29.08.2026 - A Message has 3 dates

This OSINT challenge was made by "Lost" in the Hacktoria Discord.

A message has three dates.
One is shown.
One is stored.
One never happened.
A fourth is the key.

It is not in the file. It was seen on here 16 June 2026

Flag:ctf{...}

Hint #1: There is something off if you search it here - One of the three dates is impossible. Impossible days still have hours.

Hint #2: Three channels carry the picture. A fourth carries nothing you can see.

Hint #3: Even the colours were described by someone. Read the description.

Hint #4: You have numbers. You have words. You used them once. Use them again, differently.

Hint #5: The signature signs nothing.

Write-up

Nobody Solved It: Post-Mortem of a Stego Chain

A PNG, a Discord snowflake as the seed, scattered alpha-LSB, a rogue ICC tag. Six stages, zero solves in a week, and what a chain without redundancy costs.

SPURIAKevin Sander