In a public-key cryptosystem, (71) encrypted with the public key can only be deciphered with the private key from the same (72) . Conversely, (71) encrypted with the private key can be decrypted only with the public key. Users can make their public keys (73) available or place them at a key distribution center or others to access. However, the private key must be (74) safe. In public-key systems there’s no (75) to find a safe channel for communicating a shared secret key.
（72）是（）
A person becomes part of the Christian community through baptism — it is a matter of choice (21) birth. The Christian community is a gathered community (22) who believe that Jesus is the Christ and that they have salvation (23) . It is open to males and females of any age, race, or (24) . A Christian is normally affiliated with a particular parish or congregation that is (25) the care of a particular clergy-person A baptized person is usually (26) a Christian by all Christians everywhere: however, there may be some additional requirements to meet if a person (27) to a church of a different tradition.
Giving money and goods needed by others (28) a part of Christian living. Some Christians engage in tithing, the (29) of 10 percent of their income to support the work of the church, (30) includes charitable services of those in need. Other Christians give smaller (31) of their income to the chu
A. accepted
B. accepting
C. accepting as
D. accepted as
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