I've been using a little app called SafeSex to jot down notes securely; however it's not been maintained for ages and lacks polish. However, it does have Blowfish encryption built-in.
My question is: does anyone know of a reasonably polished alternative that supports encrypted note-taking? I'm aware of TrueCrypt, but I'd rather have a light app I could use securely on random machines without worrying about leaving copies my notes behind.
Store your most valuable notes in a LockNote. Hide your everyday notes in a safe place. Application and document in one: the mechanism to encrypt and decrypt a note is part of it. Secure, simple, independent. No installation required.
"Overall Design: Sha256 hash is used to convert an ascii pass phrase to a 256 bit encryption key. Pseudorandom data is used as an initialization vector for AES-256 encryption. Optionally, a the encryption key (NOT the passphrase) is encrypted using a second master key, and included in the file header. This master key can be used as an emergency data recovery key, or as a second key to be used by programs to read encrypted files."
"KryptoPad is a simple yet effective Notepad-like application with built-in text encryption and decryption functions. Its handy interface provides one-click encryption and decryption of entered or loaded text, as long as usual notepad-like operations. "