How secure is a book derived key and what can be done to strenghten it?
40477
Is a book cipher provably secure?
102898
Multiple AES Key Derivation from a master key
124568
How can I create a keystore?
34146
Which attacks are possible against raw/textbook RSA?
23058
How is HMAC(message,key) more secure than Hash(key1+message+key2)
32634
Taking advantage of one-time pad key reuse?
49130
implementation for product keys
47764
How secure is an encrypted LUKS filesystem?
122273
How to share an encrypted storage on Windows, Mac OS X and Linux in a secure way
132045
How do I enforce a password complexity policy?
55294
How can I create a product key for my C# application?
120462
How is a public key actually used to encrypt something?
127604
Secure files for download
131857
How can one securely generate an asymmetric key pair from a short passphrase?
138218
Is it possible to perform a rudimentary asymmetric key encryption algorithm by hand?
79891
Key Derivation Functions vs. Password Hashing Schemes
124412
Is there a package to secure rendered pdf with a password?