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Diffstat (limited to 'guides/source/security.md')
| -rw-r--r-- | guides/source/security.md | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/guides/source/security.md b/guides/source/security.md index c5c0e9bcf6..c701027479 100644 --- a/guides/source/security.md +++ b/guides/source/security.md @@ -95,7 +95,12 @@ Rails 2 introduced a new default session storage, CookieStore. CookieStore saves * The client can see everything you store in a session, because it is stored in clear-text (actually Base64-encoded, so not encrypted). So, of course, _you don't want to store any secrets here_. To prevent session hash tampering, a digest is calculated from the session with a server-side secret (`secrets.secret_token`) and inserted into the end of the cookie. -However, since Rails 4, the default store is EncryptedCookieStore. With EncryptedCookieStore the session is encrypted before being stored in a cookie. This prevents the user access to the content of the cookie and prevents him from tampering its content as well. Thus the session becomes a more secure place to store data. The encryption is done using a server-side secret key `secrets.secret_key_base` stored in `config/secrets.yml`. +However, since Rails 4, the default store is EncryptedCookieStore. With +EncryptedCookieStore the session is encrypted before being stored in a cookie. +This prevents the user from accessing and tampering the content of the cookie. +Thus the session becomes a more secure place to store data. The encryption is +done using a server-side secret key `secrets.secret_key_base` stored in +`config/secrets.yml`. That means the security of this storage depends on this secret (and on the digest algorithm, which defaults to SHA1, for compatibility). So _don't use a trivial secret, i.e. a word from a dictionary, or one which is shorter than 30 characters, use `rake secret` instead_. |