Editing Chapter 6: Edge Security and Privacy (section)

=== Security and Privacy issues for edge computing===
# nodes of edge connected to large number of IoT
## these have limited resources 
## heterogeneous internal components
## Key management for ensuring privacy of data is difficult

==== Issues ====
# Edge nodes are near to users which makes large amount of sensitive data, which might be stolen 
# Edge computing possess low network resources so doesn't support expensive encryption algos 
# Edge environment consists of dynamic env which is changing, which allows attackers multiple ways to join the network
  Also difficult to create securiy rules for a changing network

==== Attacks ====
; Eavesdropping: Monitor channel to steal data
;# DDoS
: interrupt normal services provided by different servers
;# Data Tampering
: Attacker can alter the data transmitted over comm channel 
;False data injection
:Attacker injects false code in network which brings all data to the attacker
;Physical attack
:Physical protection of edge infra is weak, which allows attackers to compromise the physical locations of edge devices.
; Rogue gateway
:inject large amounts of traffic into edge network infra, similar to MITM

==== Privacy issues in edge computing ====
# weak security techniques for system protection
# unsafe communication between devices
# difficult recovery and data backup
# no specific pattern of update reception 
# lack of proper network visibility
# lack of user's selective data collection

==== Countermeasures for Fog Computing ====
;Efficient encryption techniques
:Allows for resource constrained edge devices to encrypt communcations with complex algorithms  
;Decoy technique
:Authenticate data of user present the computing network by replacing original information with fake information that is provided to attackers
 When breached, the attackers find the decoy files 
;Intrusion detection system
:Detect and protect from attacks including DoS, insider attackers, port scanning attacks, flooding attacks on virtual machine, MITM
;Blockchain security for fog computing
:Blockchain is a way to cryptographically ensure the validity of a system while simultaneously increasing it's security. Using blockchain for edge computing reduces single point failure, increases network security and helps with tracking node status effectively.