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Learn Python ssl to build TLS clients and servers, validate certificates and hostnames, configure CA trust, minimum versions, and mTLS.

Learn Python HMAC to sign and verify webhooks, files, and service messages with SHA-256, safe keys, canonical data, and replay

Learn Python hashlib for SHA-256, file verification, BLAKE2, key derivation, password hashing decisions, and safer digest handling.

Learn Python binascii to convert hexadecimal, Base64 and quoted-printable, calculate CRC values, and validate binary data safely.

Learn Python codecs to inspect encodings, handle errors and BOMs, process incremental streams, and migrate codecs.open to open.

Learn Python base64 to encode bytes, use URL-safe Base64, validate padding, enforce limits, and distinguish encoding from encryption.

Learn Python urllib.parse to split URLs, build queries, encode components, and avoid risks involving urljoin, redirects, logs, and SSRF.

Learn Python ipaddress to validate IPv4 and IPv6, calculate CIDR networks, split subnets, summarize ranges, and build safer access policies.