Authentication

Authentication

Creating an authentication algorithm

Multiple Select

In this lesson I am going to learn to ... ?

• Define 'authentication'

• Create an authentication algorithm

• Implement authentication algorithm using a 2D data structure

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The process of accessing a restricted resource by providing data known only to you is called

Multiple Select

What information is usually requested when logging in to a computer system or restricted website ?

• Username

• Password

• Full name

• Phone number

• Date of birth

Multiple Choice

What type of data structure is this?

• 2D list

• 1D list

• String

• Tuple

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What is the length of this data structure?

Multiple Choice

This is a possible algorithm for authentication.

What format is used to represent it?

• Structured English

• Flowchart

• Pseudocode

• Program code

Multiple Choice

What should be in the ?

• User ID found?

• User password found?

• User ID and password entered?

• Valid password?

Multiple Choice

What should be in the ?

• Find user ID in data structure

• Is valid user ID?

• Get user ID

• Does password match user ID?

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Type the name of a data structure ...

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Type the name of a file object ...

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Type a line number showing start of iteration over a data structure ...

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Type a line number showing start of a conditional loop ...

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Type a line number showing the start of a selection statement ...

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Type name of a built-in function ...

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Type a Python keyword that is shown ...

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Type a line number containing a Boolean expression ...

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Type name of a string variable ...

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Type name of a Boolean variable ...

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Type name of an integer variable ...

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Type a line number showing incrementation ...

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Type a line number showing indexing of a data structure...

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Type a line number showing a comment ...

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Type name of a string method (without parenthesis) ...

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Type name of a list method (without parenthesis) ...

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Keeping the users logging in credentials stored in an external data file rather than in the program code is an example of

of concerns.

Multiple Choice

What file format is most suitable for storing user credentials such as usernames and passwords?

• .csv

• .txt

• .doc

• .pdf

Multiple Choice

What process should have happened to the password data before it is stored in the data file?

• Encryption

• Compression

• Validation

• Verification

Multiple Select

What two methods are available to a programmer when accessing a persistent data file of user credentials?

• Read all the data into a data structure and then process it

• Read and process the data directly from the data file

• Read and process the data one line at a time

• Read some of the data into a data structure before processing

Multiple Choice

Which would be the most appropriate method?

Checking if a particular username has been used or not

• Read all data into data structure

• Leave data in file and process it from there

Multiple Choice

Which would be the most appropriate method?

Sorting all the usernames into alphabetical order

• Read all data into data structure

• Leave data in file and process it from there

Multiple Choice

Which would be the most appropriate method?

Allowing students to change their passwords

• Read all data into data structure

• Leave data in file and process it from there

Multiple Choice

Which would be the most appropriate method?

Checking if an entered password matches the username

• Read all data into data structure

• Leave data in file and process it from there

Multiple Choice

Which would be the most appropriate method?

Increasing the password strength of all users

• Read all data into data structure

• Leave data in file and process it from there

Multiple Select

In this lesson I have learned to ...

• Define 'authentication'

• Create an authentication flowchart

• Implement authentication using a 2D data structure

Open Ended

Thinking Hard

What is the most interesting thing you’ve learnt today?

Compare your idea with a friend.

Explain why your idea is more important ...

(press Shift+Enter to take a new line ...)

Poll

How much of this lesson have you understood?

• None of it

• Some of it

• Most of it

• All of it