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Search everything, or narrow it down: Forensic for technical references, Cyber for security guidance and tools, Studio for teaching materials, Play for games and Kids for family activities.
Artifact Atlas →
Documented formats, raw examples, repeatable checks and report notes.
Artifact library →
Sourced reference pages for Windows, Android, iOS, browser and app artifacts.
Windows event ID guide →
Security, System and operational event IDs: fields, correlation and caveats.
Forensic tools →
Hash, file signature, hex, Exif, decoder, IMEI, timestamp and time-zone tools.
Forensic glossary →
Definitions of digital forensics terms, cross-linked.
Training curriculum →
12 modules, from integrity and time to reporting.
Practice areas →
10 areas of examination: computer, mobile, memory, network, cloud, email, incident response, e-discovery, media, communication records.
Procedures and SOPs →
10 standard operating procedures, from first response and acquisition to examination notes, reporting and lab quality.
Forms and templates →
Fillable chain of custody, evidence intake, acquisition record, examination log, legal hold and first-responder checklist.
Case studies →
9 worked examinations on synthetic data: question, evidence, method, findings with a confidence level and the limits of the evidence.
Case packs →
4 downloadable synthetic evidence sets: Windows triage, an Android messaging database with its write-ahead log, and email headers with a message-trace export. Each comes with questions checked in the browser and instructor notes.
Legal and standards framework →
Turkish law and international standards (ISO/IEC 27037, 27041-27043, 17025, NIST, Budapest Convention) with primary-source links.
Report anatomy →
The eight parts of a defensible report, a four-level confidence scale and honest versus overstated phrasing.
Compare time bases →
NTFS, FAT32 and Unix timestamps: units, epoch and local-time limits.
Digital Time and File Lab →
Convert Unix values and calculate a file hash in your browser.
Read-only SQLite and WAL binary inspector →
Inspect SQLite page header, WAL checksum chain, commits and bytewise page differences from local files.
CDR & communication record workbench →
Local CSV correlation with UTC timeline, SHA-256, source linked number pairs and technical report.
SQLite Type Trap →
Five source-based SQLite interpretation decisions with explanations.
Forensic methods →
Four reproducible guides for timestamps, SQLite, timelines and hashing.
Offset Paradox →
Convert four UTC offsets to find the true order of events.
Provenance Trail →
Put four source and report records in the right order.
Missing USB lab →
Order four records using their time offsets.
Night Shift lab →
Rebuild a chronology and compare it with the solution.
Report builder →
Write a structured technical report and download it as Word, PDF, TXT or JSON.
Lost Signal →
Six missions, twelve incidents: order the logs, find the fault and restore the network.
Star Memory →
Match twelve or sixteen cards at your own pace.
Orbit Focus →
Find the target symbol; add a timer if you like.
Galaxy Patterns →
Find the rule behind six number sequences, with hints.
Printable puzzle worksheets →
Sudoku, Takuzu, Futoshiki, Calcudoku and more on A4, with an answer key.
Play for teachers →
Worksheets, rule cards, a lesson plan and classroom privacy notes.
Printable rule cards →
The rules of every Play game on one A4 page each, for the classroom wall.
Digital literacy challenge →
Learn to spot misleading web addresses.
Shape Explorers →
Four shapes, a six-round game and a printable activity.
Digital Trail Detective →
Stories about sharing and personal information, played with a grown-up.
Guide for grown-ups →
Learning goals, reading support and data handling for each activity.
Tosbi's Fact Cards →
Fifty-four "Did you know?" cards about animals, animal homes, space, nature and the body, each with a small thing to try.
Song Garden →
Seven original sing-along songs with a tune, words that light up as you sing and a play-along band of drum, shaker, bell and clap.
Printable Colouring Pages →
Thirty original A4 colouring pages to print at home or in class.
Printable Certificates →
Type a name and an achievement, then print a colourful or classic A4 landscape certificate. Everything stays on your device.
Printable Feeling Cards →
Eight picture cards with Piko and friends, one feeling on each, to print on one A4 page and cut out.
Structured template editor →
Edit a quiz, child activity or technical card; preview and export it.
Studio overview →
Choose what you want to make and see the steps.
Trust Centre →
Sources, privacy, children’s safety and site security.
Accessibility and controls →
Keyboard controls, reduced motion and reporting a problem.
Privacy and data handling →
What data is handled, where it stays and how to remove it.
ZEKASTRA Cyber →
Threat profiles, browser tools, checklists and standards for defending accounts, devices and websites.
Cybersecurity services →
5 scoped, consultative services for small organisations: assessment, incident review, staff sessions, website review, written plans. Contact by e-mail.
Cybersecurity training →
10 short modules with self-checks: passwords, MFA, phishing, backups, home network, privacy, phones, websites, incidents, families.
Decision scenarios →
6 realistic situations to decide on, each choice explained.
