4 Knowledge Base


 TelecomTrainning.net > Knowledge Base
 Viewing KB Article
Good Morning, - Please register or - log-in to your account.
Search   Saved Questions   Ask a question
Available categories
100 of Questions in LTE
CCNA Certification
CCNA Sample Q & A (1000 + Q &A)
(Network +) Certification
(Network +) Sample Q & A (1000 + Q &A)
General/Interview Q& A on Networking
Home Networking
General/Interview Q& A on Networking
VOIP, SIP & Asterisk
Q & A on VOIP,Ethereal, SIP & Asterisk
Telecom Test Equipments
Q & A on Telecom Test Equipment
PSTN / Wireline
General / Interview Q & A on PSTN / Wireline
LTE, Wireless, 3G ,Diameter and HSS
General/Interview Q & A on LTE, Wireless, 3G ,Diameter and HSS
Telecom General
Any Q & A in Telecom in General

Top Questions
Friends, Describe Secure storage and distribution of A-Keys?
How do I monitor SS7 Traffic in spectra2?
what is the difference between E1 signal & Ethernet signal ?
Explain me the difference between a repeater, bridge and router? Relate this to the OSI model.
What is the difference between BRI & PRI ?
Can you tell me about PBGT?
What is GGSN?
Guys what is the purpose of Umbrella Cell Approach in GSM ?
What is the difference between Electrical-tilt and Mechanical-tilt of an antenna?
What is BSC?
how can we explain media gateway in MSc?
Can any one explain me how sms flow will work using ss7 network ?( from physical layer to application layer)
Explain SLTA and SLTM messages in MTP3?
why cellphone towers are painted in red and white?
what is EDAp? what is the functions of EDAP?
wat is the difference betweem MSC & GMSC, & MSS & GCS?
Hi guys what is WAP?
what is sdh?
Friends, What is the purpose of Packet Control Unit in BSC?
What is difference in between soft handover and hard handover in UMTS network ?

What is the difference between 40-bit and 128-bit security?
terrylee 03-November-2008 03:46:02 PM


Posted by michaelcoyne

he early implementations of SSL in Web browsers, first Netscape 3 and then Microsoft Internet Explorer 3, used a 40-bit SSL encryption standard. Unfortunately, 40-bit encryption proved too easy to decipher or crack in practice. To decipher an SSL communication, one simply needs to generate the correct decoding key.

In cryptography, a common deciphering technique is brute-force decryption; essentially, using a computer to exhaustively calculate and try every possible key one by one. 2-bit encryption, for example, involves four possible key values:

00, 01, 10, and 11

3-bit encryption involves eight possible values, 4-bit encryption 16 possible values, and so on. Mathematically speaking, 2n possible values exist for an n-bit key.

While 240 may seem like a very large number, it is not very difficult for modern computers to crack this many combinations in a reasonable time period. The makers of Web browser software recognized the need to increase the strength of encryption and moved to a new standard, 128-bit encryption several years ago.

Compared to 40-bit encryption, 128-bit encryption offers 88 additional bits of key length. This translates to 288 or a whopping


additional combinations required for a brute-force crack.
In computer cryptography, a key is a long sequence of bits used by encryption / decryption algorithms. For example, the following represents a hypothetical 40-bit key:

00001010 01101001 10011110 00011100 01010101

A given encryption algorithm takes the original message, and a key, and alters the original message mathematically based on the key's bits to create a new encrypted message. Likewise, a decryption algorithm takes an encrypted message and restores it to its original form using one or more keys.
Based on the past history of improvements in computer performance, security experts expect that 128-bit encryption will work well on the Internet for at least the next ten years.
Posted by sagitraz

Q&A Rating

Q&A Rating
Rate This Question and Answer

Related Questions
Friends, Can anyone explain about U-Law?
Friends I have a doubt that , what are the benefits of Cisco Media Gateway Manager?
Friends I have a doubt you have an IP address of and a subnet mask of What is the class,how many bits are being subnetted, and what is the broadcast address?

Search questions via popularity
Top viewed questions  Top emailed questions  Most printed questions  Most saved questions
Copyright © Telecom Training, All Rights Reserved