Linux Security Cookbook

editing encrypted files  2nd 

elapsed time (displayed in ticks) 

elm mailer 

ELMME+ 

Emacs

    encrypted email with 

        Mailcrypt package, using with GnuPG 

    encrypted files, maintaining with 

email 

    encryption

        with elm 

        with Emacs 

        with Evolution 

        with MH 

        with mutt 

        with vim 

    Mailcrypt package  [See Mailcrypt]

    POP/IMAP security

        with SSH 

        with SSH and Pine 

        with SSL 

        with SSL and Evolution 

        with SSL and mutt 

        with SSL and Pine 

        with stunnel and SSL 

    protecting

        encouraging use of encryption 

        encrypted mail with Mozilla 

        between mail client and mail server 

        at the mail server 

        receiving Internet email without visible server 

        from sender to recipient 

        sending/receiving encrypted email with Pine 

        testing SSL mail connection 

    sending Tripwire reports by 

    SMTP server, using from arbitrary clients 

empty passphrase in plaintext key 

empty quotes ("") 

encryption 

    asymmetric  [See public-key encryption]

    of backups 

    decrypting file encrypted with GnuPG 

    email  [See email, encryption]

    files  [See also files, protecting]

        entire directory tree 

        with password 

    public-key  [See public-key encryption]

    symmetric  [See symmetric encryption]

encryption software 

Enigmail (Mozilla) 

env program

    changes after running su 

    X windows DISPLAY and XAUTHORITY, setting 

environment variables 

Equifax (Certifying Authority) 

error messages (system), including in syslog  2nd 

errors

    onerr keyword, PAM listfile module 

    PAM modules, debugging 

Ethereal (network sniffing GUI)

    observing network traffic 

        capture and display filter expressions 

        data view window 

        packet list window 

        tree view window 

    payload display 

    tethereal (text version) 

    tool to follow TCP stream 

    verifying secure mail traffic 

Evolution mailer 

    certificate storage 

    POP/IMAP security with SSL  2nd 

exclamation point  [See !, under Symbols]

executables

    ignoring setuid or setgid attributes for 

    linked to compromised libraries 

    prohibiting entirely 

execute permission, controlling directory access 

executed commands  [See process accounting]

expiration for GnuPG keys 

exporting PGP key into file 

extended regular expressions, matching with ngrep