Pen drive and SD card courses: how to stop copying
Files on a pen drive can always be copied, so make copies useless: encrypted lectures that play only in your player, activation bound to one device, enforced limits and a visible watermark.
#encryption
20 articles tagged #encryption
Articles
Video encryption for online courses, explained simply
Video encryption protects course videos in transit, at rest and in downloads, but not once they are decrypted for viewing, so it can't stop screen recording, cameras or shared logins.
Encrypted video player vs DRM: what's the difference?
An encrypted player fetches its own key from the platform; DRM delivers the key in a licence to a module from Google, Apple or Microsoft. A protected player isn't DRM, and neither stops cameras.
What is decryption? Meaning, keys and examples
Decryption turns ciphertext back into readable data with the right key. A worked AES-GCM example, the kinds of keys involved, and why attackers target the moment of decryption.
Encoding vs encryption vs hashing: what's the difference?
Encoding changes format, encryption hides data and hashing fingerprints it. A side-by-side table, a task-by-task guide, and where salts, peppers and obfuscation fit.
What is encryption? A plain-English guide
Encryption protects your UPI payments, WhatsApp chats and course videos. Here's how it works, what keys do, and what encryption can and can't protect.
Symmetric vs asymmetric encryption: what's the difference?
One shared key, or a public and private pair? How the two families of encryption work, what each is good at, and why the internet relies on both at once.
AES-256, explained simply
What AES-256 is, what the 256 means, what happens inside the cipher, and why real-world failures come from key handling rather than the algorithm.
How SSL/TLS works: the handshake, certificates and session keys
A step-by-step walk through the TLS 1.3 handshake, how certificates prove a site is genuine, and how session keys keep each connection private.
Encryption at rest vs in transit: what each protects
In transit protects data on the network, at rest protects it in storage, and neither covers data in use. What each one stops, what cloud defaults cover and how to answer questionnaires.
Can encrypted data be hacked? How encryption really fails
Attackers rarely break the maths. They steal keys, guess passwords, attack devices before encryption or after decryption, or exploit bugs. What that means for protecting video.
Is AES-128 still secure? Key size vs key handling
Yes, with caveats that have nothing to do with key length: the brute-force maths, what quantum computing changes, GCM and CBC pitfalls, and AES-128 in HLS video.
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