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A feed of the latest blog posts from major bitcoin and crypto wallet companies and developers, direct from the source.  A quick way to stay on top of the latest potential security issues, new products and current deals.

Introducing Casa Enterprise: Hold your bitcoin treasury in self-custody Does your business have a bitcoin treasury? Casa Enterprise helps your team hold keys and secure BTC on your balance sheet without relying on a custodian.
ELLIPAL - ELLIPAL Blog
Swap Now and Win Airdrop! Start from Nov 8th, we will give $2000 to random swap users. No sign-up needed. Simply swap and check your ELLIPAL wallet.More
Disclosure of hindered block propagation due to stalling peers Before Bitcoin Core v25.1, an attacker can cause a node to not
download the latest block.
This issue is considered Medium severity.
Details
When receiving a new block announcement via a headers or compact
blocks message, the delivering peer is requested either the full
block or ...
Bitcoin Core 27.2 released Bitcoin Core version 27.2 is now available for download. See the release notes for more information about the
bug fixes in this release.
If you have any questions, please stop by the #bitcoin IRC chatroom
(IRC, web) and we’ll do our best ...
Security Briefing: The top 5 bitcoin hacks of all time How do today's hacks measure up to the biggest hacks of all time? Depends on if you use fiat or BTC. Here's a look back...
8 ways to level up your bitcoin OPSEC Follow these bitcoin OPSEC tips and you’ll be safe from many common threats.
Disclosure of hindered block propagation due to mutated blocks Before Bitcoin Core v25.0, a peer sending mutated blocks could clear the
download state of other peers that also announced the block to us, which would
hinder block propagation.
This issue is considered Medium severity.
Details
Bitcoin Core treats a block as mutated when, for example, the ...
Disclosure of DoS due to inv-to-send sets growing too large Before Bitcoin Core v25.0, the per-peer m_tx_inventory_to_send sets could grow
too large to a point where sorting these sets when constructing inventory
messages would affect the node’s ability to communicate with its peers. Network
conditions in early May 2023 triggered this DoS and ...
Security Briefing: Failed custodians — where are they now? It feels like forever since FTX and other custodians went under. Have we learned anything?
Security Briefing: Can device tampering affect your bitcoin? An emerging attack vector in an international conflict has implications for bitcoin storage. Learn more in this week's briefing...
ELLIPAL - ELLIPAL Blog
Protect Your Crypto: Beware of the “Clipper” Malware A new wave of "Clipper" malware is replacing addresses during transactions. Learn how ELLIPAL's offline technology keeps your crypto safe.More
Performance and Fixes New COLDCARD Release: Versions 5.4.0 (Mk4) and 1.3.0 (Q)
Seed XOR Changes
XOR from Seed Vault (select other parts of the XOR from seeds in the vault).
This allow Restore of geographically distributed SeedXOR, without physically bringing
the ...
New COLDCARD EDGE Version Released
New COLDCARD EDGE Version Released New COLDCARD EDGE Release: Versions 5.3.3X (Mk4) and 1.2.3QX (Q)
What is EDGE?
new_edge is our newest long-lived branch that contains features that may not be ready for prime time,
such as Taproot and Tapscript, BSMS and Miniscript.
Our standards for releasing new Edge
versions ...
NFC PushTx and More Updates New COLDCARD Release: Versions 5.3.2 (Mk4) and 1.2.2 (Q)
Powerful New Feature: NFC Push Tx
This is a release with a many small bugfixes and little enhancements…
plus one major new feature: NFC Push Tx.
You can now simply tap your COLDCARD to your ...
NEW SHOW ANNOUNCEMENT: COPENHAGEN We’re pleased to announce an intimate show in Copenhagen, at Rust on September 1st! Where we will be playing 'And The Glass Handed Kites…’ in its entirety.Tickets are on-sale NOW here: https://mew.ffm.to/copenhagen2021.owe
HELSINKI AND OSLO
HELSINKI AND OSLO Due to local restrictions still in place we have rescheduled our headline shows in Helsinki and Oslo to January 2022. Tickets for the original dates will remain valid for the new dates: mew.ffm.to/live- January 27: The House of Culture, Helsinki.- ...
Bitcoin Supercycle or nah? Date of writing: 27/05/2021 & Bitcoin price: $39,600 USD/BTC or 1 sat = $0.0004 USD Every now and again I […]
SLP Bitcoin Custody Series Welcome to the Bitcoin Custody Interview Series. Hopefully you will enjoy this as a follow on from my prior Hardware […]