In addition, the method of stream cipher is much quicker and it is easy to implement as compared to block ciphers, though. they have a significant safety issues. If the similar encryption key stream is utilized for a number of times. some types of attacks are able to reveal certain data and information (Network Sorcery, Inc. , 2011) and (Encryption and Decryption, 2011). On the other hand, Block Ciphers symmetric encryption algorithms is a way of data and information encryption that breaks down data and information into blocks and performs encryption or encoding on the data in every block. Additionally, a data block cipher encodes data in constant sized information blocks (usually the block is of 64 bits). In this scenario, the most commonly utilized block ciphers are AES and Triple DES (Network Sorcery, Inc. , 2011) and (Encryption and Decryption, 2011). Moreover, the design of a block cipher encryption is aimed to split the text into reasonably big (e.g. 128 bits) data blocks as well as encrypt every block in a separate manner. In this scenario, this encryption technique of every block normally relies on maximum one of the preceding data encrypted blocks. In addition, the identical encryption key is utilized for every data block. … Discuss what they are, how they work, their advantages/disadvantages, and how/why it was created (did it have a problem or purpose it solved). For comparing two asymmetric encryption algorithms I have selected RSA asymmetric encryption algorithm and DSA (Digital Signature Algorithm). RSA asymmetric encryption is the most well-known asymmetric algorithm based on public key infrastructure, distinguished after its developer Adleman and Rivest, Shamir. Additionally, the RSA makes use of public as well as private keys which are the functions of a couple of huge prime numbers arrangement. In addition, its protection level is discovered on the basis of the complexity of factoring enormous numbers. The RSA asymmetric encryption algorithm could be utilized for both public key encryption and digital signatures. In this scenario, the encryption keys employed for encoding and decoding in RSA working algorithm are produced by means of arbitrary data framework. In addition, the encoding key employed for encryption is a kind of public key known to all as well as the key utilized for decoding the original message is user’s private key. Moreover, DSA (Digital Signature Algorithm) is a U.S. Federal Government established standard or FIPS used for digital security and secret signatures. Furthermore, this standard was established by the NIST (National Institute of Standards and Technology) in the year 1991 for exploitation in their Digital Signature Standard (Encryption and Decryption2, 2011), (Pelleb, 2003) and (Sassaman, 2000). Encryption for secret key generation is extremely quicker for DSA that seems right if we analyze both the algorithms and their performance. In addition, the procedure of marking or signing is as