According to its structure I'd say that this is SEAL (<span>Software-Optimized Encryption Algorithm). It's difficult to describe how it works, because this kind of ciphers is very tricky. This algorithm uses 160 bit key and it uses 3 tables (R, S, T) to encode and decode.
I'll attach the image where you can see a process of creating a pseudo-random function:
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A character or collection of characters with a specific meaning is called a field.
<h3>What does the technical term "field" mean?</h3>
A field is a purpose-driven, typically fixed-sized section in a fixed or known location within a unit of data, such as a record, message header, or computer instruction. A field may be divided into smaller fields depending on the situation.
<h3>What does a file structure field mean?</h3>
A record is an entire set of fields, a field is a single piece of information, and a file is a collection of records. An analogy between a file and a phone book is a phone book. There is a list of records in it, and each record has three fields: a name, an address, and a phone number.
learn more about field here
<u>brainly.com/question/28002617</u>
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The relational operator used would probably be <=