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Dangerzone, a new open source tool that First Look Media just released at the Nullcon 2020 hacker conference in Goa, India, aims to solve this problem. You can install dangerzone on your Mac, Windows, or Linux computer, and then use it to open a variety of types of documents: PDFs, Microsoft Office or LibreOffice documents, or images. Even if the original document is dangerous and would normally hack your computer, dangerzone will convert it into a safe PDF that you can open and read.
When dangerzone starts containers, it disables networking, and the only file it mounts is the suspicious document itself. So if a malicious document hacks the container, it doesn’t have access to your data and it can’t use the internet, so there’s not much it could do.
DomainKeys Identified Mail (DKIM) allows a person or organisation to claim responsibility for an email message by associating a domain name with the message.
https://www.theregister.co.uk/2016/01/27/nsa_loves_it_when_you_use_pgp/, posted 2018 by peter in communication email privacy security
"To be honest, the spooks love PGP," Nicholas Weaver, a researcher at the International Computer Science Institute, told the Usenix Enigma conference in San Francisco on Wednesdy. "It's really chatty and it gives them a lot of metadata and communication records. PGP is the NSA's friend."
https://begriffs.com/posts/2018-09-18-dmarc-mailing-list.html, posted 2018 by peter in email howto spam toread
Lists should keep the From address, the Subject, and the Message totally unchanged. They should add a Sender header to indicate their relay role, and set at least the List-Id and List-Unsubscribe headers for mailbox rules and subscription management.
This configuration will allow mailing lists to function as proper SMTP citizens in the age of DMARC.
E-mail was once the pillar of the Internet as a truly distributed, standards-based and non-centralized means to communication with people across the planet. Today, an increasing number of services people rely on are losing federation and interoperability by companies who need to keep people engaged on their for-profit services. Much of the Internetâs communication is moving to these walled gardens, leaving those who want to run their own services in an increasingly hostile communication landscape.
https://blog.filippo.io/the-sad-state-of-smtp-encryption/, posted 2015 by peter in email opinion security
This is a quick recap of why I'm sad about SMTP encryption. It explains how TLS certificate verification in SMTP is useless even if you force it.
This type of STARTTLS stripping attack has mostly gone unnoticed because it tends to be applied to residential networks, where it is uncommon to run an email server2. STARTTLS was also relatively uncommon until late 2013, when EFF started rating companies on whether they used it. Since then, many of the biggest email providers implemented STARTTLS to protect their customers. We continue to strongly encourage all providers to implement STARTTLS for both outbound and inbound email. Google's Safer email transparency report and starttls.info are good resources for checking whether a particular provider does.
Gmail represents a dying class of products that, like Google Reader, puts control in the hands of users, not signal-harvesting algorithms.
Mail-in-a-Box turns a fresh cloud computer into a working mail server.
You get contact synchronization, spam filtering, and so on. On your phone, you can use apps like K-9 Mail and CardDAV-Sync free beta to sync your email and contacts between your phone and your box. And in your browser: