PC上のファイルやフォルダー、ドライブを暗号化すると、特定の復号鍵がなければそのPCに入っているデータを知られることはない。復号鍵とは、PCの持ち主だけが知っているパスワードであることがほとんどだ。つまり、パスワード（復号鍵）を知られて ...

I'm looking to encrypt a file with OpenSSL functions (blowfish, des, rc4-- haven't picked one yet). Anyhow, after decrypting a file, I need to know if the file was correctly decrypted. The only way it ...

On Windows 11/10 PCs, most users set up an admin/login password to prevent others from accessing their computers without their knowledge; however, this may not be enough if we need to protect ...

The widely used PDF format supports data-saving encryption, allowing you to protect sensitive documents so that only those with the correct password can access them. In the old days, you’d need a ...

Porcupins asked the Antivirus & Security Software forum if encryption standards like AES really make your data secure. There’s no such thing as perfect security. Someone with sufficient time and money ...

Microsoft Excel has been one of the go-to spreadsheet apps for several decades, and it's developed an array of tricks throughout its lifetime, not just for making data entry, editing, and organization ...