Malicious cryptography - exposing cryptovirology
Malicious cryptography - exposing cryptovirology
... Malicious Cryptography have done very success- fully is to capture the essence of how security can be subverted in this non-standard environment. On several occasions, they refer to game the- ory ... Discrete-Log Cryptosystems 265 12.1 The Discrete-Log SETUP Primitive . . . . . . . . . . . . . 266 12.2 Diffie-Hellman SETUP Attack . . . . . . . . . . . . . . . . 268 12.3 Security of the Diffie...
Ngày tải lên: 19/03/2014, 13:40
Malicious cryptography - kleptographic aspects (academic paper)
... lead to a non-trivial factor of n with non-negligible probability. Now consider case (2). Since E occurs with non-negligible probability it fol- lows that A may in fact be computing non-trivial factors ... Digital Signatures and Public-Key Cryptosystems. In Communications of the ACM, volume 21, n. 2, pages 120–126, 1978. 6. A. Young, M. Yung. Malicious Cryptography: Exposing Cryptovirolo...
Ngày tải lên: 19/03/2014, 13:40
Scrambling Through Cryptography
... symmetric cryptography Elliptic Curve Cryptography • First proposed in the mid-1980s • Instead of using prime numbers, uses elliptic curves • An elliptic curve is a function drawn on an X-Y axis ... products • Multiplies two large prime numbers Diffie-Hellman • Unlike RSA, the Diffie-Hellman algorithm does not encrypt and decrypt text • Strength of Diffie-Hellman is that it allows two us...
Ngày tải lên: 17/09/2012, 10:43
Exposing an Existing Application As a Portlet
... Portlet</description> <portlet-name>forum</portlet-name> <display-name>Portalbook</display-name> <portlet-class> com.portalbook.forums.ForumPortlet </portlet-class> <expiration-cache> ;-1 </expiration-cache> <supports> <mime-type>text/html</mime-type> <portlet-mode>VIEW</portlet-mode> </supports> 2840ch...
Ngày tải lên: 05/10/2013, 04:20
Handbook of Applied Cryptography - chap9
... (RIPE-MAC) RIPE-MAC is a variant of CBC-MAC. Two versions RIPE- MAC1 and RIPE-MAC3, both producing 64-bit MACs, differ in their internal encryption function E being either single DES or two-key ... h 1 and h 2 in Fact 9.27 are n-bit hash functions, then h produces 2n-bit out- puts; mapping this back down to an n-bit output by an n-bit collision-resistant hash func- tion (h 1 and h 2 are candi...
Ngày tải lên: 17/10/2013, 16:15
Mật mã ( Cryptography) phần 3
... băm SHA-1 để truy lại một khóa gồm 8 byte từ chuỗi "S0meVereeStr@ngeP@$$w0rd") sẽ sinh ra kết xuất tương tự như sau: Key = 5 3-7 2-7 4-5 B-A 4-8 8-A 4-8 0 Salt = 7 0-8 2-7 9-F 4-3 B-F9-DF-D2 Chú ... những ai sở hữu khóa riêng đều có thể giải mậ t hóa dữ liệu đ - ược- mật-hóa bằng khóa công khai. Để tạo một bí mật được-mật-hóa-bất-đối-xứng, bạn phải có khóa côn...
Ngày tải lên: 17/10/2013, 17:15
An Introduction To Cryptography
... cryptosystem. An Introduction to Cryptography 13 The Basics of Cryptography Conventional cryptography In conventional cryptography, also called secret-key or symmetric-key encryption, one key is ... embraces both cryptography and cryptanalysis. Strong cryptography “There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading you...
Ngày tải lên: 18/10/2013, 17:15
Handbook of Applied Cryptography - chap10
... functionunspec- ified but recommend RIPE-MAC with 64-bit random-numberchallenges. Diffie [342, 345] notesthat two-pass challenge-responseidentification based on encryptionand randomchal- lenges has ... chosen-ciphertext attacks, 5 5 Both chosen-ciphertext and chosen-plaintext attacks are of concern for challenge-response techniques based on symmetric-key encryption. Handbook of Applied Cryptogr...
Ngày tải lên: 20/10/2013, 03:15
Handbook of Applied Cryptography - chap11
... and appli- cation of the extended Euclidean algorithm can be done off-line, in which case sig- nature generation (in instances where precomputation is possible) requires only two (on-line) modular ... signatures are seen. Chosen-message attacks against signature schemes are analogous to chosen-ciphertext attacks against public-key encryption schemes (see §1.13.1). (c) adaptivechosen-messageat...
Ngày tải lên: 20/10/2013, 03:15
Mật mã ( Cryptography) phần cuối
... CryptoAPI hỗ trợ cả user-key-store và machine-key-store. Hệ điều hành Windows bảo đảm một user-key-store chỉ có thể được truy xuất bởi người đã tạo ra nó, nhưng một machine-key-store có thể được ... khai (public key) của người nhận. Theo đó, bạn có thể gửi khóa đối xứng đ - ược-mật-hóa cùng với dữ liệu đ - ược- mật-hóa. Người nhận phải giải mật hóa khóa đối xứng bằng khóa riêng (privat...
Ngày tải lên: 20/10/2013, 07:15