Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario descargar pdf (Pagina 95)

choices offer an excellent balance of speed, safety, and compatibility for the

vast majority of users. Their opinions have evolved over time to take into

account the technology and threats of the day. The people of the GnuPG

project are active participants in the Working Group, and as such GnuPG

implements the Working Group's recommendations.

Therefore, the best advice we can give is to stick to Enigmail's defaults. They

are not perfect, because no two people have the same definition of perfection.

However, the defaults are excellent for the overwhelming majority of users.

11.1.10. How can I test if I'm using Enigmail correctly?

First, you can try to send yourself some message signed/encrypted, and check

if you are able to verify/decrypt them correctly. Then you can send messages to

Adele, “the Friendly OpenPGP email robot”, at [email protected]. Adele is

an automated program that is able to receive and understand OpenPGP

messages and reply accordingly. Remember to send her your public key so

she can encrypt test messages to you. Some examples of communications

with Adele are shown in Chapter 8.

11.1.11. How do I encrypt automatically my email

messages?

Select Encrypt messages by default in your account settings. Then enable

OpenPGP → Preferences → Key Selection → No manual key selection. This

way, outgoing messages are encrypted automatically if a public key is available.

This method of default encryption works only for trusted public keys. So either

you enable OpenPGP → Preferences → Always trust people's keys (which is

slightly insecure), or you have to check every public key and sign it to make the

key trustworthy (in this case you should only sign them locally, non-exportable).

There is one problem with this method: you never know if a mail will be

encrypted when you just push the Send Now button. The workaround for this is

to click on Send Later and look in your Unsent Messages folder.

11.1.12. Is it possible to permanently decrypt email

messages?

This feature has been requested periodically by many people, primarily because

the Email Search feature (in Thunderbird / SeaMonkey) cannot be performed on

encrypted emails.

However, decrypting messages permanently is potentially a bad security

practice. Once a message is stored unencrypted, it is vulnerable to

compromise by anyone that has access to the computer or by any malware

application that could steal it and forward it to anybody. If a message was

confidential enough to be encrypted, it should stay encrypted.

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Red Hat DIRECTORY SERVER 8.1 - 11-01-2010 Manual de usuario Pagina 95