Year 9 Recap Flashcards
pharming
re-directing users to a fake copy of the real website
shoulder surfing
watching a user enter their passwords or pins without them knowing
algorthims
a sequence of instructions to complete a task/goal
abstraction
process of removing unnecessary information/details
decomposition
breaking down a problem into smaller sub-problems
ALU
Arithmetic Logic Unit
> maths & tasks get completed
clock
everything is running at the same time
variable
stores a value
indefinite iteration
continuously repeats until a criteria is met
bubble sort
used to sort lists
CU
control unit
> decodes
Register
instructions wait to get called by the bus to the ALU
trace tables
used to help test algorithms before programming
iteration
repeats code
definite iteration
repeats code a set number of times until a goal is met
RAM
Memory
Linear search
> 1 by 1
>looks at each individual item until a goal is met
Binary Search
> data must be in order
splits down the middle
ignores &disregards other data if it does not match the criteria
Pseudocode
common programming language
black hat hackers
illegal hackers- steal data
grey hat hackers
illegal but tell companies their weakness’(eg passwords&usernames)
white hat hackers
ethical and legal hacking
biometric
a personalised password (eg thumbprint, retina scanner)
lossy
> shrinks file
>takes away quality
loseless
> shrinks file
>takes no original quality
blagging
creating a scenario to convince someone that they should give away confidential information to someone in ‘authority’
phishing
emailing users and asking them to log on to a fake account online (eg bank)
