies in the past.
Miners compete to find a nonce, a number that, when combined with the transaction data and the previous block’s hash, produces a specific target hash. This competitive process requires significant computational power, making it costly for malicious actors to manipulate the blockchain. The first miner to discover the correct nonce gets to add a new block to the chain.
Network Attacks and Vulnerabilities
Despite its robust design, the Bitcoin network is not impervious to threats. Several attack vectors, including 51% attacks, Sybil attacks, and Distributed Denial of Service (DDoS) attacks, pose potential risks.
A 51% attack occurs when a single entity controls more than 50% of the network’s mining power, allowing them to manipulate transaction history. Sybil attacks involve an attacker creating a large number of fake nodes to disrupt network consensus. DDoS attacks aim to overwhelm network nodes with traffic, causing temporary disruptions.
To counter these threats, Bitcoin employs a combination of economic incentives, network monitoring, and software upgrades to maintain network integrity.
Evolution of Bitcoin Security
Bitcoin’s journey has been marked by numerous security incidents and lessons learned. From early vulnerabilities to exchange hacks, the community has continually adapted to enhance the network’s security. Software upgrades like Segregated Witness (SegWit) and the implementation of the Lightning Network have addressed scalability and security concerns, marking significant milestones in Bitcoin’s evolution.
The vigilant efforts of the developer community, security researchers, and exchanges have collectively contributed to Bitcoin’s robust security posture.
Beyond Bitcoin: Implications for the Future
Bitcoin’s security model has set a precedent for the broader cryptocurrency space. Many newer cryptocurrencies have adopted similar consensus mechanisms and cryptographic techniques to ensure security. As the cryptocurrency ecosystem expands, security remains a paramount concern.
Regulators and governments are also becoming increasingly involved in shaping the security landscape. While some see government oversight as necessary for consumer protection, others advocate for maintaining the decentralized and trustless nature of cryptocurrencies.
Conclusion
In conclusion, Bitcoin’s network security is the linchpin of its success and trustworthiness. Its decentralized ledger, cryptographic foundations, PoW consensus mechanism, and vigilant defense against network threats make it a resilient and secure digital currency. As the cryptocurrency space continues to evolve, understanding the backbone of Bitcoin’s network security is crucial for both investors and enthusiasts. The lessons learned from Bitcoin’s journey will undoubtedly shape the future of blockchain technology and digital finance.
Farming
Basic Payment Scheme 2025 balance paid to 95% of Welsh farmers
Final year of BPS as transition to Sustainable Farming Scheme begins
The WELSH Government says more than ninety-five per cent of farm businesses have now received their full or balance payment under the final year of the Basic Payment Scheme (BPS), ahead of the introduction of the new Sustainable Farming Scheme (SFS) in 2026.
Announcing the update on Friday (Dec 12), Deputy First Minister and Cabinet Secretary for Climate Change and Rural Affairs, Huw Irranca-Davies, confirmed that over 15,400 Welsh farm businesses have been paid £68.7m. This comes on top of the £160m issued in BPS advance payments since 14 October.
Final round of BPS payments
The Basic Payment Scheme, which has been the backbone of farm support in Wales for a decade, provides direct income support to help farmers plan and manage their businesses. BPS 2025 marks the last year in which full BPS payments will be made before the scheme begins to be phased out.
The Cabinet Secretary said officials would “continue to process the outstanding BPS 2025 claims as soon as possible,” adding that all but the most complex cases should be completed by 30 June 2026.
Payments issued today represent the main balance due to farmers following earlier advances, giving many businesses the cash flow they need during the quieter winter period—traditionally a challenging time in the agricultural calendar.
Shift to Sustainable Farming Scheme in 2026
From 1 January 2026, the Welsh Government will begin rolling out the Sustainable Farming Scheme, a major reform to how agricultural support is delivered. The SFS will reward farmers for environmental outcomes such as habitat management, carbon reduction and biodiversity improvements, alongside continued food production.
The government has argued that the new scheme is essential to meeting Wales’ climate and nature targets while ensuring long-term resilience in the sector. However, the transition has been closely watched by farming unions, who have raised concerns about the administrative burden, income stability, and the speed at which BPS is being phased out.
Mr Irranca-Davies reaffirmed the government’s stance, saying: “This government is steadfastly committed to supporting Welsh farmers to sustainably produce quality food. This is demonstrated today in our payment of the BPS 2025 balance payments and will continue throughout the transition period.”
Sector reaction
Farming unions are expected to scrutinise the detail of today’s announcement, particularly around remaining unpaid cases. Last year, late payments led to frustration in parts of the sector, with unions calling for greater certainty as the industry faces rising input costs, supply chain pressures and continued market volatility.
The move to the SFS remains one of the most significant agricultural policy changes in Wales since devolution. Ministers insist the shift is designed to support both food production and environmental stewardship, while critics warn the transition must not undermine farm viability—especially for family-run livestock farms that dominate rural areas such as Pembrokeshire, Ceredigion and Carmarthenshire.
