2 @unnumbered Precautions
6 We use password (passphrase) authentication, so overall security fully
7 depends on its strength. So you should use long, high-entropy
8 passphrases. Also remember to keep passphrase on temporary file and read
9 it securely as described in @ref{Verifier}.
12 You must @strong{never} use one key for multiple clients.
13 If so, then all security is ruined and transmitted data can
17 You must use @strong{cryptographically good} pseudo random number
18 generator. By default we use default @code{crypto/rand} library that
19 reads @code{/dev/urandom} source. Some GNU/Linux and FreeBSD systems
20 are rather good with this entropy source. Closed proprietary ones are
21 always not and you must use optional @ref{EGD} feature with them.