Examples of human irrationality

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June 27, 2015

My brother attended a service academy, and their books were just "issued" to them for free. At the end of the year, tons of students threw theirs out. My brother snatched some of the valuable ones up, sold them on amazon, and bought himself a flatscreen TV and a PS3. Another friend of mine collected up all the old edition books at our school, and then went and sold them back at other university bookstores in the area that hadn't switched editions or were offering more money.smuphil

I work at a school and at the end of the year there are just stacks of books the kids leave out to be thrown out.

I bought a $300 Sonos speaker with the sales of them this year.

jeobleo

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Microsoft is trying to get my phone number - they force me to give my phone number and warn me if I refuse, then I will lose access to my Outlook (Hotmail) account

September 11, 2013

When I tried to login into my Outlook account (also known as "Microsoft Acccount" or "Hotmail account") I got this ultimatum:

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June 12, 2013

Do not use (only) flash memory (SSD drives, hardware wallets, USB flash drives) for your precious private keys!

August 06, 2017

Flash memory is not a reliable medium for archives. Especially when there is no regular power. I have personal experience with usb flash drive not powered for weeks - one file became corrupted . (Read more here: Archiving private keys - TLDR version. ) You should always back up on paper and other mediums. Flash memory is prone to failure if it is not powered for weeks or more and if there are ionizing radiation When you write your precious private keys you should use technologies like Parchive and ZFS . And make several copies of your files. It's OK if you use your USB flash drive for another backup, but don't rely on it! Always back up on DVDs (even small files!), paper and online (after encryption with CPU and RAM intensive key derivative function like scrypt). Here is example of using the scrypt utility: $ sudo apt-get install scrypt $ scrypt enc -M 1073741824 -t 200 secret.txt encrypted.scrypt Do not use default values of "-M" and "-t", they...

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June 18, 2013

Archiving private keys - TLDR version

August 07, 2017

0. Make multiple encrypted copies. On DVDs (they are better than CDs and Blu-Ray discs; DVD+R are better than DVD-R), paper, cloud services like DropBox, OneDrive, Google Drive, e-mail it to yourself and to your friends, use P2P storage services like MaidSafe, Storj and Sia , etc. 1. Use proper font when printing PGP encrypted keys on paper. 2. Flash memory (SSD, USB flash drives, hardware wallets) is less reliable when not powered regularly (i.e. every week). 3. Use error correction methods like Parchive and ZFS. 4. Print on paper or store on digital media only encrypted data. 5. Your encryption software should use CPU/RAM-intensive KDF (i.e. scrypt with secure options - do not use defaults! ). First, encrypt with scrypt and then encrypt it again with PGP (using different password!) in ASCII armor mode before print it (other methods like QR codes may not be reliable as multiple copies of the PGP ASCII armor). Do not use the same password for the PGP because it's easy to brute...