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AES is also relatively easy to implement in hardware and software. This makes it a good choice for a wide variety of platforms, from embedded devices to high-performance computers.

Overall, I think AES is a very good encryption algorithm. It is secure, efficient, and easy to use. It is a good choice for protecting sensitive information in a variety of applications.

Here are some additional thoughts on the criteria used to select AES:

• Security: This is the most important criteria, as it is the goal of any encryption algorithm to protect data from unauthorized access. AES has been shown to be very secure, and it is unlikely that any significant weaknesses will be found in the foreseeable future.
• Efficiency: This is also an important criteria, as it ensures that AES can be used to protect data in real-time applications. AES is very efficient, and it can be used to encrypt data at very high speeds.
• Implementability: This criteria ensures that AES can be implemented in a variety of platforms, from embedded devices to high-performance computers. AES is relatively easy to implement, and it is available in a variety of software and hardware libraries.
• Expandability: This criteria ensures that AES can be used to protect data with larger key sizes and block sizes in the future. AES is expandable, and it can be used with key sizes up to 256 bits.
• Robustness: This criteria ensures that AES is resistant to implementation errors. AES is robust, and it has been shown to be resistant to a variety of implementation errors.

I think the criteria used to select AES were very well-chosen. They ensured that AES would be a secure, efficient, and easy-to-use encryption algorithm that could be used to protect sensitive federal information for many years to come.