In more recent times, people
have continued their efforts to
keep secrets secret using various
techniques.

For instance, in the 18th
century, people used code rings to keep messages
hidden, and during World War II, a unique encryption machine called Enigma was
invented.

In the 21st century, a number of encryption techniques have been
developed, utilizing computer science and internet technology.

Indeed, the process
of encrypting and decoding secrets has resulted in significant advancements in
modern science and mathematics.

How will secrets be kept hidden in the future?

And how will they be revealed?

In more recent times, people have continued their efforts to keep secrets secret using various techniques.

<keep+목적어+목적보어>는 ‘~을 …하게 유지하다’라는 뜻으로, keep secrets secret 구문에서 두 번째로 사용된 secret은 ‘비밀의’라는 의미를 갖는 형용사임에 유의한다.

For instance, in the 18th century, people used code rings to keep messages hidden, and during World War II, a unique encryption machine called Enigma was invented.

to keep은 목적을 나타내는 to부정사이며, called 앞에는 <주격 관계대명사+be동사>인 that[which] is가 생략되었다.

In the 21st century, a number of encryption techniques have been developed, utilizing computer science and internet technology.

a number of는 복수 취급하여 동사 have가 쓰였다. utilizing은 동시상황을 나타내는 분사구문이다.

Indeed, the process of encrypting and decoding secrets has resulted in significant advancements in modern science and mathematics.

<A result in B>는 ‘A의 결과로 B가 되다’라는 의미로 어떤 행동이나 과정이 특정한 결과를 낳을 때 쓰인다. 이와 달리 <B result from A>는 ‘B가 A라는 원인에서 비롯되다’는 의미이다.

I am proof that it is possible to overcome adversity and make a positive impact on the lives of others.

<it(가주어) ~, to(진주어) ...> 구문이며 to overcome과 (to) make가 병렬구조로 연결되었다.

~ to make a difference, no matter how big or small.

no matter how는 ‘(그 변화가) 얼마나 … 간에 상관없이’라는 뜻으로 big or small 뒤에 it is(=the difference is)가 생략되었다.