Nikola Protrka, PhD

University of Zagreb, Police College, Faculty Member

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With both an operational and strategic police background and over 20 years of training and development experience my passion is Cyber Intelligence/Surveillance/Defence, operational risk and business continuity related issues and learning to improve performance, employee awareness and professionalism. Experienced training manager and facilitator with a reputation for producing a positive and productive learning environment and specializing in cyber crime, operational risk and business continuity learning experiences including digital evidence, computer forensics and data protection, with national and international experience at both the strategic and operational levels.
I have a reputation for maximizing learning outcomes, improving organizational and individual cyber, operational risk and business continuity knowledge, as well as training new attack vectors in security, with an expertise in blended learning that focuses on work-based problem orientated development related to operational risk, business continuity, cyber risks and cyber forensics.

Security, Cybercrime, Digital Evidence, Computer Forensics, Data Privacy, Digital Transformation, Information Management, Artificial Intelligence, Law Enforcement and Intelligence Agencies, Cyber Intelligence/Surveillance/Defence, OSINT

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Papers by Nikola Protrka, PhD

Artificial Intelligence in Health Care: Various Applications

The Recognition of an E-Mail Phishing Cyberattack in Business Organizations

Policija i sigurnost

information (personal or official) for financial gain. That is one of the oldest cyber threats. T... more information (personal or official) for financial gain. That is one of the oldest cyber threats. There is a wide range of phishing attack techniques, and the most frequent one is performed via electronic mail. Due to major changes in conducting business in the last pandemic, which entail remote work, fast digital transformation and the increase of ICT technologies, the statistics show that phishing attacks are on the rise. Employees who lack developed awareness of phishing attacks, responsibility and knowledge represent a potential danger to the entire organisation. This paper describes the research on e-mail phishing recognition in business organisations in Primorje-Gorski kotar County. The research showed that employees are not aware of phishing attacks to a sufficient extent and that all the habits contributing to the IT security level regarding these attacks are not satisfying. To protect against such attacks, organisations should, in addition to implementing safety technical mea...

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Kriminalistička analiza podataka mobilne i fiksne telefonije u razrješavanju kaznenih djela

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Exploring the right to be forgotten in a digital world

Utvrđivanje istovjetnosti digitalnih dokaza pomoću HASH funkcija

Pregled metoda kibernetičkih napada na kritičnu nacionalnu infrastrukturu, studije slučaja iz prakse

Provođenje kriminalističkih istraživanja korištenjem P2P računalnih mreža

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Računalna analiza ljudskog glasa i govora

Korupcija i otvoreni izvori

Računalni podaci kao elektronički (digitalni) dokazi

Policija i sigurnost, Jun 15, 2011

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Knowledge Management (KM) and Intelligence-Led Policing (ILP)

Springer eBooks, 2021

Evaluation of Digital Evidence in Criminal Proceedings in Croatia with a Focus on Preservation Requirements and Role of Standard Operative Procedures

Collection and analysis of digital evidence in criminal proceedings entails risks, such as the co... more Collection and analysis of digital evidence in criminal proceedings entails risks, such as the contamination of evidence during seizure and/or search of a computer system and the inability to establish its authenticity, which may affect its admissibility and credibility before the courts. For that purpose the requirement on digital evidence preservation is prescribed in the criminal procedure law, which should apply by default to all relevant actors. Analysis of available court decisions and rules of the Criminal Procedure Act confirms that the claims concerning mishandling and/or manipulation of digital evidence do not affect ex lege inadmissibility of such evidence. Such claims would be subject to examination on the credibility (reliability) of evidence before the courts. Any detailed technical procedures and measures to be implemented so as to ensure digital evidence preservation are best suited for regulation by standard operative procedures or perhaps e ven by sublegal acts. To that effect, the standard operative procedures discussed in this paper have a proven ability to ensure the common goal of ensuring digital evidence preservation. Adherence to best practices stemming from standardized procedures has shown to be vital for ensuring that investigatory procedures and acquired digital evidence are valid and as such accepted throughout the criminal proceedings.

