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Flame Virus: How malware became the new weapon of war June 12, 2012

The Flame virus uses a MD5 collision attack to generate a rogue Microsoft digital code-signing certificate. With the certificate in hand, the virus passes the malware to Windows computers as an update from Microsoft. It is recommended that certificate authorities stop signing digital certificates using MD5 as a cryptographic hash function. The US-CERT has discontinued the use of MD5 and now requires the SHA-2 family of hash functions. Electrosoft typically recommends the use of certificate authorities with SHA-256 and RSA 2048 cryptographic capabilities to sign digital certificates. 

More information regarding Flame Virus exploits please follow the link:

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- Amila Ranasinghe

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