Nice article why hard disc encryption schemes without the ability to have a good diffusion method are bad.
Nice overview of different published recommendations for encryption key lengths
Comparison Chart of Different VPN solutions
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HTTPS certificate chain check if weak sha-1 cipher is used
A atlernative SSL/TLS online test tool to check compliance with PCI-DSS
Creating JavaScript based crypto is possible but risky
RSA Schlüssel finden anhand von Ultraschall Signale, die von der CPU ausgestrahlt werden