Security Requirements for Multimedia Archives

Table 1

Known attacks for cryptographic primitives.

Class	Algorithm	Known attack	Complexity
Block cipher	DES	Differential cryptanalysis	2^∧49
Block cipher	DES	Linear cryptanalysis	2^∧43
Stream cipher	RC4	Royal Holloway attack	2^∧24
Hash function	MD4	Differential cryptanalysis	2^∧8
Hash function	MD5	Differential cryptanalysis	2^∧19
Hash function	RIPEMD	Differential cryptanalysis	2^∧16