What happens next
Farmers still awaiting their BPS 2025 balance will continue to be processed “as soon as possible”, the Welsh Government said. Officials will also publish updated guidance on the Sustainable Farming Scheme ahead of its launch.
The coming year will therefore become a pivotal moment for Welsh agriculture, as the long-standing BPS framework—which provided over £200m annually to Welsh farmers—makes way for a new results-based model that will shape the industry for decades to come.
News
Improved train timetable launches across Wales
Extra services, later trains and boosted Sunday routes as £800m rail investment takes effect
An improved train timetable has come into force across Wales today (Sunday, 14 December), with Transport for Wales (TfW) introducing more frequent services, stronger connections and additional late-night trains on key routes.
The winter timetable update brings one of the most substantial uplifts in recent years on the Wales and Borders network, forming part of the Welsh Government’s ongoing £800 million investment in brand-new rolling stock and reliability improvements.
More trains and later journeys
Among the upgrades, passengers will see:
- A new hourly additional service between Chester and Wrexham, effectively doubling the frequency on one of the region’s busiest commuter corridors.
- An extra train in each direction every day on the Heart of Wales line between Swansea and Shrewsbury.
- Three later last trains from Cardiff to Treherbert, Aberdare and Merthyr Tydfil, supporting shift workers and the night-time economy.
- A new hourly Sunday service on the Coryton line in Cardiff.
Cabinet Secretary for Transport and North Wales, Ken Skates, said improved connectivity was “absolutely vital” for economic growth and passenger confidence.
“These changes will make a real difference to customers, who will benefit from more services and greater connectivity,” he said. “This has been made possible by our £800m investment in brand-new trains for the Wales and Borders network.
“We will see the doubling of trains between Wrexham and Chester and a later service from the capital to valley communities. In South Wales, people will continue to benefit from simpler, fairer fares through TfW’s Pay As You Go service, and its forthcoming introduction in North Wales will help even more passengers access easy, transparent pricing.”
Full details of the updated timetable are available at: tfw.wales/service-status/timetables
News
Wrecked guard boat still under watch off north Pembrokeshire coast
Tidal changes monitored after dramatic early-morning rescue
A GUARD VESSEL that ran aground off the north Pembrokeshire coast in the early hours of Thursday morning (Dec 11) remains under close observation as tides continue to shift.
The Resolute, a 24-metre guard boat understood to be working for an offshore wind project off the Irish coast, had been sheltering in worsening weather when she was pushed onto rocks near Aber Hywel, Dinas, shortly after 3:25am.
Four crew members were onboard when the vessel grounded in rough seas and a strong southerly wind.

Major rescue effort launched
The crew issued an emergency alert, prompting a full multi-agency response.
A coastguard rescue helicopter, both Fishguard RNLI lifeboats, and coastguard teams from Fishguard and St Davids were sent to the scene.
Turbulent air made a winch rescue impossible and Fishguard’s all-weather lifeboat was unable to get close due to cliffs and submerged hazards. The inshore lifeboat was instead deployed to attempt a transfer in extremely challenging conditions.
During the evacuation, the third crew member descending to the vessel’s life raft slipped, fell into the water and was swept away. Speaking afterwards, RNLI crew member Cedwyn Rogers said the team immediately switched into “hyper-focused” mode as training took over.
Despite the casualty drifting, helm Warren Bean — a volunteer with more than 30 years’ RNLI experience — manoeuvred the lifeboat alongside, allowing crew to haul the man to safety. The remaining crew member was then retrieved, and all four were taken aboard the all-weather lifeboat and brought ashore to Fishguard.
All rescue units were later stood down.
Vessel still stranded and taking on water
The Herald understands that the Resolute remained aground on the rocks yesterday and was taking on water. The crew were later assisted back onboard by a local fisherman to assess damage on behalf of the vessel’s operators.
Management representatives from Ireland were due to arrive to draw up a recovery plan, including arrangements to remove fuel to prevent any potential environmental impact.
Further inspections have been taking place today as the team evaluates the next steps.
Coastguard statement
A spokesperson for HM Coastguard said: “At 3.28am on Thursday morning, HM Coastguard was made aware of a vessel with four persons onboard aground on rocks at Fishguard, Pembrokeshire. RNLI lifeboats and coastguard rescue teams from Fishguard and St Davids were sent to the scene. The four people aboard were rescued by lifeboat, and the helicopter was stood down. The vessel, which is still aground, is being monitored as tidal conditions change.”
-
Crime5 days agoPhillips found guilty of raping baby in “worst case” judge has ever dealt with
-
Crime4 days agoKilgetty scaffolder sentenced after driving with cocaine and in system
-
Crime4 days agoHousing site director sentenced after failing to provide breath sample following crash
-
Crime4 days agoMotorist banned for three years after driving with cannabis in system
-
Education3 days agoTeaching assistant struck off after asking pupil for photos of her body
-
News6 days agoJury retires tomorrow in harrowing Baby C rape trial
-
Crime4 days agoMilford Haven pensioner denies exposure charges
-
Local Government6 days agoNew defamation row erupts after anonymous website targets Herald editor
