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L
L2TP
Label
Labeled Security Protection
Labeling
Lace Card
Lamer
LAN
LAN (Local Area Network)
LAN Manager
LAND attack
Land Mobile Service
Land Mobile Station
Land Station
Landscape Mode
Language
Language Lawyer
Language Processor
Languages Of Choice
LANMAN
Laptop Computer
Larval Stage
Lase
Laser
Laser Chicken
Laser Intelligence
Lasherism
LASINT
Last-In, First-Out
LATA
Latent fingerprint
Lattice
Lattice Model
Laundromat
Law Enforcement Interfaces
Laws, Regulations, And Other Public Policies
Layer 2 Tunneling Protocol (L2TP)
LDB
LEAD
Leaf Site
Leak
Leaky Heap
Leapfrog Attack
Learning aids
Leased-Line Networks
Least Privilege
Leech
Legacy security technology
Legal
Legal And Liability Issues
Legalese
Legitimate User
LER
LERP
Lessons Learned
Let The Smoke Out
Letterbomb
Level
Level I/II/III
Level Of Trust
Lexer
Lexiphage
Liberty Alliance
Life
Life Cycle
Life Cycle Security
Life Cycle System Security Planning
Life Is Hard
Life-Cycle
Life-Cycle Security
LIFO
Light Pipe
Lightweight
Like Kicking Dead Whales Down The Beach
Like Nailing Jelly To A Tree
Likelihood of a threat
LIMDIS
LIMFACS
Limited Access
Limited Access Area
Limited Access Security Mode
Limited ADP Access Security Mode
Limited Area
Limited Exclusion Area
Limited Maintenance
Limited Protection
Line
Line Authentication
Line Conduction
Line Conductors
Line Eater, The
Line Load Control
Line Noise
Line Of Sight
Line Starve
Linear Analog Synchronization
Linear Predictive Coding
Linear Programming
Linearithmic
Link
Link Control Protocol
Link Encryption
Link Farm
Link Layer
Link Level
Link Protocol
Linkage
Link-By-Link Encipherment
Link-By-Link Encryption
Link-Dead
Lint
Linux
LINUX distribution
Lion Food
Lions Book
LISP
List Oriented
List-Based Access Controls
List-Oriented
Literature Intelligence
Literature, The
Lithium Lick
LITINT
Little-Endian
Live
Live Data
Live Free Or Die!
Live testing
Livelock
Liveware
LKG
LLC
LLNL
LMD
LME
LMI
Lobotomy
Local Area Network
Local Area Network (LAN)
Local Area Network Security
Local Exchange Loop
Local Nationals
Local Users and Groups
Locals, The
LOCK
Lock down
Lock-And-Key Protection System
Locked And Loaded
Locked Up
Lockout
Log
Log entry
Logging
Logic bomb
Logical
Logical Access Control
Logical Circuit
Logical Completeness
Logical Completeness Measure
Logical Link Control Sublayer
Logical Signaling Channel
Logical Topology
Login
Login History
Login password
Login/log In
Log-Off
Logoff/log Off
Logon
Log-On
Logon/log On
Logs And Journals
Long Title
Long-Haul Communication
Long-Range Plan
Loop
Loop Through
Loop-Back
Loophole
Loose Bytes
Lord High Fixer
LOS
Lose
Lose Lose
Loser
Losing
Loss
Lossage
Lost Call
Lost In The Noise
Lost In The Underflow
Lots Of MIPS But No I/O
Low Power
Low Probability Of
Low Probability Of Detection
Low Probability Of Intercept
Low Water Mark
Low-Bandwidth
LP
LPC
LPD
LPI
LPT
LRIP
Ls
LSI
LTHE
Lubarsky's Law Of Cybernetic Entomology
Lunatic Fringe
Lurker
Luser
Letterbomb
  • n. A piece of email containing live data intended to do nefarious things to the recipient's machine or terminal. It is possible, for example, to send letterbombs that will lock up some specific kinds of terminals when they are viewed, so thoroughly that the user must cycle power (see cycle, sense 3) to unwedge them. Under UNIX, a letterbomb can also try to get part of its contents interpreted as a shell command to the mailer. The results of this could range from silly to tragic. See also Trojan horse; compare nastygram.
  • Loosely, a mailbomb.