Digital identity

Explain with your own example the difference between digital identity (what you choose to show), digital footprint (the trail left behind even if you do not choose to) and digital reputation (what others conclude from both).

From this list, indicate which data should never be published publicly and explain the risk of each one: your postal address, your favourite team, your ID card number, a photo of your holiday, your timetable and a photo of your face alongside the name of your school.

Classify these trails into active digital footprint (left intentionally) or passive digital footprint (left unintentionally): posting a photo, the cookies installed by a website, a comment on a video, the route recorded by your phone's GPS. Justify each classification.

The figure shows how everyday activity on the internet leaves a digital footprint recorded on a server.

Explain what data remains in the first two cases and what trail would reasonably fill the gap marked with ?. Finish by explaining why that footprint can remain visible years later.

When sharing a photo, you do not just share the image: the file contains hidden data that travels with it, as shown in the figure.

Indicate what the data marked with ? reveals, explain what metadata is and why it is advisable to remove it before posting a photo.

Analyse this statement: "if you post nothing on social media, you do not have a digital footprint". Reason why this is false even for someone who does not have an account, giving at least two examples of trails that are generated anyway.

"It doesn't matter, it's a story that disappears after twenty-four hours." Explain why a screenshot breaks that supposed security and what you should always remember before posting any "temporary" content.

Explain at least three ways in which a photo uploaded "for friends only" can end up public and what practical conclusion is drawn: does "private" really exist once published?

A chain message spreads a photo of a classmate without their permission along with taunts. Explain what effect this has on their digital reputation, why forwarding it "without commenting" also contributes to the harm, and what you should do upon receiving it.

Explain the difference between using your real name, a nickname and an avatar on the internet, what a nickname protects and does not protect, and in which contexts each option is suitable.

When searching for your name on the internet, your school's website appears with the list of participants in a competition. Explain whether this poses a problem, what the difference is between your own school posting it or a stranger doing so, and what you could request if you do not want your name to appear.

An online game asks for your real name "for the global leaderboard". Explain the risks of providing it, what reasonable alternatives exist (nickname, gamer tag) and what you would do if the game made it compulsory.

A scholarship-granting organisation reviews the public social media accounts of candidates. Explain why what was posted years ago can still appear today and describe two present habits that protect your future reputation.

At age 14, Tomás committed a minor infraction in a sports competition, and a local digital newspaper published his full name in a report. Today Tomás is 24 years old, is applying for a skilled job, and that news story still appears as the top result when searching for his name on Google.

1. a) Tomás is hesitating between requesting the "right to be forgotten" from Google or demanding that the newspaper delete the article. Justify the technical and legal difference between de-indexing a link on a search engine and deleting the content at the original source.
2. b) Analyze the conflict of rights at play between Tomás's interest (data protection and privacy) and that of the media outlet (freedom of information and newspaper archive preservation).
3. c) Predict what the Data Protection Agency would foreseeably decide regarding Tomás's request to remove the link from the search engine, justifying your answer according to the criteria of the person's current public relevance, accuracy, and the time that has elapsed.

Some experts propose a "digital age of majority": that content posted before a certain age no longer counts. Argue for and against this idea (maturity, responsibility, right to a second chance) and conclude with your reasoned position.