HDCP 2.2 Authentication: RSA Cryptography

Synopsys Blog, May. 05, 2015 – 

In the blog post, The HDCP 2.2 Authentication Process ? an Introduction, we discussed why we need HDCP, and the basic steps of the HDCP Authentication Process. We noted that an advanced version of RSA is the underlying cryptography standard used during the Authentication and key exchange.

Here, we will discuss the basics of RSA cryptography. You can learn more about the HDCP 2.2 Authentication Process by downloading our whitepaper, Demystifying the HDCP 2.2 Authentication Process.

Basics of RSA Cryptography

All encryption and decryption techniques in cryptography can be classified into 2 categories:

• Symmetric Key
• Public Key

In the Symmetric Key category, both encryption key and decryption key are known to the transmitter as well as the receiver, or a common encryption key is shared between the transmitter and the receiver, whereas decryption key is same or easily computed from the encryption key. A common example of this type of encryption technique is AES which is also used in HDCP2.2 for encryption of the audio visual content.

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