Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... –...
Transcript of Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... –...
![Page 1: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/1.jpg)
1
Crypto application:
PGP (Pretty Good Privacy)
![Page 2: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/2.jpg)
PGP vs GPG vs OpenPGP
• Pretty Good Privacy (PGP) written by Phil Zimmerman and released in 1991
• OpenPGP is an IETF standard with which both pieces of software are compliant
• Gnu Privacy Guard (GPG) similar software released in 1999 under the GPL open source license.– Based on the OpenPGP standards
2
![Page 3: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/3.jpg)
Security issues for E-mail• Confidentiality
– Sys Admin, Email provider can read– Could be captured and read by anyone on your LAN
• Integrity– contents could be changed by anyone on the network.
• Authenticity– Easy to insert any e-mail header: “From”– Difficult to know if it was sent by the “Sender”
![Page 4: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/4.jpg)
Targeted Attack - Recap
• Targeting a specific organization/group or person
• Email with malicious attachments– Executable– Word document
![Page 5: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/5.jpg)
Targeted AttackTo: your e-mail address
From: Fakrul Alam [email protected]
Subject: my request
Hello,
I have been looking for someone who can answer questions in the attached file. I hope you can help me.
Thanks !
![Page 6: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/6.jpg)
Example of Spoof Mail
![Page 7: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/7.jpg)
Cryptography - PGP
• PGP is based on asymmetric (public-key) encryption
![Page 8: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/8.jpg)
Asymmetric Encryption Recap
• Solves the problem of securely sharing (generating) secret keys and key explosion
• Public and private key mathematically related to each other– Cannot derive one from the other
• Encrypt with one and decrypt with the other– Encrypt with private, only public can decrypt– Encrypt with public, only private can decrypt
![Page 9: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/9.jpg)
Signing & Encrypting
• Data can be signed with private key to be verified by anyone who has the public key– Remember digital signature?– Does not always have to be hash and encrypt!
• Since public keys are also data, they can be signed too!– Digital Certificates?
![Page 10: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/10.jpg)
How PGP Works
Encrypt with receiver’s public key
Sign with sender’s
private key 🔐🔐Document Signed & Encrypted
document
🔐🔐🔐🔐
Decrypt with local private key
Verify (decrypt) with sender’s
public key
Document Signed & Encrypted document
SENDER
RECEIVER
![Page 11: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/11.jpg)
Trust
• Chain of Trust (centralized/hierarchical)– Certain globally trusted bodies sign the public keys for
everyone
• Web of Trust (decentralized)– You pick whom you trust, and decide if you trust who they
trust
• Helps verify/associate a public key to an individual
• Which one is better?
![Page 12: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/12.jpg)
Sample Web of Trust
Alice
Bob
Eve
Tashi
Carlos
• You can share your “trust-information” by publishing someone’s public key with your PGP sign – signed with your private key
![Page 13: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/13.jpg)
PGP by GnuPG
• Create your keys– Public and Private keys
• Identify a key by– Key ID (like 0x23AD8EF6)
• Verify someone’s public key by– Key fingerprint
• Find public keys on public key servers– Like http://pgp.mit.edu
![Page 14: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/14.jpg)
Key Management
• Use graphical tools– GPG Keychain for OS X– Kleopatra/GPA for Windows
• Use the command linegpg --list-keys
![Page 15: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/15.jpg)
Key Management
• On printed media– Business cards
• Digital– Email– Sneakernet
• Online– OpenPGP key servers (pgp.mit.edu)
• But does not say anything about whether you trust a key
![Page 16: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/16.jpg)
Key Management
• Make sure you specify the expiry (validity period)– Ensures that in case your private key is compromised, the
key-pair can only be used until it expires
• The expiry period can be changed anytime after creating the key
• However, before a key-pair expires, it is important you create a new key pair, sign it with the old one, and publish the signed new key to everyone in your web of trust– So that they can sign your new key
![Page 17: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/17.jpg)
Key Management - Revocation
• Used to mark a key as invalid– Either before an expiry, or– If the private key has been compromised
• Always generate a revocation certificate as soon as you create your key– Don’t keep you revocation cert together with your private
key– gpg --gen-revoke IDENTITY
![Page 18: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/18.jpg)
Key Management - Partying
• Key signing parties– To build your web of trust
• Each participant carries some form of ID, and a copy of their key fingerprint
– and maybe some 🍻🍻
• Each participant decides whether to sign someone’s keys– Based on their personal policies
![Page 19: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/19.jpg)
How PGP Works
• To check your GPG version
![Page 20: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/20.jpg)
How PGP Works
• Use “gpg --help” or “man gpg”
![Page 21: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/21.jpg)
Generate Public-Private key pair
• Create the GPG public-private key pair
• We will opt for the default algorithm: RSA and RSA
![Page 22: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/22.jpg)
Generate Public-Private key pair
• We will opt for 2048 bits
It is important to select key expiry period• You do not want a key that never expires• Many organizations operate with a 1 year key validity• Need to inform others when you change your keys
![Page 23: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/23.jpg)
Generate Public-Private key pair
• Type your name and email address– Along with the comment will be used as USER-ID
Anyone can generate keys with your email!How can you identify your key uniquely?• Fingerprint!
