sourabhCybersecurity Awareness: A Developer's Perspective
Understanding threats, building safer habits, and developing secure apps.
Cybersecurity
Understanding threats, building safer habits, and developing secure apps.
- Cryptographic Hashing vs. Two-Way Encryption
- The Avalanche Effect & Diffusion
- Defense in Depth & Session Isolation
Key takeaways
Cryptographic Hashing vs. Two-Way Encryption
Hashes are one-way mathematical transformations. While encryption allows plaintext recovery with a private key, a hash digest can never be reversed algebraically. Use hashes for credential validation and data integrity checks.
The Avalanche Effect & Diffusion
In secure hash algorithms like SHA-256, changing even a single bit of input flips approximately half of the output bits randomly. This property ensures an adversary cannot deduce how close a guess is to the actual password.
Defense in Depth & Session Isolation
Never rely on a single defensive layer. Use HttpOnly session cookies to guard against XSS token theft, strict SameSite policies to prevent CSRF, and sliding-window rate limiters to deflect automated credential stuffing.
Labs
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