Why the first message after stepping away is heavy | Claude Code prompt caching and the 10/14 new feature: idle compaction

Conclusion Claude Code resends the entire conversation with every message. Cache lifespan is 1 hour for usage included in ...
techtarget

What is a message authentication code (MAC)? How it works and best practices

A message authentication code (MAC) is a cryptographic checksum applied to a message to guarantee its integrity and authenticity. A MAC is used in network communications to confirm that a message is ...
ZDNet

Why SMS two-factor authentication codes aren’t safe and what to use instead

A million two-factor authentication codes sent via SMS passed through an obscure third-party company. Here's how it happened and why it's a problem. We’ve probably all received confirmation codes sent ...
techtarget

What is HMAC (Hash-Based Message Authentication Code)?

Hash-based message authentication code (HMAC) is a message encryption method that uses a cryptographic key with a hash function. It gives the server and the client each a private key known only to ...