Threat profiles →
14 threats explained defensively: how they work, how to notice them and what reduces the risk.
Security tools →
6 tools that run in your browser: password strength, file hash, link, e-mail header, HTTP header and JWT.
Security checklists →
6 checklists: accounts, devices, home network, small organisation, website and the first hour of an incident.
Security glossary →
39 terms from authentication to zero-day, in plain language.
Standards and law →
NIST, ISO/IEC 27001, CIS, OWASP and MITRE ATT&CK, with the Turkish laws on cybersecurity, computer offences and personal data.
Phishing →
A message that imitates a bank, an agency or a colleague to get you to open a link, enter a password or approve a payment.
Social engineering and payment fraud →
Manipulating people rather than systems: a fake executive, supplier or support agent persuades someone to move money or reveal access.
Password attacks →
Guessing, replaying or cracking passwords: brute force, credential stuffing and password spraying.
Account takeover →
An attacker signs in as you using a stolen password, a hijacked session or a transferred phone number.
Malware →
Software built to steal data, take control of a device or damage it: infostealers, trojans, spyware, worms and loaders.
Ransomware →
Malware that encrypts files and demands payment, often after the attacker has also copied the data.
Injection (SQL and command) →
Untrusted input is treated as part of a query or command, so the application runs something its developer never intended.
Cross-site scripting (XSS) →
A page includes attacker-controlled content as active code, so it runs in the visitor's browser with the site's permissions.
Broken access control →
The application checks who you are but not what you may do, so one user can reach another user's data or functions.
Denial of service (DoS and DDoS) →
Overwhelming a service or its network link so legitimate users cannot reach it.
Interception (man-in-the-middle) →
An attacker sits between you and a service and reads or alters what passes, typically on an untrusted network.
Software supply-chain compromise →
Malicious code reaches you through something you trust: a library, an update, a build tool or a vendor.
Misconfiguration and exposed services →
A correct product set up unsafely: a public storage bucket, a database open to the internet, a default password, a debug page left on.
Unpatched vulnerabilities →
A known flaw in software for which a fix exists but has not been applied.
Accounts and passwords →
Why length beats complexity, why reuse is the real danger, and how a password manager fits into daily life.
Multi-factor authentication and passkeys →
What the second factor adds, which kinds are stronger than others and why passkeys resist fake sites.
Recognising phishing and fake messages →
The pressure patterns behind most fake messages, a calm routine for checking them and how to report one.
Updates and backups →
Why patching closes known holes, how the 3-2-1 backup rule works and why an untested backup is only a hope.
Home network and Wi-Fi →
The few settings on a home router that matter, what a VPN does and does not do, and how to treat smart devices.
Personal data and privacy →
What counts as personal data, why collecting less is the strongest protection and how to share and delete with care.
Phones and apps →
Screen lock, app sources and permissions, and what to do when a phone is lost or a SIM is taken over.
Securing a website you run →
For site owners: HTTPS, security headers, forms, dependencies and the admin account, ordered by how much risk each removes.
When something goes wrong: the first hour →
A calm sequence for the first hour of an incident: contain, preserve, tell the right people, then recover.
Families and children online →
For parents and carers: ground rules, accounts and privacy settings, and how to talk when something frightening happens.
Password strength and generator →
Shows how length and character set decide the number of possibilities, what that means under three stated guessing speeds, and generates a random password in your browser.
File integrity check →
Computes SHA-256, SHA-384 or SHA-512 of a file or text in your browser and compares it with the value the publisher lists.
Link anatomy →
Splits a web address into its parts and points out patterns common in phishing links: a hidden real host, lookalike characters, a brand name in a subdomain.
E-mail header reader →
Reads pasted message headers, lists the sender fields and authentication results and flags mismatches between the visible sender and the technical sender.
HTTP security header audit →
Checks pasted response headers for Strict-Transport-Security, Content-Security-Policy, framing, MIME sniffing, referrer and cookie attributes, with the reason for each finding.
JWT inspector →
Decodes the header and payload of a JSON Web Token locally, converts the time claims and flags settings that deserve attention, such as an unsigned token or no expiry.
Sudoku →
The classic 9×9 number puzzle: each digit once in every row, column and box.
Nonogram →
Reveal a hidden picture from the number clues.
Takuzu →
Fill the grid with zeros and ones, never three alike in a row.
Futoshiki →
A Latin square in which the signs between cells say which number is larger.
Calcudoku →
Fill the grid so that every outlined cage reaches its target.
Skyscrapers →
Place the towers so that each edge clue counts the right number of visible buildings.
Queens →
One queen in every row, column and coloured region, none of them touching.
Minesweeper →
Clear the field using the numbers; the campaign never needs a guess.
Lights Out →
Each press flips one light and its four neighbours.
Code Breaker →
Crack the hidden colour code.
