Tarsnap Backup Inc.

I just released Tarsnap version 1.0.41. This contains mitigations for a chosen-plaintext attack against Tarsnap's chunking algorithm which can leak its secret parameters.

Release announcement: mail.tarsnap.com/tarsnap-announ… Blog post: daemonology.net/blog/2025-03-2… Paper: Should be on the Cryptology ePrint archive soon; I'll post when it's up.

Because we want to protect the most vulnerable members of our community, @BSDCan is requiring face masks this year. Because I know people will forget, @Tarsnap is exercising its Silver sponsorship to include "vendor swag" in the tote bags: Two KN95 masks per person.

Just updated the @tarsnap .deb packages to use the 2024 signing keys instead of the 2023 signing keys (which expire on 2024-02-01). If your apt-get is now breaking, you forgot to install (or update) the tarsnap-archive-keyring package.

Tarsnap's Black Friday sale is live! For an unlimited time, you can get three tools which I wrote for Tarsnap's internal use -- kivaloo, scrypt, and spiped -- for the low price of $0.00! tarsnap.com/open-source.ht…

Blog post: @tarsnap has given 2^18 dollars to open source: daemonology.net/blog/2023-10-2…

Just released scrypt-1.3.2: mail.tarsnap.com/scrypt/msg0027…

Added some details about outages to the @tarsnap website: tarsnap.com/infrastructure… To save you a click: 99.93% uptime since 2008; slightly higher over the past 5 years.

Tarsnap outage post-mortem: mail.tarsnap.com/tarsnap-announ…

Tarsnap is back online. mail.tarsnap.com/tarsnap-announ…

Tarsnap is offline due to a hardware failure. I'm working on bringing it back. All your data is safe, just temporarily inaccessible. mail.tarsnap.com/tarsnap-announ…

Donated $1000 to support Glen Barber's work on FreeBSD. He's an excellent release engineer and works incredibly hard to keep the project running smoothly. I hope other companies using FreeBSD will also contribute. gofundme.com/f/gjbbsd

Our annual Ottawa developer summit would not be possible without the generous support of sponsors; the #FreeBSD Foundation would like to thank @Tarsnap for their gold-level sponsorship. wiki.freebsd.org/DevSummit/2023…

If any Tarsnap users are affected by the SVB meltdown, just send me an email and I'll be happy to make sure your data is safe despite liquidity issues. I just need to know that there's a problem and you still want to keep your data.

Since I've been asked: @Tarsnap has no direct exposure to Silicon Valley Bank, and as far as I'm aware has no indirect exposure either. It's business as usual here.

@Tarsnap has joined as a silver sponsor. Thanks a lot, @cperciva!

Sign up for Michael Lucas' mailing lists and get a free (digital) copy of his Tarsnap Mastery book. Seriously, do it. It's a great book.

For the record, @tarsnap is not presently hiring. If you recently received an email from "me" saying that I want to hire you: Sorry, it wasn't from me.

Tarsnap now has experimental amd64 binary packages for Ubuntu 22.04 "jammy". Ubuntu made some compatibility-breaking changes in 22.04 so it took a while for us to get these ready (usually supporting a new Linux is very quick). mail.tarsnap.com/tarsnap-users/…

Does any product in the world have a better collection of testimonials than Tarsnap? Imagine getting a testimonial from Robert Morris. It's hard to get even a yes/no answer out of him. tarsnap.com/testimonials.h…