#StackBounty: #rsa Where is RSA-KEM used as of 2020?

Bounty: 100

RSA-KEM is introduced by Yuliang Zheng and Jennifer Seberry

• 1992, Practical Approaches to Attaining Security against Adaptively Chosen Ciphertext Attacks

and compared the security against OAEP variant by Jakob Jonsson, in 2002

• 2002, An OAEP Variant With a Tight Security Proof – Draft 1.0

I’ve found some documents that may indicate the usage of RSA-KEM in the wild.

• rfc5990: Use of the RSA-KEM Key Transport Algorithm in the Cryptographic Message Syntax (CMS)
• Key Encapsulation: A New Scheme for Public-Key Encryption by XML Security Working Group F2F, May 2009

What are the noticeable usage of RSA-KEM in the wild as of 2020?

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Get this bounty!!!