Encryption and
decryption functions

Drag and drop files or directories into the drag & drop field for encryption. SAV7 allows the encryption of multiple files as well as directories; the selected files are zipped before the encryption process.

Unlike other applications, SAV7 generates a secure key (.key file). The key file represents the only way to successfully decrypt encrypted files. The key file is further protected against tampering and brute force attacks with hashing. Warning: Interference with the key file will damage the key and make access to the encrypted data impossible, as the hash validation detects these manipulations.

When “Secure deletion of original file(s)” is activated in the settings, the original files are irreversibly deleted after the encryption process. This procedure removes any references to the file in the file system and makes recovery by forensic tools more difficult. Caution: the process of secure deletion cannot be 100% guaranteed on SSDs (Solid-State Drives).

SAV7 introduced the additional feature of an expiration date in version 1.4. This feature allows setting an expiration date, which enables decryption with the key file only until the chosen date. After this date, access to the file is no longer possible. The key file thus loses its effectiveness as a key and is secured against attempts to manipulate the expiration date through hashing.

Decryption is only possible through the key file (.key). During the decryption process, several checks and validations of the key file are conducted. Only if the validation of the key phrase, the hash, and the expiration date match, can decryption be performed.