At this workshop you’ll learn to create passphrase-protected files using OpenSSL, a command-line program that’s probably already installed on your computer. With this technique you can send encrypted files via email/Dropbox, then share the passphrase with the recipient on a secure channel (e.g., Signal). Useful for avoiding surveillance & data mining!

Save message:
echo "My secret message ❤️" > example.txt

Encode:
openssl aes-256-cbc -a -in example.txt -out message.enc.txt

Decode:
openssl aes-256-cbc -d -a -in message.enc.txt -out plain-text.txt

Register

Name/pseudonym:

Email address:

Email

Confirm Email

Choose one:

• I'll bring a laptop
• I'll use a lab computer

Instructor donation:$0 / donate later$5$10$1520

(recommended $5–$10, notaflof)

Credit card info: *

Card

Name on Card

Comments or questions?

Submit

Photo CC-BY-SA Mark Dickson