[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] MAC (Mandatory Access Controls)  2nd  Mac OS X  2nd  [See also BSD Unix]     history of      host-based firewall for  2nd      kernel security levels on      NetInfo      password database      password file, printing      S/Key support      server startup on      SMB support      sudo program  2nd      TCP Wrappers support  Mach kernel  machine name  macro virus  [See viruses] MACs (message authentication codes)  2nd  3rd  magic cookies  magic number  magnetic tapes  [See tapes] mail  [See email] MAIL command, SMTP  mail handler (MH)  mail systems  [See MTAs] mail user  Mail_Aliases table (NIS+)  mailboxes  [See email] mailing lists, security-related  mailq command  main.cf file  maintenance mode  maintenance personnel, security regarding  makedbm program  malicious code  [See programmed threats] malware  [See programmed threats] man-in-the-middle attack  management     participation in security policy      role of  2nd  3rd  Manasse, M. S. ("The Number Field Sieve")  Mandatory Access Controls  [See MAC] mandatory filtering software  mandatory record locking  Mann, Charles C. (@ Large)  manpages  MANs (metropolitan area networks)  manuals     reading      restricting availability of  maps, NIS  [See NIS] Markoff, John     Cyberpunk: Outlaws and Hackers on the Computer Frontier      Takedown: The Pursuit and Capture of Kevin Mitnick, America's Most Wanted Computer Outlaw -- By the   master password file  master server  2nd  [See also NIS] master.passwd file  2nd  MCF (Modular Crypt Format)  McGraw, Gary (Building Secure Software<Default Para Font)  McKusick, Marshall Kirk (The Design and Implementation of the 4.4 BSD UNIX Operating System)  MD2 functions  MD4 functions  MD5 algorithm  2nd  MD5 cryptographic checksum  MD5 functions  media     backing up to  [See backups]     destroying  2nd      failure of, for backups      overwriting      print through process      printed  2nd  3rd      read-only      rotating for backups      sanitizing      tapes  2nd      upgrading      viruses from      write-once, logging to  meet-in-the-middle plaintext attacks  memory, swap space, running out of  Merkle, Ralph     "Hiding Information and Signatures in Trap Door Knapsacks"      "On the Security of Multiple Encryption"      "Secure Communication Over Insecure Channels"  Merkle, Robert  message authentication codes  [See MACs] message digest functions  2nd      applications of  2nd      attacks on      checksums generated with      HMAC      Tripwire package and  message flooding  Message Transfer Agents  [See MTAs] Message User Agents (MUA)  messages file  2nd  3rd  [See also syslog file]4th  5th  metadata  2nd  Metcalf, Bob  "A Method for Obtaining Digital Signatures" (Rivest, Ron; Shamir, A.; Adleman, L.)  metropolitan area networks (MANs)  MH (mail handler)  Miller, Barton P.  2nd      "An Empirical Study of the Reliability of UNIX Utilities"  Minix operating system  mirror sites  mirrored disks and servers  MIT Kerberos  [See Kerberos system] MIT-KERBEROS-5 authentication  Mitnick, Kevin  2nd  MKDIR function (RPC)  mknod command  MKNOD function (RPC)  mkpasswd program  mkstemp() system call  MLS (Multilevel Security) environment  MNT request  mobile Unix systems  mode bits  [See permissions] modems      answer mode      banners displayed by      baud      bps (bits per second)      callback schemes and  2nd      Caller-ID and  2nd      clogging      connecting      current trends for use of      eavesdropping and      encrypting      hanging up with SIGHUP      initiating calls with      one-way phone lines used by      originate mode      password      phone numbers for, changing      physical security of      reasons to use      recording call information      RS-232 serial protocol used by      security and  2nd      security checklist for      serial interfaces used by      telephone scanning and firewalls for      testing      tracing connections      unauthorized      Unix devices for  modification times, files  2nd  Modular Crypt Format (MCF)  Mona Lisa Overdrive (Gibson, William)  monitoring  [See also logging]2nd  monitoring services  Morris, Robert H.  2nd      "UNIX Operating System Security"  Morris, Robert T.  motion detectors  mount command  2nd  3rd  MOUNT protocol  mountd daemon  mounted filesystems  mrand48() system call  MSDOS filesystem  MTAs (Message Transfer Agents)  mtime  2nd  3rd  4th  mtree program  MUA (Message User Agents)  Muddleftpd server  MUDs (Multiuser Dungeons/Dimensions)  Muffet, Alec  2nd  multicast groups  MULTICS (Multiplexed Information and Computing Service)  multilevel security (defense in depth)  2nd  3rd  multitasking  multithreaded programming  Multiuser Dungeons/Dimensions (MUDs)  multiuser operating systems  multiuser, shared systems  MX record type