What is a hash function?

A hash function is a one-way mathematical algorithm that converts input of any size into a fixed-length string of characters. The same input always produces the same hash, but you cannot reverse-engineer the original input from the hash.

Which hash algorithm should I use?

Use SHA-256 for general purposes — it is secure, fast, and widely supported. MD5 and SHA-1 are broken for security use (collision attacks found). For passwords, use bcrypt, scrypt, or Argon2 instead of raw hash functions.

Is MD5 still safe to use?

MD5 is not safe for security applications since collision attacks were demonstrated in 2004. However, MD5 is still useful for non-security checksums like file integrity verification and cache keys where collision resistance is not critical.

What is a hash collision?

A collision occurs when two different inputs produce the same hash output. For secure hash functions, collisions should be computationally infeasible. MD5 and SHA-1 have known collision vulnerabilities, making them unsafe for cryptographic use.

Hash Generator - MD5, SHA-1, SHA-256, SHA-512

Što su kriptografske hash funkcije?

Kriptografska hash funkcija je matematički algoritam koji preslikava podatke proizvoljne veličine u niz znakova fiksne veličine. To je jednosmjerna funkcija.

Podržani Algoritmi

MD5 (128-bit): Brz, ali se smatra nesigurnim. Koristi se za provjeru integriteta datoteka (checksums). Fast but considered insecure for cryptographic purposes. Still used for checksums.
SHA-1 (160-bit): Zastarjeli algoritam. Ne preporučuje se za sigurnost, ali se još uvijek koristi u sustavima poput Gita. Deprecated for security. Vulnerable to collision attacks since 2017.
SHA-256 (256-bit): Industrijski standard. Koristi se u SSL/TLS certifikatima i digitalnim potpisima. Part of SHA-2 family. Widely used in SSL, Bitcoin, and modern security.
SHA-512 (512-bit): Maksimalna sigurnost. Preporučuje se za hashiranje lozinki. Strongest common hash. Used in high-security applications.

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Je li MD5 još uvijek siguran za korištenje?

MD5 se smatra kriptografski probijenim. Koristite ga samo u nesigurnosne svrhe. Za sigurnost koristite SHA-256 ili SHA-512.

Može li se hash obrnuti (dekriptirati)?

Ne. Hash funkcije su jednosmjerne. Međutim, slabe hasheve moguće je pogoditi pomoću rječnika (rainbow tables). Uvijek koristite pojam 'salt' pri pohrani lozinki.

🔐 Generator Sažetaka (Hash)

Što su kriptografske hash funkcije?

Podržani Algoritmi

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Key Facts

Frequently Asked Questions

🔐 Generator Sažetaka (Hash)

Što su kriptografske hash funkcije?

Podržani Algoritmi

Često Postavljana Pitanja

Key Facts

Frequently Asked Questions

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