![Page 24: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/24.jpg)
Generate Public-Private key pair
![Page 25: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/25.jpg)
Generate Public-Private key pair
• GPG will create the key pair
Read the messages carefully and take note of the contents:• Key ID• Key Fingerprint• Expiry• User ID
![Page 26: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/26.jpg)
Generate Public-Private key pair
• List your keys:
![Page 27: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/27.jpg)
Sign data & verify
• Create a file for signing
• Sign the data (type the passphrase)
![Page 28: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/28.jpg)
Sign data & verify
• Have a look inside the signed file
![Page 29: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/29.jpg)
Sign data & verify it
• ”Good signature from” indicates that the file was signed by the private key correctly
• The “WARNING” message is because we signed it as a cleartext signature – cleartext signature is readable without any special tool– If signed as a detached signature (--detach-sign), it would
create a separate file just for the signature
![Page 30: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/30.jpg)
Export key (public)
• You can export a key to a file– for backup or further submission to public key servers
• The -a option generates the output in ASCII format
![Page 31: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/31.jpg)
Export key (public) – key server• You can either use the CLI:
– Need to specify the key ID
– You can also specify a key server
• Or submit the keys (ASCII) directly on a key server
![Page 32: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/32.jpg)
Find keys – key server
![Page 33: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/33.jpg)
Import keys (public)
• You can import keys in a file
• Or import from public key servers
• Find the imported key
![Page 34: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/34.jpg)
Verify the fingerprint
• Make sure to verify the fingerprint of every imported key
![Page 35: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/35.jpg)
Signing keys• You can sign someone’s public key (trust)
• Make sure you verify their key fingerprint and any form of identification
![Page 37: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/37.jpg)
Publishing signed keys• You can now push the signed key to public key
server– Publishing your web of trust
• Verify on the key server
![Page 38: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/38.jpg)
Encrypt Message• You must have the public keys of the intended
recipient– Create a file to encrypt
– Sign (with your private key) and Encrypt (with recipient’s public key) the file
![Page 39: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/39.jpg)
Decrypt Message
• Try to read the encrypted message
![Page 40: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/40.jpg)
Decrypt Message
• Decrypt the file
– The file was:• Signed with [email protected]’s private key• encrypted with [email protected]’s public key
![Page 41: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/41.jpg)
References:
• https://www.gnupg.org/gph/en/manual/book1.html
![Page 42: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/42.jpg)
Lab Exercise
42
![Page 43: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/43.jpg)
Lab Exercise - 1
• Download and install PGP software– Windows: gpg4Win (https://www.gpg4win.org)– OS X: GPG Suite (https://www.gpgtools.org)
![Page 44: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/44.jpg)
Lab Exercise - 2
• Generate and publish key pair– Windows: Follow the lab manual pgp-lab.pdf– OS X/Linux: Follow the slide
![Page 45: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/45.jpg)
Lab Exercise - 3
• Setup mail client:– Thunderbird with Enigmail (follow the slides)
• Send Signed/Encrypted email (follow the slides)
![Page 46: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/46.jpg)
Thunderbird with Enigmail• Download and install Thunderbird
– Add Enigmail (Tools > Add-ons)– Restart Thunderbird
![Page 47: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/47.jpg)
Thunderbird with Enigmail
• Setup Enigmail
![Page 48: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/48.jpg)
Thunderbird with Enigmail
• Setup Enigmail– Select the key-pair you generated earlier
![Page 49: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/49.jpg)
Thunderbird with Enigmail
• Setup Enigmail
![Page 50: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/50.jpg)
Thunderbird with Enigmail
• Send signed email
![Page 51: Email Security PGP / Pretty Good Privacy · 2018. 11. 29. · PGP vs GPG vs OpenPGP ... – Thunderbird with Enigmail (follow the slides) • Send Signed/Encrypted email (follow the](https://reader034.fdocuments.us/reader034/viewer/2022051408/5ff59bd1aa859d7538706f7d/html5/thumbnails/51.jpg)
Thunderbird with Enigmail
• Send signed and encrypted email– You will need the public key of the recipient