• OpenPGP

OpenPGP

OpenPGP encryption and signing tool

Encrypt - decrypt

   1 gpg --version # gpg (GnuPG) 1.4.23
   2 echo "aaa" > test.txt
   3 gpg --symmetric text.txt # creates encrypted file test.txt.gpg
   4 gpg --output x.txt --decrypt test.txt.gpg
   5 diff test.txt x.txt

Send file encrypted with symmetric key by email in CentOS 6.3

• /usr/bin/gpg-agent --daemon /usr/bin/gpg --yes --batch --passphrase symmetricPass -c file.txt

• /bin/cat /root/file.txt.gpg | /bin/mail -s "subject xyz" mail.me@example.net

• gpg --version # gpg (GnuPG) 2.0.14

Decrypt file encrypted with symmetric key in CentOS 6.3

• gpg-agent --daemon gpg --yes --batch --passphrase symmetricPass bh.file.txt.gpg

Decrypt file encrypted with symmetric key in Slackware 14

• gpg --passphrase symmetricPass file.txt.gpg
• gpg --version # gpg (GnuPG) 1.4.12

Install pass command

• https://www.passwordstore.org/

the standard unix password manager (~/.password-store/)

   1 sudo apt install pass
   2 pass init "userx password storage key"
   3 gpg --full-generate-key # 1 3072 0 
   4 Real name: userx
   5 Email address: userx@bitarus.allowed.org
   6 Passphrase: ********
   7 gpg --list-keys
   8 pass init 999999999999999999999999a9aa9a9a9a99a
   9 pass add svc/user
  10 pass add svc/pwd
  11 pass list

Post Quantum Computing

• ML-KEM (Kyber)
  • ML-KEM-512
  • ML-KEM-768
  • ML-KEM-1024

   1 sudo apk add openssl 
   2 gpg --full-generate-key 
   3 gpg --armor --export bob@example.com > bob.asc
   4 gpg --import bob.asc # import pub key
   5 echo "hello" > report.txt
   6 gpg --encrypt --recipient bob@example.com report.txt # report.txt.gpg
   7 gpg --decrypt report.txt.gpg > report1.txt

• BIP-39 mnemonic phrases ML-KEM 768 , ML-KEM 1024
• PGP word list
• Diceware
• Mnemonic encoding 256 word dictionary