SecretSMS is an application available in Cydia that lets you send text messages without making the content accessible unless the message recipient does not know the password.The operation is based on sending a link instead of the message.
SecretSMS is a very useful, convenient, safe and professional app. This app requires an internet connection. Your iPhone or iPod touch must be jailbroken in order to install this app. SecretSMS is available for free on Cydia under ModMyI repository.
SecretSMS is available free via Cydia Repo ModMyi.
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What happens if u forget the password?
Does the number of the hidden SMS appears in the bill ?