diplomsko delo
Nejc Štrubelj (Author), Arjana Žitnik (Mentor)

Abstract

Šifriranje nas neopazno obdaja vsakokrat, ko uporabljamo mobilne komunikacije, spletne storitve in podobno. Zahteve po učinkovitem šifriranju pa se vsak dan povečujejo. V delu predstavljamo šifriranje z avtentikacijo, ki je eno najbolj učinkovitih orodij za zagotavljanje varne komunikacije, saj zagotavlja tako zaupnost kot avtentičnost poslanih sporočil. Pokažemo, pred katerimi napadi je takšen sistem varen in razložimo zakaj. Razložimo delovanje zgoščevalne funkcije s ključem in pokažemo, kako nam ta pomaga pri ohranjanju verodostojnosti podatkov. Za konec predstavimo načine, kako sestaviti sistem za šifriranje z avtentikacijo, ter opišemo algoritma OCB in GCM, ki takšen sistem realizirata.

Keywords

kriptografija;šifriranje z avtentikacijo;MAC;AES;OCB;GCM;računalništvo in matematika;interdisciplinarni študij;univerzitetni študij;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FMF - Faculty of Mathematics and Physics
Publisher: [N. Štrubelj]
UDC: 004.056.55(043.2)
COBISS: 77480195 Link will open in a new window
Views: 441
Downloads: 37
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Other data

Secondary language: English
Secondary title: Authenticated encryption
Secondary abstract: Encryption surrounds us imperceptibly every time we use mobile communications, online banking, online services and the like. Meanwhile the demand for efficient encryption is growing daily. In this thesis, we present authenticated encryption, which is one of the most powerful tools for ensuring secure communications, since it provides both privacy and authenticity. We show which kind of attacks a system like that is effective against and explain why. We describe message authentication codes and show how they assure data integrity. Finally, we present different approaches to constructing authenticated encryption schemes: generic compositions which combine an encryption scheme and a message authentication code, and integrated schemes. Two algorithms that realize such systems are then presented: GCM and OCB.
Secondary keywords: cryptography;authenticated encription;MAC;AES;OCB;GCM;computer science;computer and information science;computer science and mathematics;interdisciplinary studies;diploma;Šifriranje (računalništvo);Računalništvo;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000407
Thesis comment: Univ. v Ljubljani, Fak. za računalništvo in informatiko
Pages: 52 str.
ID: 13381034