Home » IBM » C9030-644 » Which is the strongest algorithm supported on the z13 hardware to enable this?
A customer wants to protect large quantities of data being transmitted from their z Systems processor to one of their subsidiaries.
Which is the strongest algorithm supported on the z13 hardware to enable this?
A. AES-256
B. DES
C. TLS
D. Triple-DES
Correct Answer: A
Explanation/Reference:
The CP Assist for Cryptographic Function (CPACF) offers the full complement of the Advanced Encryption Standard (AES) algorithm and Secure Hash Algorithm (SHA) with the Data Encryption Standard (DES) algorithm.
AES data encryption is a more mathematically efficient and elegant cryptographic algorithm, but its main strength rests in the option for various key lengths. AES allows you to choose a 128-bit, 192-bit or 256-bit key, making it exponentially stronger than the 56-bit key of DES.
Even Triple DES (3DES), a way of using DES encryption three times, proved ineffective against brute force attacks.
References:
IBM z13 Technical Guide (May 2016), page 24
https://info.townsendsecurity.com/bid/72450/what-are-the-differences-between-des-and-aes-encryption
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