Akari →
Light every white cell without letting two lamps see each other.
Bridges →
Join the islands with bridges so that each island has as many as its number says.
Tents →
Pitch one tent next to every tree.
Battleships →
Find the hidden fleet from the row and column counts.
Hitori →
Shade cells until no number repeats in any row or column.
Number Path →
Fill the grid with one unbroken path of consecutive numbers.
Doppelblock →
Place two blocks in every row and column; the clues add up the numbers between them.
Ripple Effect →
Fill each room with the numbers 1 up to its size, keeping equal numbers well apart.
Str8ts →
Fill the white cells so that every run between black cells is a straight of consecutive numbers.
Suguru →
Fill each region with the numbers 1 up to its size; equal numbers may not touch.
Country Road →
Draw one loop that enters and leaves every room exactly once.
Gokigen →
Draw a diagonal in every cell so that the numbers add up.
Kurodoko →
Shade cells so that every number sees exactly that many white cells.
Tapa →
Shade one connected wall; each clue counts the shaded groups around it.
Galaxies →
Divide the grid into galaxies, each symmetric around its star.
Heyawake →
Shade as many cells as each room allows, never edge to edge.
LITS →
Shade one L, I, T or S in every region, and never fill a 2×2 block.
Norinori →
Shade exactly two cells in every region, as separate dominoes.
Dominosa →
Tile the grid so that every pair of numbers, doubles included, appears once.
Logic Grid →
Work out who sits where from the clues: names, shirts, pets and drinks.
Sliding Tiles →
Slide the tiles into order. The campaign runs from one-move boards to the hardest ones.
Tower of Hanoi →
Move the tower to the target peg without ever placing a larger disc on a smaller one.
Peg Solitaire →
Jump pegs until one is left. In every campaign position only one jump can still finish.
Colour Sort →
Pour the colours into tubes that match.
Pipe Network →
Rotate the pipes until water reaches every outlet.
Neuro-Circuit →
Rotate the logic parts until every core gets the current it asks for.
Quantum Prism →
Rotate mirrors, filters, prisms and portals so that every target ring receives a beam of its own colour.
Exit Route →
Slide the other blocks aside so that the marked block can leave the board.
Line Link →
Connect every matching pair and fill the whole board.
Crate Push →
Push every crate onto a target, and never trap one in a corner.
Tangram →
Fill the silhouette with all seven pieces: rotate them, flip the parallelogram and fit them together.
Number Pyramid →
Complete the pyramid: every block is the sum of the two blocks below it.
Target Number →
Reach a three-digit target from six numbers and the four operations.
Krono-Matrix →
Set the numbers so that every row, column and diagonal reaches its target.
2048 →
Slide the tiles and merge equal numbers until you build 2048.
Make 24 →
Make exactly 24 by using all four numbers once each.
Quick Maths →
Solve the sum. Every campaign question has exactly one whole-number answer.
Equation Hunt →
Find the hidden equation in six tries, guided by colour feedback.
Word Search →
Find every word on the list; each lies on one straight line.
Hangman →
Guess the hidden word letter by letter before the drawing is complete.
Five Letters →
Guess the five-letter word in six tries, with feedback on every letter.
Cipher Quote →
Decode a familiar proverb in which every letter has been swapped for another.
Sequence Memory →
Watch the pads light up, then repeat the sequence in the same order.
Number Grid →
Find the numbers in order, starting from 1.
Colour or Word →
Pick the colour the word is printed in, not the word itself.
Reaction Test →
Wait for the signal, then react as fast as you can.
N-Back →
Say whether the square is where it was N steps ago.
Block Memory →
Watch the blocks light up and tap them back in the same order.
Number Memory →
Remember a number shown briefly, then type it back.
Odd Shade →
Find the one square whose colour is slightly different.
Pattern Memory →
Remember which tiles lit up, then rebuild the pattern.
Mangala →
The traditional Turkish stone-sowing game.
Turkish Draughts →
Turkish draughts with straight moves, flying kings and compulsory captures.
Four in a Row →
Drop discs into the grid and line up four before the computer does.
Reversi →
Flank the opponent's discs to turn them into yours.
Five in a Row →
Place stones on a large board and be the first to make an unbroken row of five.
Dots and Boxes →
Find the winning line. Boards grow from 2×2 to 4×4, and each campaign position is proved by exhaustive search.
Nim →
Find the one winning take of matches.
Ultimate Tic-Tac-Toe →
Nine noughts-and-crosses boards in one: each move decides where your opponent plays next.
Snake →
Steer the snake to the food and avoid hitting yourself.
Brick Breaker →
Bounce the ball off the paddle and clear every brick.
Block Drop →
Rotate and place falling blocks to clear full rows.
Asteroid Belt →
Steer your ship through the asteroid belt and break up the rocks.
Kakuro →
Fill the white cells so that every run adds up to its clue.
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