# OCR A Level Computer Science H446 – Symmetric & Asymmetric Encryption Interactive Simulator + Work

OCR A Level Computer Science H446 – Symmetric & Asymmetric Encryption Interactive Simulator + Worksheet

Make encryption easier to understand with this interactive teaching resource that helps students explore symmetric and asymmetric encryption through practical demonstrations.

Designed for OCR A Level Computer Science H446 – Topic 1.3.1: Compression, Encryption and Hashing, this simulator helps students understand the differences between secret-key and public-key encryption.

What can students explore?

Students can experiment with a simple XOR encryption model, explore a small-number RSA example and investigate how encryption and decryption use keys differently.

The simulator uses simplified educational examples to help explain underlying concepts rather than provide production-grade encryption.

What’s included?

• Interactive offline HTML encryption simulator
• Student activity worksheet (PDF)
• Teacher guide and suggested teaching sequence (PDF)
• Teacher answers and extension guidance (PDF)
• Instructions and customisable licence template

Why use this resource?

Perfect for introducing a challenging Computer Science topic through visual demonstrations, practical experimentation and structured activities.

Suitable for classroom teaching, revision sessions, homework and independent study.

Works offline in a modern web browser. No accounts, software installations or internet connection required.

Independently developed teaching resource. Not endorsed by OCR.