See this discussion [1] for example where they say this explicitly. Passwords and logins and other sensitive details are encrypted, but item titles (including note titles) and URLs are not.
They have a new keychain design [2] in which most metadata (including item titles) is encrypted. This is currently used for iCloud syncing, and they plan to roll it out for other sync methods and perhaps local storage as well [1]. I am guessing this will happen in the new OS X version.
Comments
See this discussion [1] for example where they say this explicitly. Passwords and logins and other sensitive details are encrypted, but item titles (including note titles) and URLs are not.
They have a new keychain design [2] in which most metadata (including item titles) is encrypted. This is currently used for iCloud syncing, and they plan to roll it out for other sync methods and perhaps local storage as well [1]. I am guessing this will happen in the new OS X version.
[1] http://discussions.agilebits.com/discussion/12237/metadata-i...
[2] http://learn.agilebits.com/1Password4/Security/keychain-desi...