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Secure Hash Algorithm is a family of cryptographic hash functions published by NIST. This includes SHA-1, and the SHA-2 and SHA-3 families of functions. SHA-1 is deprecated for all usages.
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Are there any known vulnerabilities in PPTP VPNs when configured properly?
The most secure configuration of PPTP is to exclusively use:
MPPE-128 encryption (which uses RC4 encryption with a 128bit key)
MS-CHAPv2 authentication (which uses SHA-1)
strong passwords (minimum 128 … bits of entropy)
I realize that RC4 and SHA-1 have weaknesses, but I am interested in practical impact. …