- Tytuł:
- Asymmetric cryptography and practical security
- Autorzy:
- Pointcheval, D.
- Powiązania:
- https://bibliotekanauki.pl/articles/309405.pdf
- Data publikacji:
- 2002
- Wydawca:
- Instytut Łączności - Państwowy Instytut Badawczy
- Tematy:
-
kryptografia
podpis cyfrowy
kryptografia asymetryczna
bezpieczeństwo
cryptography
digital signature
public-key encryption
provable security
random oracle model - Opis:
- Since the appearance of public-key cryptography in Diffie-Hellman seminal paper, many schemes have been proposed, but many have been broken. Indeed, for many people, the simple fact that a cryptographic algorithm withstands cryptanalytic attacks for several years is considered as a kind of validation. But some schemes took a long time before being widely studied, and maybe thereafter being broken. A much more convincing line of research has tried to provide "provable" security for cryptographic protocols, in a complexity theory sense: if one can break the cryptographic protocol, one can efficiently solve the underlying problem. Unfortunately, very few practical schemes can be proven in this so-called "standard model" because such a security level rarely meets with efficiency. A convenient but recent way to achieve some kind of validation of efficient schemes has been to identify some concrete cryptographic objects with ideal random ones: hash functions are considered as behaving like random functions, in the so-called "random oracle model", block ciphers are assumed to provide perfectly independent and random permutations for each key in the "ideal cipher model", and groups are used as black-box groups in the "generic model". In this paper, we focus on practical asymmetric protocols together with their "reductionist" security proofs. We cover the two main goals that public-key cryptography is devoted to solve: authentication with digital signatures, and confidentiality with public-key encryption schemes.
- Źródło:
-
Journal of Telecommunications and Information Technology; 2002, 4; 41-56
1509-4553
1899-8852 - Pojawia się w:
- Journal of Telecommunications and Information Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł