What can be proven about the security of a product cipher?

1577

---

How are block ciphers used to encrypt data longer than the block size?

1496

---

Can symmetric block ciphers be used for message authentication?

1537

---

What exactly is DES?

1565

---

What is differential cryptanalysis?

1598

---

How was NSA involved in the design of DES?

1484

---

Is DES available in software?

1460

---

Is DES available in hardware?

1718

---

Can DES be used to protect classified information?

1539

---

What are ECB, CBC, CFB, OFB, and PCBC encryption?

3301

---

What is the difference between the CAs?

2116

---

What is a chained certificate?

1997

---

How do CAs sign certificates?

2055

---

What is an encryption "key" and what is the importance of key length?

1672

---

What is an algorithm?

2044

---