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binary
number system that uses 1s and 0s to convert logic statements into math statements
bit
a binary digit
byte
a group of binary digits (usually 8)
steganography
encoding a message into an image file
digital
signals with a finite set of values (a color palette)
analogue
signals with a continuous set of values (a spectrum)
digitization
changing analogue data into digital
digital preservation
process of keeping data accessible for future use regardless of technological changes
digitalization
use of digital systems to change an operation
data
collection of values that hold information
information
data that is processed and has context added to it
knowledge
meaning that is derived from information to achieve something
wisdom
application of knowledge
types of data can include…
financial, medical, geographical
metadata
data about data (the author, size of file)
data mining
process of finding similarities and differences within large sets of data
data matching
comparing two different sets of data to find connections
data life cycle
creation, storage, usage, preservation, destruction
primary data
data collected for a specific purpose
secondary data
data collected for a different purpose
relational database
database with more than one table
validation
making sure only valid data can be entered
verification
making sure the right data is entered
data visualization
process of converting data into visuals
big data
the corporations that hold huge amounts of data
datum
individual value in a collection of data
octal
base 8
hexadecimal
base 16
encryption
process of converting readable data to unreadable data
SSL
Secure Socket Layer - protocol to send information through encrypted links
symmetric key encryption
key to encode and decode data is the same
public key (asymmetric) encryption
key to encode and decode data are different
TLS
transport layer security - improved version of SSL
data masking
process of replacing data with fake data to anonymize it
blockchain
digital ledger of transactions that is duplicated and distributed over a network
why are blockchains reliable
every transaction is recorded, as more transactions are recorded the strength of the blockchain increases
data reliability
how complete and accurate the data is
data integrity
how trustworthy the data is
GDPR
general data protection regulation - data laws for the EU
different types of power
coercive, reward, legitimate, expert, respect, information