Nie so zipom som sa nezaoberal (na hackthissite.org nikto nepouziva zip )
Ale tusim ze od nejakej verzie zipu aj zip menil zabezpecenie na zlozitejsie, ale .zip mne osobne co sa tyka zabezpecenia uz proste neimponuje, ja by som ho na heslovany archiv nepouzil.

7zip ma aj vlastny format .7z, a podla wikipedie vypada ze ten je kryptovany podobne jak u rar
http://en.wikipedia.org/wiki/7z
The 7z format supports encryption with the AES algorithm with a 256-bit key. The key is generated from a user-supplied passphrase using an algorithm based on the SHA-256 hash algorithm. The SHA-256 is executed 2^18 (262144) times[2] which causes a significant delay on slow PCs before compression or extraction starts. This technique is called key strengthening and is used to make a brute-force search for the passphrase more difficult.

To iste robi rar, akurat rar pouziva 128bit a 7z pouziva 256 bit. Preistotu Nevidim ale nic o salt, ale predpokladam ze KGB tam nacpal aj salt. Ak nie tak by bolo mozne pouzivat predpripravene hashe a islo by to tipujem tak 1000x rychlejsie. Sice by tie hashe zaberali radovo TB, ale dalo by sa