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Corruption and open sources

U radu se obrazlažu novi dosezi i mogucnosti koristenja primarno interneta kao otvorenog izvora z... more U radu se obrazlažu novi dosezi i mogucnosti koristenja primarno interneta kao otvorenog izvora za prikupljanje informacija o mogucem pocinjenom kaznenom djelu korupcije. U posljednje vrijeme svjedocimo rasprostranjenosti drustvenih mreža i svakodnevnoj dostupnosti komunikacije zbog sveopceg informatickog napretka. To se posebno ocituje prilikom koristenja tzv. pametnih telefona koji u sebi sadrže digitalni aparat, GPS za geografsko lociranje, spajanje s internetom itd. Korisnici cesto nisu svjesni koliko je podataka o njima samima sadržano na "mreži svih mreža" - internetu, a ove podatke istražitelji mogu pomocu analiticke obrade složiti u kvalitetan mozaik sastavljen od mnostva, na prvi pogled, nepovezanih podataka. Države kao sto je Hrvatska, ali i druge države u regiji, nažalost, nisu imune na korupciju i ona je sastavni dio svakodnevnih vijesti. U radu ce stoga biti prikazani modaliteti rada istraživackih tijela u Republici Hrvatskoj.

Kompentencije u vježbama za zaštitu i spašavanje

Cyber-kriminal u tvrtkama i uloga ljudskih resursa u prevenciji

Uloga forenzičkog softvera EnCase pri radu s elektroničkim tragovima

Krešimir Filipić, bacc. crim., policijski službenik PU Zagrebačke, Nikola Protrka, struč.spec.cri... more Krešimir Filipić, bacc. crim., policijski službenik PU Zagrebačke, Nikola Protrka, struč.spec.crim.-univ. spec. inf., predavač na MUP-a Visokoj policijskoj školi RH u Zagrebu. Uloga forenzičkog softvera EnCase pri radu s elektroničkim tragovima Sažetak U suvremeno doba svjedoci smo nezaustavljivog i izuzetno brzog trenda razvoja informacijskih tehnologija. Internet je postao glavno mjesto razmjene podataka, reklamiranja i komunikacije među ljudima. Međutim, moramo biti svjesni da se Internetom koriste i brojne kriminalne organizacije i pojedinci radi ostvarivanja svojih kriminalnih namjera, kao što su "cyber" terorizam, razmjena zabranjenog pornografskog materijala, dječja pornografija, iznude, krađe identiteta ili nekom drugom oblik zabranjenog ponašanja. Elektroničke tragove pohranjene na računalima i raznim drugim medijima moguće je pronaći čak i kada korisnik te podatke obriše ili su oni skriveni na diskovima, za što računalni forenzičari koriste razne programske alate pomoću kojih obnavljaju i pronalaze takve dokumente, a kao jedan od takvih alata jest računalni program "EnCaseForensics". Ovim računalnim programom koristi se velik broj razvijenih policijskih organizacija poput SAD-a, Velike Britanije i drugih, a njegova osnovna namjena u policijskom smislu predstavlja pretraživanje računala i drugih nositelja elektroničkih tragova s ciljem pronalaska mogućih elektroničkih tragova. Encase predstavlja forenzički sveobuhvatan alat, ali zahtjeva visoku razinu stručnosti i znanja forenzičara koji se alatom koristi. Tako forenzičar mora imati dobra znanja o operativnim sustavima Windows, MacOS, Unix i Linux, kao i oblike datotečnog sustava u kojima su programi, datoteke i dokumenti pohranjeni (FAT, NTFS i slično). Prilikom pretraživanja medija za pohranu podataka Encase prikazuje izbrisane dokumente, particije, promijenjene dijelove dokumenata, šifrirane dokumente i drugo, te uključuje i programski jezik EnScript.

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Kibernetički napad kao alat za izazivanje katastrofe

ABSTRACT

Using Security Intelligence in Corporations

Journal of forensic sciences & criminal investigation, Jul 13, 2018

This paper explains security intelligence and how corporations use it to maintain the security of... more This paper explains security intelligence and how corporations use it to maintain the security of information systems by analysis of malicious content. Most famous threats to corporate information systems and departments that fight against these threats are explained, as well the tools for collecting data for analysis. Most common public available services for analysis are explained, and commercial brand-named tools. Dynamic and static analysis are divided and explained also, with awareness of security incident.